1889.] ON A NEW SPECIES OF HYRACODONTOTHERIUM. 67 
2. On an apparently new Species of Hyracodontotherium’. 
By R. Lyprxxer, B.A., F.Z.S., F.G.S., &c. 
[Received January 26, 1889.] 
In 1877 Dr. H. Filhol? described and figured the left half of the 
palate of a comparatively small Ungulate under the name of Hyraco- 
dontotherium*® primevum, the specimen having been obtained from 
the Upper Eocene (Lower Oligocene) Phosphorites of Central France. 
This specimen showed the typical Eutherian dental formula, the 
last two incisors and the third and fourth premolars being, however, 
represented only by their alveoli. The chief features connected 
with the dentition are, firstly, that the incisors are placed nearly in 
the same antero-posterior line, after the fashion of those of a Pig, 
and that the first incisor is a comparatively large tooth, much curved, 
and with a convex anterior and a flattened posterior surface. This 
tooth presents, indeed, a decided resemblance to that of Hyrax. 
There is no diastema behind the third incisor, and the canine is a 
small trenchant tooth, not unlike the last incisor. The anterior pre- 
molars have elongated, subtrenchant crowns, while the alveolus of 
the fourth premolar indicates the crown of that tooth to have 
been triangular and of simpler structure than the true molars. The 
latter are of a lophodont type, recalling those of the Perissodactylate 
genus Chalicotherium. 
In his description Dr. Filho! made no attempt to determine the 
serial position of this peculiar genus, merely remarking that it ap- 
peared to show certain resemblances to Anoplotherium and Hyraw. 
In 1886 Dr. M. Schlosser* stated that Hyracodontotherium was 
evidently closely allied to the N.-American Eocene genus Menisco- 
therium, and inclined to the opinion that both were allied to Chalico- 
therium, although the entepicondylar foramen in the humerus of 
the American genus indicated affinity with the typical Condylarthra 
of Prof. Cope. By the latter writer’ Meniscotherium is indeed 
made the type of a family of Condylarthra characterized by its 
specialized lophodont dentition. . 
So far as I am aware the above constitutes the literature of 
Hyracodontotherium. 
HyRrACODONTOTHERIUM FILHOLI, 0. Sp. 
During last year the Natural History Museum acquired by purchase 
the specimen represented in the accompanying figure (p. 68), which 
was obtained from the Phosphorites of Bach, near Lalbenque, Lot, 
and evidently belongs to Hyracodontotherium. The specimen com- 
prises a considerable part of the left half of the palato-facial region 
1 The name was published as Hyracodontherium, which should clearly be 
amended as above. 
* Ann. Sci. Géol. vol. viii. art. 1, p. 158, pl. xiii. figs. 288, 284. 
® The plate is erroneously lettered Hyracodon. 
* Morphol. Jahrb, vol. xii. p. 21. 
° Rep. U.S. Geol. Sury. Terr. vol. iv. p. 493 (1884). 
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