70 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Digestive System. 
The digestive system of Typlilomolge corresponds very closely to 
those of the other Urodeles. 
The mouth is provided with three sets of teeth: the premaxillary 
row, the vomero-palatine row, and the mandibular row; it contains 
the tongue which is free at the anterior border. It opens posteriorly 
into the wide pharynx, which in turn narrows into a thin-walled 
esophagus. The esophagus is long, extending posteriorly to the 
middle of the coracoids where it widens into the stomach. Its 
inner surface is much folded. 
The stomach is large and cylindrical with thicker muscular walls, 
and extends half way to the cloaca. Its width is about one fifth of 
its length. It is partially covered ventrally throughout its length 
by the liver, a large, well developed, whitish organ, apparently free 
from pigment. 
Connected with the posterior portion of the liver is a small gall¬ 
bladder from which the hepatic duct passes to the intestine, near its 
junction with the stomach. On the dorsal wall of the stomach lies 
a small tliree-lobed pancreas with a duct that opens into the intestine 
near the hepatic duct. The stomach contained a partially digested 
mass in which were found the head and thorax of an unknown 
grasshopper, with very large eyes, and a worm, closely resembling 
an Acantkocephalus, although no hooks were visible. 
The posterior part of the alimentary canal is a large, slightly 
coiled intestine, nearly twice as long as the stomach. This opens 
posteriorly into the large rounded cloacal chamber, which lies on the 
dorsal surface of the pubo-ischium. The urogenital system also 
opens into this chamber. Its external orifice is a longitudinal slit 
immediately posterior to the pelvic girdle in the mid-ventral line. 
This is nearly surrounded by a glandular mass, lying between the 
two ischio-caudal muscles. 
Ductless Glands. 
Sections of the head reveal the presence of a thymus gland, but 
I do not find thyroids. The thymus here, as in the Spelerpes larva, 
is subcutaneous and dorsal to the gill bushes. 
The spleen lies slightly dorsal to the middle third of the stomach. 
