The inner wall of the vesicle (region of closure) is frequently thickened to form a so-called " sensecushion," apparently a ganglionic offshoot from the sub-umbral nerve - ring.
The increase of the visceral dome, its spiral twisting, and the gradual closure of the space overhung by the mantle-skirt so as to v / FIG.
The method of this dorsal closure varies in different insects.
Graber has described a similar method of dorsal closure in the saw-fly Hylotoma.
B (still more advanced, dorsal closure complete) magnified 48 times.
The alluvial portion of the state, especially below the mouth of the Red river, is an intricate network of these bayous, which, before their closure by a levee system, served partially, in time of flood, to carry off the escaping surplus of river waters.
On the 10th of July the four signatory powers of the convention of London signed a protocol recording the closure of the incident (protocole de cloture), and on the 13th France united with them in signing another protocol (protocole des detroits) by which the powers engaged to respect the principle proclaimed by the sultan as to the closing of the Dardanelles to foreign warships.
C q t;: pm .-..,,?i are transferred into two tubes (Solenophoridae); and by the closure of the lower aperture reconstituted into two suckers, the margins of which are produced and folded so as to resemble the leaf-like outgrowths of the next group. In this division (Tetraphyllidea) four suckers or bothria are developed on the scolex, but their cavities are extremely shallow and their lips extremely mobile and variable in shape.
A, pilidium larva anus by the closure in of nemertine; B, Asplanchnapus the middle of such a slitschematized; C, a ploimal rotifer; like blastopore opening D, trochosphaera female (schematized into a sack-like stomach from Semper); E, veliger larva of mol as is seen in the larvae lusc; F, trochophore larva of annelid.
A system of closure called the previous question.
The Senate rules have no provision for the closure of debate, nor any limitation on the length either of a debate or of a speech.
The state of closure of the valves of the shell is not, therefore, one of rest; when it is at rest - that is, when there is no muscular effort - the valves of a Lamellibranch are slightly gaping, and are closed by the action of the adductors when the animal is disturbed.
Symptoms attendant on the hypnotic state are closure of the eyelids by the hypnotizer without subsequent attempt to open them by the hypnotized subject; the pupils, instead of being constricted, as for near vision, dilate, and there sets in a condition superficially resembling sleep. But in natural sleep the action of all parts of the nervous system is subdued, whereas in the hypnotic the reactions of the lower, and some even of the higher, parts are exalted.
It is still longer before the neural tube completes its closure in front, exhibiting a small orifice at the surface, the anterior neuropore.
B, Stage after closure of blastopore.