252 PATAGONIAN EXPEDITIONS: PALEONTOLOGY. 



MEASUREMENTS. 



Type, P. altiramis. 



j, length oo 8 



" width oio 



Depth of jaw at ff 025 .025 



HAPALOPS GRANDIS Ameghino. 



Pseudhapalops grandis Amegh. ; Enum. Synopt. des Mamm. Foss. de 



Patagonie, 1894, p. 151. 



This appears to be a fairly well characterized species, despite its varia- 

 bility in certain respects ; it resembles the preceding one in the form of 

 the jaw, but is very much larger. The species is represented by three 

 specimens in the Ameghino collection and by a fourth in the La Plata 

 Museum. In the type T is of moderate size, in a second individual it is 

 smaller and more cylindrical, and in a third it is much compressed, the 

 cross-section suggesting the canine of a small machairodont. The pre- 

 dental beak of the mandible is longer than in H. forticulus, but otherwise 

 the shape of the jaw and the position of the postero-external dental fora- 

 men are much as in the latter. 



MEASUREMENTS. 



Lower dentition, length 045 Mandible, length from condyle 120 



" " " jj._ ? 029 " of predental beak 032 



T length (i. e., antero-posterior diameter) .006 depth below ^ 033 



" width (i. e., transverse diameter). ... .005 



HAPALOPS LONGITUDINALIS Ameghino. 



Pseudhapalops longitudinalis Amegh.; Rev. Argent, de Hist. Nat., T. I, 



1891, p. 319. 



Although known only from a single fragment of the lower jaw, this is 

 probably a valid species, unless it should prove to be merely an indi- 

 vidual abnormality. It is characterized by the very exceptional shape of 

 T, which, instead of being cylindrical or transverse, as it is in all of the 

 other known species of the genus, is elliptical with the major axis in the 



antero-posterior direction. 



MEASUREMENTS. 



Lower dentition, length ? _ T 0245 ff , width ... .008 



5-, length (i. e., antero-posterior diam- 3 , length 008 



eter) 007 " width 006 



2 , width (i. e., transverse diameter). . . .0085 Depth of jaw below 5 024 



j, length 0065 



