In the Calyptoblastea the perisarc is always continued above the From Allman's Gymnoblastic Hydroids, by permission of the Council of the Ray Society.
All the fins have a rounded outline; the short dorsal fin is without a spine, but the males possess a very thick and flattened outer ray in the ventral fins.
Ray Lankester, pt.
In his classification of birds Linnaeus for the most part followed Ray, and where he departed from his model he seldom improved upon it.
The Ray Society had the good fortune to obtain the ten original copper-plates, all but one drawn by the author himself, wherewith the work was illustrated.
Gisborne for a land line connecting St John's, Newfoundland, and Cape Ray, in the Gulf of St Lawrence, and proceeded himself to get control of the points on the American coast most suitable as landing places for a cable.
The buds may all become detached after a time and give rise to separate and independent individuals, as in the common Hydra, in which only polyp-individuals are produced and sexual elements From Allman's Gymnoblastic Hydroids, by permission of are developed the Council of the Ray Society.
The cortical tissues gradually shrink and dry up, turning brown and black in patches or all over, and when at length the cambium and medullary ray tissues dry up the whole twig dies off.
Soc., 1875; " Monograph on the Structure and Development of the Shoulder-girdle and Sternum," Ray Soc. London, 1868; W.
Or something even more, throwing a ray of light perhaps on the state and powers of the happy dead?
" - Interview with Metchnikoff in Sir Ray Lankester's Science from an Easy Chair, p. 43 2 In 1767, when Catherine II.
Ray Lankester) that this condition has been arrived at through some such intermediate stage as that offered by Polychaet Magelona.
Ray Lankester to the members of a series of tubes, proved in some cases to be excretory in nature, which exist typically to the number of a single pair in most of the segments of the Chaetopod body, and open each by a ciliated orifice into the coelom on the one hand, and by a pore on to the exterior of the body on the other.
The different behaviour of these two acids to a ray of polarized light was subsequently observed by J.
The most useful economically are several species of sturgeon and of herring, trout,barbel,chubb,bream, ray,sea-dace, carp, anchovy.
Among the other writers previous to the Revolution mention must be made of John Ray the botanist and of John Evelyn, both men of great talent and research, whose works are still in high estimation.
This foundation was laid by the joint labours of Francis Willughby (1635-1672) and John Ray (1628-1705), for it is impossible to separate their share of work in natural history more than to say that, while the former more especially devoted himself to zoology, botany was the favourite pursuit of the latter.
Willughby, the younger of the two, and at first the other's pupil, seems to have gradually become the master; but, he dying before the promise of his life was fulfilled, his writings were given to the world by his friend Ray, who, adding to them from his own stores, published the Ornithologia in Latin in 1676, and in English with many emendations in 1678.
Y Y P > > much skill, elaborated from them the excellent work known as Nitzsch's Pterylographie, which was published at Halle in 1840, and translated into English, for the Ray Society in 1867.
"Nonsense!" said the little man, turning red--although just then a ray of violet sunlight was on his round face.
It is a ray of light in the darkness, a shade between sadness and despair, showing the possibility of consolation.
From Allman's Gymnoblastic Hydroids, by permission of the Council of the Ray Society.
In this sub-order have received Such are the " snake-like zoids " and as such are generally inter 4"0 ' 'Y p P After Allman, Gymnoblastic Hydroids, by permission of the council of the Ray Society.
PTEROBRANCHIA, a zoological group established by Ray Lankester in 1877.
If we consider a number of particles which all lie upon a primary ray, we see that the phases of the secondary vibrations which issue along this line are all the same.
A ray of light from a lamp is thrown on the mirror, whence it is reflected upon a white surface or scale set at a distance of about 3 ft., forming a bright spot on the surface; the slightest angular deflexion of the mirror, owing to its distance from the scale, moves the spot of light a very appreciable distance to the right or left according to the direction of the angular movement.
From Allman's Gymnoblastic mnoblastic Hydroids, by permission of the Council of the Ray Society.
The histology described above for the polyp may be taken as the primitive type, from which that From Allman's G y mnoblastic Hydroids, by permission of the Council of the Ray Society.
After Allman, Gymnoblastic Hydroids, by permission of the council of the Ray Society.
Allman, " A Monograph of the Gymnoblastic or Tubularian Hydroids," Ray Society (1871-1872); 2.
Ray Lankester's term, homoplasy, has passed into currency as designating such cases where different genetic material has been pressed by similar conditions into similar moulds.