156 Transactions.— Zoology. 
(Esophagus (fig. 1c).—The buccal mass narrows into the cesophagus, 
which passes through the nerve-collar and peri-csophageal cartilaginous 
ring, and is continued to the stomach without ingluvial dilatation. It 
dilates slightly as it enters the stomach. 
Stomach (fig. 1m).—The stomach is saccular and thick-walled. It 
shows two slight constrictions. The walls present on their inner surface 
strong longitudinal plice, which are prolonged into the intestine, and con- 
tinue throughout its length. 
Lying within the stomach is a loose tunic or sac with thick, though 
almost transparent, walls, showing longitudinal plicw or corrugations. It 
has a wide orifice at one end, and at the other is thin or open. I have not 
been able to discover that it has any organic connection with the walls of 
the stomach, but as I have found it in all the specimens I have examined, I 
do not think its occurrence can be accidental. 
The pyloric opening is at the lower end of the stomach and close to the 
cardiac opening. The commencement of the intestine is shown by a well- 
marked constriction. Neither cardiac nor pyloric opening is protected by 
a valve. 
Pyloric cecum (fig. 1n).—Immediately following the constriction there 
is given off a long cecal dilatation with thin but tough transparent walls. 
It expands at its attached end and tapers gradually to its opposite rounded 
extremity. When in sitú it forms a half curve round the stomach. As will 
be presently noticed, the hepatic ducts open into this cecum. On the 
broadest part of its wall, at the attached end is a circular coat formed by a 
radiating mass, whose nature I have not discovered. 
Intestine (fig. 1h).—From the pyloric cwcum the intestine narrows : 
gradually until the anus is reached. At somewhat less than half the 
distance between the cecum and the anus it is folded over so as to 
form a distinct flexure. The anus has two stalked and leaf-like lateral 
valves. 
Ink-sac (fig. 1h).—The ink-sac is large and broad. Its highest and 
broadest part lies near the intestinal flexure, and from this part it narrows 
to its opening into the anus, Its coat is silvery and, in places, iridescent ; 
and the dark sepia shows through the sac-walls. Throughout its length 
it is held closely to the intestine by a membrane. 
Liver (fig. 1 f).—The liver is large, extending from immediately above 
the cephalic cartilage for about two-thirds of the length of the cesophagus. 
It is encased in a capsule showing under the miscroscope close fibres and 
yellow concretions. The liver itself is loose, and under the microscope shows 
clustered follicles and interlacing tubes with abundant yellow concretions. 
The bilobed condition is not observable. | 
