ZIPHIUS. 47 



The two-toothed Whales of the next genus were supposed to be 

 extinct, as the imperfect skull of Z. cavirostris , found on the French 

 Mediterranean coast in 1823, was described as a fossil. Various indi- 

 viduals have been observed since then, from as far north as the Shet- 

 land Islands, and to New Zealand in the South, and these have been 

 separated into several species, not all probably entitled to the dis- 

 tinction. Specimens have occasionally drifted, or been driven 

 ashore, and as many as twenty-five individuals were at one time 

 stranded on the Chatham Islands east of New Zealand. This Ceta- 

 cean varies in length from fourteen to twenty feet. 



19. Ziphius. 



0-0 



I I 

 Ziphius G. Cuv., Rech. Oss. Foss., v, 26. ed., 1823, p. 352, pi. xxvn, 



figs. 3, 4, 7, 9. Type Ziphius cavirostris Cuvier. 

 Aliama Gray, Proc. Zool. Soc., 1864, p. 242. 

 Petrorhynchus Gray, Zool. Soc., 1865, p. 524. 

 Ziphiorrhynchus Burm., Revista Farmge., Bull. Acad. Belg., 1865, 



Id. Ann. Mag. Nat. Hist., 3d Ser., xvn, 1866, p. 94. 

 At anterior end of the mandible on each side is a single conical 

 tooth directed upward and forward. Rostrum triangular, tapering 

 from base to apex; edges of maxillae at base of rostrum raised into 

 roughened tuberosities. 



33. cavirostris (Ziphius}, G. Cuv., Rech. Oss. Foss., v, 2d ed., 1823, 



p. 353. Elliot, Syn. N. Am. Mamm., 1901, p. 16. 

 TWO-TOOTHED WHALE. 



Geogr. Distr. All seas. 



Genl. Char. Same as those of the genus. 



Color. Steel gray with numerous irregular white streaks ; beneath 

 white. 



Total length, 16 feet. 



The members of the next family, Delphinida, are many and 

 various, and their arrangement into subfamilies, or even genera, 

 from lack of requisite knowledge of some of the species, is not easy of 

 accomplishment. Among the diversified forms are found, the well- 

 known Porpoise with its many relatives ; the curious Narwhal with its 

 ivory spear, a formidable weapon both for offense as well as defense ; 

 the Cow-fish (Tursiops gilli)', the Black-fish, or Ca'ing Whale (Globi- 

 cephalus melas) ; the savage Orcas, or Killer Whales ; and the numerous 

 species of DOLPHINS, inhabitants of many seas, beside other genera 



