TRIOHECUS. MAMMALIA. 107 



P. coronata, Blain. (Otaria coronata, Desm.) Fur black, with 

 yellow spots ; a yellow band on the head and a spot on the muz- 

 zle ; hind feet with five claws. 



P. cinerea. (Otaria cmerea, Peron, Desm.) Fur ash-coloured, thick 

 and rigid. Coast of New Holland. 



P. albicollis. (Otaria albicollis, Peron, Desm.) Fur with a large 

 white spot on the top of the back. New Holland. 



P.jlavescens, Shaw. (Otaria flavescens, Desm.) Fur of a pale yel- 

 low ; no nails apparent on the fore-feet ; the hind feet with claws. 

 Straits of Magellan. ^a/y i. pi. 73. 



P. Falklandica, Shaw. (Otaria Falklandica, Desm.) Fur ash-co- 

 loured, shaded with white ; fore-feet clawless ; hind feet with four 

 claws. Inhabits Falkland Islands. 



Gen. 80. TRICHECUS, Lin. Cuv. Desm. 



Incisors , canines -, molars f-f = 24. Incisors small, 

 deciduous; superior canines or tusks of large size, longer 

 than the head, compressed laterally and arched ; molars cylin- 

 drical, crown truncated obliquely ; body elongated ; head 

 round ; muzzle large ; no external ears ; tail very short ; fore- 

 feet like fins, with five toes ; hind feet horizontal ; toes enve- 

 loped in the skin. 



T. rosmarus, Gmel. (7". manatus, Lin.) The Morse. Lips very thick; 

 bristles rigid ; hair very thin, short, reddish ; two enormous ca- 

 nines projecting downwards. Northern Ocean. Shaw, i. pi. 78. 

 The Morses or Walruses are animals of very large size, sometimes eighteen feet long, 

 and closely resemble the Phoca in their mode of life. They inhabit similar places, and 

 are generally found together. They are gregarious animals, and are sometimes seen 

 in vast multitudes on masses of floating ice in the Northern Seas. " They lie," says 

 Captain Cook, " in herds of many hundreds upon the ice, huddling one over the other 

 like swine, and roar or bay very loud, so that in the night, or in foggy weather, they 

 gave us notice of the ice before we could see it. We never found the whole herd 

 asleep, some being always on the watch. These, on the approach of the boat, would 

 wake those next to them, and the alarm being gradually communicated, the whole 

 herd would be awake presently. But they were seldom in a hurry to get away till 

 after they had been once fired at. Then they would tumble one over the other into 

 the sea in the utmost confusion." " The female will defend her young to the very 

 last, and at the expence of her own life, whether upon the water or upon the ice. 

 Nor will the young one quit the dam though she be dead, so that if you kill one, 

 you are sure of the other. The dam when in the water holds the young one between 

 her fore-fins." These animals are killed for the sake of their oil. 



ORDER V. MARSUPIALIA. 



Teeth different in the different genera. Young brought forth 

 prematurely, often in a pouch formed by a fold of the skin of 

 the abdomen of the females, inclosing the mammae ; marsu- 

 pial bones in both sexes ; thumb of the hind feet sometimes 



