45 2 Bulletin American Museum of Natural History. [Vol. XX, 



46. Lutra colombiana, sp. nov. 



Type, No. 15479, ? ad., Bonda, Santa Marta district, Colombia, 

 August 18, 1899; coll. Herbert H. Smith. 



Color above pale reddish brown (between Prout's brown and hair 

 brown of Ridgway) ; below pale grayish brown, the hairs and fur 

 very pale brown basally, the hairs with long yellowish white or soiled 

 white tips. Nose pad with the upper border double-concave, the 

 lower border straight; transverse width, 15 mm., vertical width, 10. 



Total length (type), 979; head and body, 547; tail vertebrae, 432; 

 hind foot, 96. Two other adults are slightly smaller, the three speci- 

 mens measuring: Total length, 966 (934-997); head and body, 555 

 (547-565); tail vertebrae, 411 (387-432).^ Skull (type), basal length, 

 101; zygomatic breadth, 67. (For detailed measurements see table 

 below.) 



Represented by 4 specimens: i skin and skull, 2 skins with skele- 

 tons, and i skeleton, all from Bonda, taken in February, August, and 

 November. All are adult; two are sexed as females, while the sex of 

 the others is not indicated. They differ little in color, but in the 

 November specimen the pelage is longer, softer, and thicker than in 

 the others. 



CRANIAL MEASUREMENTS OF OTTERS. 



1 All from Bonda (Santa Marta), Colombia; coll. H. H. Smith. 

 ! Princestown, Trinidad; coll. Frank M. Chapman. 



3 Laguna de Juanacatlan, Jalisco, Mexico ; coll. Dr. A. C. Buller. 



4 Diagonally from the antero-internal point of lobe to postero-outer angle of tooth. 



