DESCRIPTIONS OF FIVE NEW MAMMALS FROM 



PANAMA 



By E. a. GOLDMAN 



Additional determinations of mammals obtained by the writer, 

 while assigned to the Smithsonian Biological Survey of the Panama 

 Canal Zone, reveal five hitherto unrecognized forms which are de- 

 scribed below. 



For the loan of types and other material for comparison I am 

 indebted to Dr. J. A. Allen of the American Museum of Natural 

 History, New York City, and to Mr. Samuel Henshaw of the Mu- 

 seum of Comparative Zoology, Cambridge, Massachusetts. 



CHIRONECTES PANAMENSIS, new species 



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

 179164, skin and skull, male, old adult, U. S. National Museum (Bio- 

 logical Survey Collection) ; collected by E. A. Goldman, March 23, 

 1912. Original number 21562. 



General characters. — Similar to C. minimus of Guiana in size and 

 color, but differing in cranial details, especially the longer braincase 

 and much longer, evenly tapering, and posteriorly pointed nasals. 



Color. — Color pattern about as in C. minimus, but light facial 

 areas apparently less distinct ; dark brown or black of forearms ex- 

 tending down over the thinly haired first phalanges of three median 

 digits, the terminal phalanges white or light flesh color as in mini- 

 mus; hairy base of tail dark all round. 



Skull. — Similar to that of C minimus, but braincase more elon- 

 gated, the well-developed lambdoid crest projecting posteriorly over 

 foramen magnum ; nasals longer, encroaching farther on frontal 

 platform, the ends pointed instead of truncate, and the sides not con- 

 stricted near middle ; ascending branches of premaxillae reaching 

 farther posteriorly along sides of nasals ; fronto-parietal suture con- 

 vex posteriorly; inner sides of parietals longer; sagittal crest well 

 developed. 



Measurements. — Type: Total length, 651 mm.; tail vertebrae, 

 386; hind foot, y2. Skull (type) : Greatest length, 74.2; condylo- 

 basal length, 72.3 ; zygomatic breadth, 43.8 ; length of nasals, 33 ; 



Smithsonian'Miscellaneous Collections, Vol. 63, No. 5. 



