52 PSEUDORCA. GLOBICEPHALUS. 
Measurements. Skull: total length, 595; length of rostrum, 287; 
breadth 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. 
8-8 = 
a to SS = 32 to 48. 
12 >—h2 
Globicephala Less., Nouv. Tabl. Regn. Anim., Mamm., 1842, 
Pp. 200. 
Type Delphinus deductor Scoresby = Delphinus 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; premaxille con- 
cave in front of nares, as wide at middle as at base; vertebrae, 57-60; 
first five or six cervical vertebre 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... 22.27.) 3 G. melas 52 
b. Color entirely black. 
a.’ Length of pectoral fin, 762 mm........ G. brachypterus 53 
b.’ Length of pectoral fin, 864 mm.......... G. scammont 54 
37. melas (Delphinus), Traill. Nichols, Jour., 1809, XXIII, pls 4, 
globiceps Cuv., Ann. Mus., 1812, p. 14, pli, figs. ny 2: 
deductor Scoresby, Arct. Reg., 1, 1820, t. 13, fig. 1. 
intermedius Harl., Jour. Acad. Nat. Scien. Phil., 1829, p. 51, pl.ag 
fig, 23), 
