MAMMALS—LUTRINAE—ENHYDRA MARINA, 189 
ENHYDRA, Fleming. 
** Enhydra, Fiemine, Philos. Zool. 11, 187.” 
‘* Enydris, Licur. Darstellung, &c. 
Sp. Cu.—Fore feet, fin-like in shape ; anteriorly four-lobed ; the lobe next to the outer longest, with two claws above ; hind 
toes becoming shorter from the fifth to the first. 
The sea otter, the sole representative of the genus as far as known, is an exceedingly remark- 
able animal, with perhaps more resemblance to a seal than to the common otters. The head is 
short and very broad; the nose obtuse, with a naked mufille, and with three rows of stiff horny 
bristles. The digits of the fore feet are very short and firmly bound up in a thickened membrane, 
which on the palmar surface is naked and granular. The hand is divided into four lobes, 
representing the digits, excepting the third and fourth, which are bound together and bear two 
claws above. The hind feet have the outer toes the longest, the rest descending from the fifth 
to first ; the under surface hairy, except under the balls of the toes The hind feet are directed 
‘much further backwards than in the common otters, in this respect resembling the seals, except 
that in the latter the hind feet are crescentic in shape, owing to the middle toes being shorter 
than the lateral. 
The skull and teeth of the sea otter differ very appreciably from those of the true otters, and 
well substantiate the generic separation of the two. The first small premolar of the upper jaw 
on either side is wanting, making the total number two less, or thirty-four in all. 
ENHYDRA MARINA. 
Sea Otter. 
* Lutra marina, STELLER, Noy. Comm. Petrop. II, 1751, 367; tab. xvi.’’ 
Erx.esen, Syst. 1777, 445. 
Scureser, Saugt. III, 1778, 465; pl. exxviii. 
Desmarest, Mam. J, 1820, 189. 
Hartan, F. A. 1825, 72. 
Gooman, Am. N. H. I, 1831, 228. 
Waener, in Wiegm. Archiv, 1836, II, 281. 
*© Enhydra marina, Fitemine, Phil. Zool. If, 1822, 187.” 
GrirrF. Cuv. V, 1827, 132. 
Martw, Pr. Zool. Soc. [V, 1836, 59. (Osteology.) 
Aun. & Bacn N, A. Quad. III, 1853, 170; pl. exxxvii. 
Enydris marina, Licut. Darst. Sdiugt. 1827, 34; tab. xlix, 1. 
Erman, Reise um die Welt ; tab. xi, xii. 
“* Wacener, Gelehrte Anzeige, I, 555.’’ 
Wacner, Suppl. Schreb. II, 1841, 274. 
Latax marina, Lesson, Nouv. Tabl. R. A. 1842, 71. 
Mustela lutris, Linn. Syst. Nat. I, 1766, 66. 
Gm. Syst. Nat. I, 1788, 92. 
Phoca lutris, Pauias, Zoog. Rosso-As. I, 1831, 100. 
Lutra lutris, F. Cuy. Suppl. Buff. I, Mammif. 1831, 204. 
Enydris stelleri, (‘‘ Lesse Man.”’) Fiscuer, Syn. 1829, 229. 
Enxdris gracilis, Fiscuer, Syn. 1829, 229. 
Sea otter, Pennant, Hist. Quad. 1781, No. 230.—Is. Arctic Zool. 1. 
1784, 88. (Leverian Museum.) 
