Otocysts situated close to the pedal nerve-centres.
Moreover, in many forms, in which in the adult condition there is only a single pair of anterior ganglia and a single pedal connective, a pleural ganglion distinct from the cerebral has been recognized in the course of development.
He was biking in the forest now, pine-scented and cool in the early morning air, watching more nimble cohorts pedal on by him as if he were standing still.
The permanent shell pe, Pedal ganglion.
At the same time, the junction of the visceral loop above the intestine prevents in all Streptoneura the shortening of the visceral loop, and it is rare to find a fusion of the visceral ganglia with either pleural, pedal or cerebral - a fusion which can and does a, Anus.
A ladder-like arrangement of the two pedal nerves and their lateral branches has been detected.
The cerebro pedal and pleuro-pedal connectives, however, in these cases are only separate in the initial parts of their course, and unite together for the lower half of their length, or for nearly the whole length.
Forms and in terrestrial genera such as Cyclostoma; (2) the anterior pedal gland opening into the anterior groove of the foot, generally present in aquatic species; (3) dorsal posterior mucous glands in certain Cyclostomatidae.
Oesophageal pouches present; pedal nerve-centres concentrated; a pedal penis near the right tentacle.
D, Pedal nerve.
Cynthia held the door handle, looking ready to jump while Dean contorted around the shift stick, barely able to press the pedal with his toe.
They've got a plate on the sole so your feet don't get numb and they hold on to the pedal better.
If stiff muscles didn't let them down, the group would pedal into Durango, Colorado, with one leg of the tour behind them.
O, Otocysts attached to the cerebro-pedal connectives.
The Pectinibranchia the pedal nerves are br, Ctenidium (branchial distinctly nerves given off from the pedal plume).
P, Pedal ganglion with otocyst attached.
The most important of these opens by the ventral pedal pore, situated in the median line in the anterior half of the foot.
Cunningham that in Buccinum the egg-capsules are formed by this pedal gland and not by any accessory organ of the generative system.
Pedal centres in the form of ganglionated cords; kidney provided with a ureter; viviparous; fluviatile.
G', Pleuro-pedal ganglion.
Pallial cavity transformed into a lung; pedal centres concentrated; a deep pedal groove.
Shell spiral; four cephalic tentacles; eyes absent; two pedal appendages.
V, Pleural and pedal ganglion c, Eye.
Animal fixed by the shell, the last whorls of which are not in contact with each other; foot small; two anterior pedal tentacles.
Pe, Pedal ganglion.
C, Doris (Actinocyclus) tuberculatus (Cuv.), seen from the pedal surface.
B, Pedal ganglion.
E, Pedal commissure.
We have already seen that De Blainville, though fully persuaded of the great value of sternal features as a method of classification, had been compelled to fall back upon the old pedal characters so often employed before; but now the scholar had learnt to excel his teacher, and not only to form an at least provisional arrangement of the various members of the Class, based on sternal characters, but to describe these characters at some length, and so give a reason for the faith that was in him.
The pedal equation is r 3 =a 2 p, which shows FIG.
That it is the first positive pedal of a rectangular hyperbola with regard to the centre.
The same name is also given to the first positive pedal of any central conic. When the conic is a rectangular hyperbola, the curve is the lemniscate of Bernoulli previously described.
The nerve ganglion is formed by an ingrowth of epiblast, and so are the pedal glands.
Males and larvae with a ciliated pedal cup and a simple ciliated disk.
It is the inverse of a central conic for the focus, and the first positive pedal of a circle for any point.
A pair of pedal otocysts, and a pair of osphradia at the base of the gills, appear to be always present.
19), consisting of a cerebro-pleural ganglion-pair, united by connectives to a pedal ganglion-pair and a visceral ganglion-pair (parietosplanchnic) .
1, Posterior (pedal) adductor muscle of the shells.
Left pedal ganglion.
When the pedal aperture is small and far forward there may be a fourth aperture in the region of the fusion behind the pedal aperture.
- View from the ventral (pedal) aspect of the animal of Arca noae, the mantle-flap and gill-filaments having been cut away.
I (6), ax) are the typical pedal ganglia; they are joined to the cerebropleural ganglia by connectives.
The sense-organs of Anodonta other than the osphradia consist of a pair of otocysts attached to the pedal ganglia (fig.
Isocardiidae.-Mantle largely closed, pedal orifice small; gill-plates of equal size; shell globular, with prominent and coiled umbones.
When the organ was played for her in St. Bartholomew's, the whole building shook with the great pedal notes, but that does not altogether account for what she felt and enjoyed.
Mind keeping your foot on the brake pedal while I rummage?
"He didn't pedal a bicycle to Kansas either, Dorothy," Fred said, peering at the map.
The invention of the damper-pedal in the pianoforte epitomizes the difference between polyphony and symphonic art, for it is the earliest device by which sounds are produced and prolonged in a way contrary to the spirit of "real" part-writing.
It is possible to conceive of any number of notes struck and sustained by the fingers as consisting of so many quasi-vocal parts; but when a series of single sounds is played and each sound continues to vibrate by means of a pedal which prevents the dampers from falling on the strings, then we are conscious that the sounds have been produced as from one part, and that they nevertheless combine to form a chord; and this is as remote from the spirit of polyphonic part-writing as modern English is from classical Greek.
Pedg, Pedal ganglion.
This is shown by the labial commissure and pedal cords of the nervous system, by the opening of the gonad into the right kidney, and by other points.
- The Common Limpet (Patella vulgata) in its shell, seen from the pedal surface.
On account of their position they were termed by him the " capito-pedal orifices," being placed near the junction of head and foot.
The smaller of the two renal organs was pe, Pedal ganglion.
Demonstrated by Lankester in 1867, at a pie, Pedal nerve.
The capito-pedal organs of Lankester (= rudimentary ctenidia).
K, 1, p, J affords a means of test ing the conclusion that we have in Lankester's 4 capito-pedal bodies the rudimentary ctenidia.
Pe, The fused pleural and pedal nerves.
Ab, Abdominal ganglion or site pe, The right pedal nerve.
Ceiving nerve from vis ce.pe, The cerebro-pedal connecceral loop.
P, Pedal nerve.
- Scutum, seen from the pedal surface.
Fusus, Pyrula, Purpura, Murex, Nassa, Trophon, Voluta, &c. The float of the pelagic Janthina, to which the egg-capsules are attached, probably is also formed by the secretion of the pedal gland.
Leydig, that the otocysts of Pectinibranchia even when lying close upon the pedal ganglion (as in fig.
But it has since been discovered that in the Protobranchia the cerebral ganglia and the pleural are distinct, each giving origin to its own connective which runs to the pedal ganglion.
B, Pedal ganglion-pair.
After a few more turns of the lathe he removed his foot from the pedal, wiped his chisel, dropped it into a leather pouch attached to the lathe, and, approaching the table, summoned his daughter.