NO. 2 NEW MAMMALS FROM EASTERN PANAMA GOLDMAN IJ 



(= the vicinity of Chorrera, about \J miles southwest of Panama) 

 and only about 30 miles from Gatun. Huet's figures of the skull, 

 on the other hand, agree very well with the type of gabbi and on 

 geographic grounds might be expected to represent that species. 

 The skulls from Gatun and Chorrera agree with the type of gabbi, 

 and differ from the new form here described in the shorter postor- 

 bital processes, larger audital bullae and correspondingly narrower 

 basioccipital. B. richardsoni has long postorbital processes, but the 

 audital bulla? are large and the basioccipital narrow as in gabbi. 

 The new form may be not very unlike medius, but the latter is de- 

 scribed as having a smaller, lighter muzzle and rather smaller molars 

 than gabbi (therefore differing from orinomus). In addition the 

 long postorbital processes, broad basioccipital and small bulla 1 of 

 orinomus could scarcely have been overlooked and left unmentioned 

 by Thomas if present in his specimens of medius. Another apparent 

 peculiarity of the new form is a perforation, or transverse median 

 notch, in the fold of the basioccipital close to the foramen magnum. 

 This perforation is present in all the skulls examined, ranging in age 

 from that of a young individual in which the deciduous teeth are 

 being replaced by the permanent series to those of adults with worn 

 molars. In Bassariscyon the principal bones of the skull become 

 fused early in life ; with advancing age the temporal ridges become 

 prominent in the male, but apparently do not unite to form a sagittal 

 crest. 



Specimens examined. — Total number, 4, from the following lo- 

 calities in Panama: Cana (type locality), 3; Mount Pirri, 1. 



CRYPTOTIS MERUS, sp. nov. 



Type from near head of Rio Limon (altitude 4,500 feet), Mount 

 Pirri, eastern Panama. No. 178976, male adult, U. S. National 

 Museum (Biological Survey Collection), collected by E. A. Gold- 

 man, May 2, 19 1 2. Original number 21669. 



General' characters. — Member of the me.vicaua group similar to 

 C. orophila, but somewhat smaller; claws decidedly smaller; color 

 darker; skull high and narrow. 



Color. — Entire upper and under parts uniform glossy black; feet 

 dusky ; tail black all round. 



Skull.- — Slightly smaller than that of orophila, with much narrower 

 brain-case; interorbital region more depressed; large upper pre- 

 molar with antero-internal cusp less prominent; first and second up- 

 per molars relatively broader and shorter; third upper molar smaller, 

 the internal lobe weakly developed and unpigmented. 



