258 PATAGONIAN EXPEDITIONS: PALAEONTOLOGY. 



MEASUREMENTS. 



Femur, width of distal end over condyles .049 Tibia, thickness of proximal end ....... 040 



" " " rotular groove ........ 025 " width of shaft in middle ......... 020 



Tibia, length ....................... 123 " thickness of shaft in middle ...... 015 



" width of proximal end ...... ... .050 " " " distal end .......... 022 



In addition to the foregoing species of Hapalops, which may be 

 regarded as more or less well defined, several species have been named, 

 concerning which I could arrive at no definite conclusion, either because, 

 at the time of my visit to La Plata, the types were inaccessible, or because 

 the material was insufficient for determination. In the following list of 

 these supposed species they are all referred to Hapalops, though some of 

 them may prove to belong to different genera. 



HAPALOPS ADTEGER Ameghino. 



Eucholceops adteger Amegh. ; Enumeracion sistematica, etc., 1887, p. 23. 

 Eucliolozops adteger Amegh. ; Contrib. al Conoc. de los Mam. Fos. de la 



Repub. Argent., 1889, p. 694. 

 Hapalops adteger Amegh.; Rev. Argent, de Hist. Nat., T. I, 1891, p. 



Eurysodon adteger Mercerat; Rev. del Mus. de La Plata, T. II, 1891, p ; 



20. 

 Hapalops adteger Amegh. ; Enum. Synopt. des Mamm. Foss. de Pata- 



gonie, 1894, p. 145. 

 Hapalops adteger Amegh. ; Sec. Censo de la Repub. Argent., T. I, 1898, 



p. 198. 



HAPALOPS CRASSIDENS Ameghino. 

 Hapalops crassidens Amegh.; Rev. Argent, de Hist. Nat, T. I, 1891, 



p. 136- 

 Hapalops crassidens Amegh. ; Enum. Synopt. des Mamm. Foss. de Pata- 



gonia ; 1894, p. 146. 

 Hapalops crassidens Amegh. ; Sec. Censo de la Repub. Argent., T. I, 



1898, p. 198. 



HAPALOPS DIVERSIDENS Ameghino. 



Hapalops diver sidens Amegh.; Rev. Argent, de Hist. Nat, T. I, 1891, 

 P- 



