340 A. E. VerriU — North. American Cephalopods. 
the ventral border of the laminae. Parallel with these arise small, 
capillary, efferent vessels, which join larger transverse vessels, between 
and parallel with the afferent ones; these in turn join the larger effer- 
ent vessel that runs along the ventral edges of the laminae, and these 
marginal vessels pour their contents into the large branchio-cardiac 
vessel (ho) which runs along the middle of the gill, on the ventral 
side, and carries the purified blood to the heart. 
The buccal membranes, the pharynx, with its horny jaws, the 
odontophore, armed with seven rows of recurved teeth on the radula, 
and the thin, chitinous, lining membrane, which has numerous 
sharp, scattered, recurved teeth, both on the palate and in the throat, 
have already been described (pp. 311, 312). The (esophagus is a 
long, narrow, but dilatable tube, having two oblong salivary glands 
attached to it, within the bilobed anterior end of the liver (l); it then 
runs backward in a groove along the dorsal side of the liver, to a 
point beyond its middle, where it passes obliquely through the liver, 
accompanied hy the aorta ( ao ), and dorsally enters the stomach (£). 
The stomach consists of three parts, which are often sufficiently dis- 
tinct externally, when the stomach is empty, or nearly so, but when it 
is greatly distended with food (as often happens), the apparent divis- 
ions almost disappear and the whole becomes one great, long-pyriform 
sac. The first division (.S') or ‘ true stomach,’ is plicated internally 
and has thickened glandular walls. It is supplied with blood by a 
conspicuously ramified vessel, the gastric artery (so). This lobe of 
the stomach is sometimes contracted into a firm glandular mass, 
strongly constricted where it joins the more saccular second stomach; 
but I have seen specimens greatly distended with food in which it 
was scarcely or not at all distinguishable as a lobe, and seemed as thin 
and saccular as the other parts. The remainder of the stomach (S') 
usually has the form of a long, more or less swollen, ovate sac, 
tapering backward to a somewhat acute posterior end, which reaches 
back nearly to the end of the body ; anteriorly its most swollen 
portion is about opposite the junction with the first stomach, and 
just behind the heart; from this swollen portion it narrows rapidly, 
but extends forward along the posterior part of the liver, above and 
in advance of the heart, where it gives off the intestine. The 
more swollen anterior portion (k), of this sac, the second stomach, 
has a glandular lining and is distinctly radially plicated, and is, there- 
fore, clearly anatomically distinguishable from the thin and non-pli- 
cated posterior portion, or ccecal lobe, (S') which seems to serve 
mainly for the temporary storage of large quantities of food. 
