126 PROCEEDINGS OF THE ACADEMY OF 



in the extinct animal, as in the Lama and Camel, allowed a greater spread or 

 divergence of the toes in the extended condition. The fossil bone is 19 inches 

 long; the breath of its proximal end is 3i inches, of its distal end 4 inches. 

 In the skeleton of a Camel in our museum, the corresponding bone is 13 

 inches long. 



2. The distal extremity of another metacarpal of the same animal. 



3. The proximal end of a femur, probably of the same animal, with the 

 head of the bone 3 inches in diameter. An acetabulum of corresponding size 

 appears to have belonged to the same individual. 



4. Two fragments of a tibia probably of the same animal. 



The bones mentioned probably represent a large extinct species of Lama, 

 which may be distinguished with the name of Auchexia Califorxica. Perhaps 

 the fossils represent a distinct genus, allied to the Lama, but this is a ques- 

 tion only to be determined by the discovery of other and more characteristic 

 remains of the animal. 



5. A first phalanx, in the collection, resembles in form that of a represent- 

 ation of the same bone in the Lama, and is about the size of that in the 

 Camel. Perhaps it belongs to a small individual of the preceding extinct 

 form; probably to a smaller species. It is 3J inches long, Ij inch wide at 

 the proximal end, and l inch wide at the distal end. The articulation of 

 the latter is not expanded beneath, as in the Camel, for the apposition of the 

 sesamoid bones. 



6. The proximal three-fourths of a metacarpal, probably of a Deer. It is 

 of rather more robust proportions than the corresponding bone of the Virgi- 

 nia Deer. 



7. An incisor tooth of a small Horse, partially imbedded in a coherent 

 mass of gravel, which also contains the impress of a nut-like fruit. 



8. Portion of a tibia of a small Horse, probably pertaining to the same 

 individual as the tooth just mentioned. 



9. The lower extremity of a metacarpal, probably of the same Horse. It 

 is proportionately thicker and less wide than in the corresponding bone of 

 the Domestic Horse. The articulation is \h inch wide, and 16 lines fore and 

 aft at the median ridge. 



The equine remains perhaps belong to a Hipparion. 



10. A few fragments of undetermined bones of other animals. 



Prof. Leidy further directed attention to a fossil fragment of the lower jaw 

 of a small pachyderm, which Prof. Hayden had obtained from Henrj's Fork 

 of Green River, Wyoming. The specimen contained the fourth, the sixth and 

 the seventh molars. The teeth resemble in form and constitution those of 

 the Lop Mother turn cervulum, a small pachyderm, described by Prof. Gervais, 

 from an eocene formation of France. The crowns of the fourth to the sixth 

 molars have four lobes ; that of the seventh molar has an additional lobe. 

 The crescentic summit of the postero-external lobe joins, by its anterior horn, 

 the antero-internal lobe. A proportionately well developed basal ridge em- 

 braces the crowns, except internally, where it is entirely absent. The series 

 of the back four molars occupies a space of 16 lines. The last molar is Sp- 

 lines fore and aft. The base of the jaw is nearly straight the length of the 

 fragment, which is an inch and a half. The depth of the jaw below the fifth 

 molar is half an inch. The species may be named Lophiotherium sylva- 

 ticum. 



Prof. Leidy also remarked that the Philosophical Transactions of the Royal 

 Society of London, Pt. II, 1869, presented this evening, contained a paper by 

 Prof. Owen, on the fossil remains of Equities from Central and South Ame- 

 rica. It was of special interest to him on account of its being accompanied 

 with excellent illustrations of the dentition of the various species of existing 



[Nov. 



