NO. 5 NEW MAMMALS FROM PANAMA GOLDMAN 3 



upper outline ; dentition similar, but relatively heavier, the premolar 

 series less widely spaced ; third upper molar nearly as large as sec- 

 ond (decidedly smaller in hcspcria). 



Measurements. — Type (measured in flesh) : Total length, 68 mm. ; 

 tail vertebrae, lo; tibia, i2.'/; hind foot, ii; forearm, 33.9. Skull 

 (type): Greatest length, 23.4; condylobasal length, 22.4; interor- 

 bital breadth, 4.6 ; breadth of braincase, 9.3 ; mastoid breadth, 9.8 ; 

 depth of braincase at middle, 6.9; palatal length, 12.3; length of 

 mandible, 16.8 ; maxillary tooth row, 8. 



Remarks. — In the general form of the skull this species is in all 

 essential respects like L. mordax and L. robusta and unlike L. hes- 

 peria in which the skull is relatively much narrower and more 

 elongated. The narrowness and C haeronycteris-liko. appearance of 

 the skull of L. hespcria has been pointed out by Mr. Gerrit S. Miller, 

 Jr.^ The greater relative as well as actual length of the rostrum 

 in hesperia leaves the third upper molar implanted well in front of 

 the maxillary processes of the zygoma as in the genus Chaeronyc- 

 teris instead of in the same horizontal plane with these processes 

 as in mordax and robusta. In the narrowness of the second upper 

 premolar, however, L. concava approaches hesperia, the conspicu- 

 ous inner lobe present in mordax and robusta being reduced to a 

 slight swelling bearing a small cusp. The coronoid process in con- 

 cava is somewhat intermediate in shape between the high angular 

 form seen in mordax and the low, broadly rounded upper outline 

 of hesperia. 



A small bat, Lionycteris spurrelU, from northwestern Colombia, 

 has recently been described by Mr. Oldfield Thomas and made the 

 type of a new genus characterized by the narrowness of the upper 

 premolars. L. concava may possibly require comparison with the 

 Colombian species which is based on an immature individual. But, 

 allowing for immaturity, the cranial dimensions given are so differ- 

 ent (greatest length, 18.7 in spurrelU, 23.4 in concava) that the spe- 

 cific identity of the two seems very improbable. 



Specimens examined. — One, the type. 



LUTRA REPANDA, new species 



Type from Cana (altitude 2,000 feet), eastern Panama. No. 

 179974, skin and skull, male adult, U. S. National Museum (Bio- 

 logical Survey Collection), collected by E. A. Goldman, May 30, 

 19 1 2. Original number 21758. 



^ Proc. U. S. Nat. Mus., vol. 42, No. 1882, p. 24, March 6, 1912. 



