396 



R. 8. Lull — Neiv Camels in 



erupted, M^ was not in nse although fully visible in the 

 jaw, and both upper and lower third molars are not 

 formed. 



Distinctive characters. — Skull small, very slender, 

 muzzle elongated. Facial vacuity apparently present. 

 Deep depression on either side of face in maxillary, the 

 pre-orbital pit, preceded by a slight swelling, the infra- 

 orbital foramen over P^. Premaxillaries very delicate, 

 extending back to above P- and forming an extensive 

 union with the nasals. 



Upper deciduous incisors small, somewhat spatulate, 

 and spaced. Deciduous canine isolated by long diaste- 

 mata. The small, apparently permanent first premolar is 



/oo&o. Y. p. M. 



Fig. 2. — ParatylopKS cameloides (Woitman) 

 right aspect. X 3/5. 



Juvenile. Skull and jaws, 



also isolated, its crown not fully erupted ; it is triangular, 

 trenchant, and apparently double-rooted. Dp- to M- 

 form a continuous series with prominent external styles 

 and buttresses, especially upon the molars. Dp- simple, 

 laterally compressed, with one prominent cusp, flankecl 

 anteriorly by a lesser one, externally supported by a 

 buttress. Dp-^ elongate, irregularly triangular, with one 

 anterior and two posterior crescents. Dp^ molariform, 

 with a small internal pillar and prominent mesostyle. 

 Molars tending toward h^qDsodonty, M^ with small inter- 

 nal pillar and strong parastyle, mesostyle, and .external 

 buttresses. 



The apparently deciduous inferior incisors and canine 

 form a continuous series without diastema, are spatulate 

 and procumbent. Canine incisiform, somewhat smaller 



