62 PSEUDORCA. GLOBICEPH ALUS. 



Measurements. Skull: total length, 595; length of rostrum, 287; 

 br.eadth at base, 208; at middle, 188; interorbital breadth, 333; 

 length of temporal fossa, 191. 



The Black-fish, the name usually given to the species of the next 

 genus, are accustomed to go in large schools, keeping near the coast, 

 seeking small fish, on which they subsist. These animals are inoffen- 

 sive and gentle, and when alarmed can easily be driven ashore (if 

 their pursuers are on the seaward side), as they huddle together like 

 sheep and follow blindly any leader. They are found in all seas, and 

 it is stated that the flesh, after having been exposed to the air and 

 properly cooked, is not unpalatable. The Black-fish yield but little 

 oil, not equal to that of the great whales. 



23. Globicephalus. Dolphins. Black-fish. 



Globicephala Less., Nouv. Tabl. Regn. Anim., Mamm., 1842, 

 p. 200. 



Type Delphinus deductor Scoresby=Delphimis melas Traill. 



Teeth only on anterior half of rostrum and mandible, small, 

 conical, acute, curved; rostrum short, broad; mandibular symphysis 

 short; pterygoids in contact; skull broad, depressed; premaxillae con- 

 cave in front of nares, as wide at middle as at base; vertebrae, 57-60; 

 first five or six cervical vertebrae coalesced; forepart of head round; 

 dorsal low, triangular. 



KEY TO THE SPECIES. 



A. Head with obtuse ridge above jaw; teeth 

 conical, persistent in both jaws, confined 

 to anterior half of rostrum. 



a. Color black, with white area beneath; length PAGE 

 of pectoral fin, 1270 mm ...................... G. melas 5 2 



b. Color entirely black. 



a/ Length of pectoral fin, 762 mm ........ G. brachypterus 53 



b/ Length of pectoral fin, 864 mm .......... G. scammoni 54 



37. melas (Delphinus'), Traill. Nichols, Jour., 1809, xxm, pi. 3. 

 globiceps Cuv., Ann. Mus., 1812, p. 14, pi. i, figs, i, 2. 

 deductor Scoresby, Arct. Reg., i, 1820, t. 13, fig. i. 

 intermedius Harl., Jour. Acad. Nat. Scien.Phil., 1829, p. 51, pi. i, 

 fig- i3- 



