220 L. Agassiz on 
and slightly forwards almost to meet the first bend, when it 
turns backwards again, and ends in a straight course at the 
anus. The stomach cannot at all be distinguished externally 
from the small intestine by its size and form. There are no 
cecal appendages at all in any part of the intestine. The 
whole alimentary canal contained large numbers of shell frag- 
ments of small Mytili. The liver has two lobes, a short one 
on the left side, and a long one along the middle line of the 
body. 
The female genital apparatus, in the state of pregnancy, 
consists of a large bag, the appearance of which in the living 
animal has been described by Mr Jackson ; upon the surface 
of it large vascular ramifications are seen, and it is subdivided 
internally into a number of distinct pouches, opening by wide 
slits into the lower part of the sac. This sac seems to be 
nothing but the widened lower end of the ovary, and the 
pouches within it to be formed by the folds of the ovary itself. 
In each of these pouches a young is wrapped up as in a sheet, 
and all are packed in the most economical manner, as far as 
Saving space is concerned, some having their head turned 
forwards, and others backwards. This is therefore a normal 
ovarian gestation. The external genital opening is situated 
behind the anus, upon the summit and in the centre of a coni- 
cal protuberance formed by a powerful sphincter, kept in its 
place by two strong transverse muscles attached to the abdo- 
minal walls. The number of young contained in this sac 
seems to vary. Mr Jackson counted nineteen; I have seen 
only eight or nine in the specimens sent by Mr Cary, but 
since these were open when received, it is possible that some 
had been taken out. However, their size is most remarkable 
in proportion to the mother. In a specimen of Emb. Jack- 
soni, 103 inches long, and 43 high, the young were nearly 
3 inches long, and 1 inch high; and in an Emb. Caryi, 
8 inches long, and 3} high, the young were 2% inches long, 
and {ths of an inch high. Judging from their size, I sus- 
pected for some time that the young could move in and out 
of this sac like the young opossums, but on carefully ex- 
amining the position of the young in the pouches, and also 
the contracted condition of the sphincter at the external ori- 
oS? ae , eS a 
