SPECIES OF MAMMALS OF THE PACIFIC AREA 131 



species is reported from near New Zealand, but not elsewhere 

 in the southern Pacific. Both species have two large teeth, 

 roughly triangular in shape, one on each side of the lower jaw. 

 Dorsally they are black with the underside whitish, gray, or 

 flecked with black. They have a well-developed forehead and 

 a long and heavy beak. The northern species reaches about 

 thirty feet, the southern about forty. 



Cuvier's or Goose-beaked Whale {Ziphius) is about eight- 

 een feet in length. It varies above from black to gray or even 

 white, at least on the foreparts. A single pair of teeth is pres- 

 ent, situated near the tip of the lower jaw. It is recorded from 

 off Australia, New Zealand, and Java. 



Typical Beaked Whales (Mesoplodon) of several species oc- 

 cur in Australian and New Zealand waters ; another is found 

 from the Bering Sea to California and may be expected in Jap- 

 anese waters. All species have a single pair of teeth in the lower 

 jaw; in some species these teeth are sometimes large and sit- 

 uated about the middle of the jaw, and in other species they 

 are poorly developed and placed near the tip. Beaked whales 

 are from ten to twenty feet long, depending on the species ; the 

 beak is long and the forehead poorly developed. 



The Killer Whale (Orcinus) is black in color, with distinc- 

 tive white markings on the underparts and sides. The dorsal 

 fin is large, situated near the middle of the body, and the flip- 

 pers are broad and paddle-like. Killers are twenty to thirty 

 feet long and have from ten to twelve large conical teeth on 

 each side of the upper and lower jaws. They are found in all 

 seas. They feed normally on large fish, smaller dolphins, and 

 seals. Occasionally they form packs like wolves to attack larger 

 whales and may be dangerous to a ^person in the water. 



The Gray Porpoise or Risso's Dolphin (Grampus) has a 

 high, sickle-shaped dorsal fin, much like that of the killer whale. 

 It is only about ten feet long, however, and grayish in color, 

 with a pale head. It has hardly any beak ; the front of the head 

 rises almost vertically from the tip of the upper jaw and the 

 forehead bulges. The flippers are long and narrow. Risso's 



