258 The American Geologist. ‘April, 1892 
In the Oregon maxillary, the posterior palatal foramen ‘issues 
opposite the. fourth premolars internal root.” In the Huerfano 
specimen, it opens opposite the anterior part of the posterior root 
of the first true molar, or opposite the middle of the molar. 
In comparing the Huerfano specimen with Leidy’s type of A. 
hesterna, it will be noticed that the fourth inferior premolar in the 
former is, relatively to the adjacent first molar, larger than in the 
latter, and that, in form, it more closely approximates a triangu- 
lar prism or wedge; features which are apparently only in part 
due to the somewhat more worn condition of the premolar of the 
Huerfano specimen, by reason of which condition, however, the 
lacuna of the grinding-surface is closed instead of being open 
posteriorly as in hesterna. 
The strongly recurved posterior fifth lobe of the last upper 
molar, in the Huerfano specimen, is but moderately developed; 
for, though the tooth has reached a more advanced stage of wear 
than has the last /ower molar of Leidy’s type of hesterna, it does 
not contribute to the area of the grinding-surface, but becomes 
obsolete before reaching the plane of the latter. 
“Whatever may be the final generic disposal of the Californian 
hesterna, and of the Oregon desert maxillary, the present speci- 
men is a true Anchenia. It lacks, however, the ‘‘compression- 
folds” seen on the lower molars of recent llamas. Its size was 
closely approximate to that of (?Holomeniscus) hesterna, from 
which the available data indicate that it is probably distinct. The 
species may be known as Auchenta huerfanensis. 
| append the following measurements: 
Inches. 
Mandible, from symphysis to posterior border eee 15. 
taken at three inches below infra-condylar hook). . 
Elevation of summit of coronoid process above in- i 
feriorborderjofamandibies--er eee eee eee Reser a 
Depth of mandible at postsymphyseal constriction.... 1.8 
Same at posterior edge of alveolusof first true molar.. 2.8 
Inferior post-canineydjastems cea eiieeeine eri 3.8 
Antero-posterior diameter of sea surface of sec-} 5 
ond ‘true molatiii4 2.5 SAW ae eete ae ce ee eae eee 
Transverse diameter of same ....... Botrocoe ivan, pees 
Antero-post. diam. grind’g surf. third true molar. echoes 15 
Transverse diameter ‘of Samie. .. 22... case sean ee eee 1.18 
Major diameter of acetabulum.............. sic sie 2.15 
Minor diameter of acetabulum. Siaialelatore sietsin BROCE verb 
Breadth of cannon-bone at distal extremity eee se fe 
Length of first phalanx. {02 .coc, eee 4.4 
3readth of same at proximal extremity MG oa UC IRE aod 1.62 
sreadth of same at distal extremity........... soaenoc 1.25 
