LUTRA. LATAX. 4;!5 



postorbital processes greatly elongated ; braincase without crests, 

 rounded, and widest posteriorly; bullae small and flat, barely rising 

 above the level of the basioccipital ; pterygoid fossa broad for its 

 entire length, the sides nearly straight, but widening gradually to 

 tips of pterygoid processes where the width is greatest; upper molars 

 veiy large, the cusps on exterior side very high and acute; last molar 

 square-shaped, slightly widest on interior edge. 



Measurements. Skull: total length, 122; Hensel, 107; zygomatic 

 width, 81; intertemporal constriction, 20; width across postorbital 

 processes, 40; width of rostrum at canines, 30.5; palatal length, 55; 

 length of upper tooth row, anterior edge of canine to posterior edge 

 of last molar, 40; length of nasals, 17.5; total length of mandible, 

 angle to tips of incisors, 76; length of lower tooth row, anterior edge 

 of canine to posterior edge of last molar, alveolar border, 46 ; length 

 of canine, 13 • length of lower carnassial, 15. 



1051. Lutra annectens Forsyth-Major. 



Liitra annectens Forsyth-Major, Zool. Anzeiger, xx, 1897, p. 142, 

 Elliot, Mamm. Middle Amer. & W. Indies, F. C. M. Pub., iv, 

 Pt. II, 1904, p. 536, pi. LI. Zool. Ser. 

 Cextr.\l Americax Otter. Nutria in Costa Rica. 



Type locality. Rio de Tepic, Territorio de Tepic, State of Jalisco, 

 Mexico. 



Geogr. Distr. Mexico to Costa Rica. Limits of range unknown. 



1052. Lutra degener Bangs. 



Lutra degener Bangs, Proc. Biol. Soc. Wash., xii, 1898, p. 35. 



Elliot, Syn. X. Am. Mamm., F. C. M. Pub., 11, 1901, p. 353. 



Zool. Ser. 

 Degenerate Otter. 



Type locality. Bay St. George, Newfoundland. 

 Geogr. Distr. Newfoundland. 



Genus 132. J^atax. Sea Otters. 

 Latax Gloger, Nov. Acta Phys. Med. Acad. Caes. Leopol. -Carol., 

 XIII, Pt. II, 1827, p. 511. Type Liitra marina Erxleben = 

 Mustela lutris Linnaeus. 

 Pusa Oken, Lehrb. Naturg., Theil iii, 2te Abth., 1816, p. 986. 



(nee Scopoli.) 

 Enhydra Flem., Philos. Zool., 11, 1822, p. 187. (nee Enhydris 

 Merrem, Rept.) 



1053. Latax lutris (Linnaeus). 



Mustela lutris Linn., Syst. Nat., i, 1758, p. 45; i, 1766, p. 66. 

 Lutra marina Erxl., Syst. Regn. Anim., 1777, p. 445. 



