286 
PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 
A calcaneum in the Princeton collection (No. 15,213), which I refer to 
this species, has the following dimensions : 
Calcaneum, length .... .187 Calcaneum, distal thickness . . . .062 
proximal width . . . .076 “ cuboid facet, transv. diam. .034 
thickness . . .067 “ “ “ dors. -plant, 
distal width . . . .046 diam. ...... .049 
Localities. — Not given for the type specimen. No. 15,213 was 
found by Mr. Hatcher on the coast, ten miles south of Coy Inlet. 
DIOROTHERIUM Ameghino. 
Diorotherium Amegh.; Rev. Arg. de Hist. Nat., T. I, 1891, p. 296. 
The original description, in which there is no discrimination of generic 
and specific characters, may be reproduced in somewhat abbreviated 
form. “Distinguished from Homalodontotherium by the absence of p-; 
a diastema between the canine and p- ; canine very large and with 
strong vertical striations ; true molars with strong external and internal 
cingulum. Occipital and parietal crests more elevated ; skull of more 
slender form, considerably narrower and higher than in Homalodontothe- 
rium; forehead and nasal opening much narrower.” To this was 
subsequently added the statement that the humerus possessed an 
entepicondylar foramen. (Amegh., ’94", 67.) 
Obviously this genus is of very doubtful validity, but it may be 
allowed to stand pending the discovery of more adequate material. 
Diorotherium egregium Ameghino. 
Diorotherium egregium Amegh.; Rev. Argent, de Hist. Nat., T. I, 1891, 
p. 296. 
Length of skull from canine to occipital condyles, inclusive, .420 ; 
height of skull from the masticating surface of m- to dorsal side of nasal, 
.170. The height and narrowness are partially, at least, due to 
lateral compression. 
Localities. — Not given. 
