536 



LUTRA. 



FIG. LXXVI. LUTRA c. SONORA. MEXICAN OTTER. 



Genl. Char. Size large; hind foot long. Postorbital processes of 

 skull slender, attenuate; no diastema between ist and 2d premolars. 



Color. Above dark brown, changing to pale grayish brown below, 

 being whitish on under sides of head and neck ; the hairs on head and 

 neck above tipped with yellowish brown. 



Measurements. Total length, 1300; tail vertebrae, 472; ear, 15. 

 Skull: occipito-nasal length, 88.6; greatest zygomatic width, 73.2; 

 basal length of Hensel, 96; palatal length, 48. 



506. annectens (Lutra), Forsyth-Major, Zool. Anzieger, xx, 1897, 



p. 142. Id. Ann. Mag. Nat. Hist., 6th Ser.,xix, 1897, p. 618. 

 CENTRAL AMERICAN OTTER. Nutria in Costa Rica. 



Type locality. Rio de Tepic, Terrotorio de Tepic, Mexico. 



Genl. Char. Premolars small, slender; diastema between first 

 and second lower premolars; superior outline inclining downward 

 anteriorly, not straight; bullae less flat than those of L. canadensis; 

 inferior mandibular margin straight. 



Color. Not given. 



Measurements. Skull: basal length, 97.8; greatest breadth, 75.1; 

 palatal length, 45.9-46.5. 



