296 



HODOMYS. 



59. Hoclomys. 



Hodomys Merr., Proc. Acad. Nat. Scien. Phil., 1894, p. 232. Type 

 Neotoma alleni Merriam. 



Cranium long, narrow; squamosal and supraoccipital articulating; 

 bullae small, narrow anteriorly, shorter than molar series; pterygoid 

 fossa longer than broad; basioccipital broad; spheno-palatine vacui- 

 ties closed; mandible broadly expanded posteriorly; first and second 

 upper molars with four roots each, and the enamel fold on inner side 

 divides the middle transverse loop ; three roots on third upper molar ; 

 third lower molar with two salient and one reentrant angle on each 

 side, and with or without an antero-external vertical sulcus. 



FIG. 50. HODOMYS ALLENI. 



No. 5021 Field Columbian Mus. Coll. Nat size 



