44 Composition of Eggs. 
Sauvé, a physician of that city. We have discovered that these 
larger nutnber of Sharks. Torpedos are ovoviviparous. We 
found in the oviducts of one, eight small ones, four on each side. 
Each foetus when nearly born, had in the interior of the abdo- 
men, a considerable portion ~ its vitellus (yolk). We were able 
to examine this liquid, and we found in it, with the microscope, 
grains similar in appearance S those in the Ray’s eggs, though 
their forms were distinct. This is the only ane of the Torpe- 
dos’ egg we are as yet acquainted with. We cannot therefore 
say anything of the white of the eggs of this npedten of Cartilag- 
inze and of their shell. 
Eggs of the Bounce Shark, (Catulus major, &c.)—The eggs 
of our Bounce are rectangular, much longer, but much narrower 
than those of the Ray. Its shell is hard, resisting, yellowish, 
horny, like the filament which starts from pe angle. One is 
usually found in each oviduct, as in our Ray, to which another 
soon succeeds, after the laying of that wth ‘s completed in 
the belly of the female. The ovary of the Bounce, narrower 
than that of the Ray, is like it also in its structure ; and under its 
stroma, there is a greater or less number of ovules of very differ- 
ent sizes, from those which are hardly perceptible to those vitel- 
lin spheres ready to detach themselves from the ovary to enter 
the oviduct. In opening an egg, the vitellus appears to occupy 
the greater part. Its vitellin membrane is even more difficult to 
see than that of the Ray: the white is more viscous, the mem- 
brane containing it much more delicate ; the liquid, however, only 
contains some traces of albumen. Alcohol produces similar de- 
struction of the gelatinous Hani stopping the coagulation of these 
membranes. ‘The white o egg of a Bounce is therefore very 
much like that of an egg ts a eae. The yellow of this egg re- 
sembles very considerably that of a Ray’s egg. The very fluid 
liquid which composes it, holds suspended drops of yellowish oil, 
and a quantity of little white transparent grains, regular in form, 
bnt differing from that of the grains of the different sorts 
_ Rays which we have examined. 
figgs of “Melandres,” (Squalus galeus, Lin.)—If the Bounce 
shows the same ovological condition as the Ray, other sharks 
are like the to orpedos, for they are, like these, ovoviviparous. 
We found in these eggs, by the microscope, a large quantity of 
little grains of a different form from that of our Ray, but still 
visibly analogous. 
Eggs of the Round- Fish, (Squalus mustelus. )}—Another sort 
of shark, the Emisole (Squalus mustelus, Lin.) gave us quite a 
mber of o ; for gestation was not far enough adva 
to engage the eggs in the oviduct. This fact, fortunate for our 
erERSEDneanrmmeentatinionanineninne 
