nh 
1884.) Anatomy and Physiology of the Family Nepide. 353 
acus. The typical and largest species, C. pelvidens Cope, is from 
the Puerco Eocene of New Mexico; the smallest species, C. an- 
gulatus Cope, is from the Wasatch beds of New Mexico and Wy- 
oming (Fig. 14). Perhaps it is near this genus that Tricentes 
Cope, should be placed. The latter only differs from Chriacus in 
the possession of but three superior premolars.’ I have sus- 
pected that it belongs near Microsyops and Mixodectes in the 
Lemuroid series. There are three species, none larger than a 
skunk. The type, T. crassicollidens, is known from parts of two 
crania. The T. ineguidens was not larger than a gray squirrel. 
The Deltatherium fundaminis Cope (Fig. 20), is one-half larger 
than the Virginian opossum, and much more robust. Its molar 
teeth are very opossum-like, while its canine teeth are relatively 
larger and stouter. The crowns of the canines are especially 
effective as weapons, from their vertical direction and form, their 
sharp anterior and posterior cutting edges, and their sides grooved 
like many blood-letting instruments. The sagittal crest is high, 
and the muzzle is short and wide, so that a decidedly bull-dog 
expression belonged to this animal. It is the most specialized 
form of the family and of the Puerco epoch, and was one of the 
most abundant. There are two other less known species of Del- 
tatherium. 
(To be continued.) 
ANATOMY AND PHYSIOLOGY OF THE FAMILY 
NEPID. 
BY WILLIAM A. LOCY. 
(Continued from page 255.) 
The Salivary Glands.—The most anterior appendages to the 
alimentary canal are the salivary glands. These are especially 
iia ea ay eee ee 
‘wo pairs, each pair consisting of a small gland and a large one, 
ag by ducts near the commencement of the cesophagus. 
86 large glands, which are about five times the length of the 
Pan ones, extend back to the first abdominal segment, and are 
"e united to the stomach by threads of tracheæ. At the ante- 
"Mii of the large glands are two round pouches, which prob- 
r the storage of small quantities of saliva. 
OM. American Philosoph. Society, 1883, p. 315- 
be XVIIL—no, rv. as 
