284. SIR ©. ELIOT AND T. J. EVANS. 
of the cesophagus. Neither contained any solid food in any 
specimen. ‘The intestine (fig. 6, d) issues from the mid- 
dorsal surface of the second division and, after describing a 
broad loop backwards and downwards, runs to the anal 
opening, which is an inconspicuous papilla on the right side, 
lying below the mantle edge and just at the point where it 
joins the body. The loop of the intestine bears a single longi- 
tudinal ridge resembling the typhlosite found in Lumbricus. 
The stomach receives three hepatic ducts: one on the right 
(fig. 6, e), close to the exit of the intestine; one on the left 
(fig. 6, g), not quite opposite to it, but a little posterior; and 
one behind (fig. 6, f). The posterior and left ducts bifurcate 
close to the stomach and then ramify into branches composed 
of follicles which are not only found in the body cavity but 
enter the body wall and dorsal integuments, extending to 
within a short distance of the mantle brim. The arrangement 
and extent of the right duct is essentially the same, but the 
follicles are developed more luxuriously on this side than on 
the left, and the bifurcation is less clear, although the duct 
runs in two directions, backwards and forwards. The right 
and posterior branches anastomose, but though the right and 
left branches almost meet anteriorly they seem not to com- 
municate, nor do the posterior and left branches. All three 
branches consist of variously shaped follicles communicating 
with one another, so as to offer a continuous passage but not 
forming a cylindrical tube except in the main ducts, For 
some distance from the point of entry into the stomach 
the walls of the main duct bear folds which dovetail into one 
another in the middle of the lumen and form a valve or 
strainer. 
The cells which line the hepatic lobules are columnar or 
cubical and highly granular. Some are in a distended condi- 
tion, others are attached to the wall of the lobule only by a 
strand or are free in its cavity. It would seem, therefore, 
that some of the liver cells are excretory in function, and are 
dropped into the follicle as they become extended with 
excreted material, . 
