184 imLLETiN m, united states national museum. 



one-fifth tlie total leugth of the body. Dorsal fin ou a long base and 

 strongly recumbent, situated anterior to the middle of the leugth of the 

 body. Caudal ridges prominent, extending respectively to the dorsal 

 fin and to the vent. Flukes large and broad. Mouth oblique. 



General color uniform black ; a large hastate white area on the breast 

 extending from the line of the corners of the mouth to the base of the 

 pectoral tins; from behind this area a white band, which is much the 

 broadest in the posterior half, extends backwards along the median 

 line to the vent ; the whole white area has the general form of an arrow 

 with its head, shaft, and feathers. 



Teeth JJ. Vertebrae: C. 7; D. 11 ; L. 13 (-14); Ca. 27(-29) = 5S-G0. 

 Skull large and massive. Eostrum longer than broad at the base; its 

 breadth at the base slightly less than three-fourths its length. Inter- 

 maxillre large and flat ; not greatly broader anteriorly than posteriorly; 

 rugose in front ; their outer margins not coinciding with the margins 

 of the maxillaj except at the extremity of the rostrum ; separated in the 

 median line throughout. Superior nares broad transversely and bor- 

 dered by narrow plates of the intermaxillne. Vomer extending nearly 

 to the extremity of the rostrum. Pterygoid bones large, obtusely keeled, 

 and closely approximated in the median line. Temporal fossre moderate, 

 oval. 



Measurements of the exterior {from Bell). — Total length, 182 inches 

 (1G2.3""); extremity of snout to corner of month, 14.5 inches (36.8""); 

 to dorsal fin, 55 inches (139.7""); length of pectoral fin along anterior 

 edge, 50 inches (127""); greatest breadth of pectoral fin, 11 inches 

 (27.9""). 



Measurements of the sl-ull. — (U. S. National Museum, No. 12100, Cape 

 Cod, Massachusetts.) Total leugth, 055""; length of rostrum, 33.4""; 

 breadth of rostrum at base, 24.1""; at its middle, 19.4""; breadth of in- 

 termaxillai at same point, 15.4""; breadth between orbits, 42.3""; length 

 of temporal fossa, 17.3'"'. 



Habitat. — Atlantic coast of North America to New Jersey ; coast of 

 Europe; Cape of Good Hope; New Zealand. 



GLOBICEPIIALUS BKACHYPTERUS Cope. 

 (Plate 41, fig. 1.) 



In form and size like G. melas. Pectoral fins shorter, their length 

 about one-sixth the total length of the body, or less. Dorsal fin situ- 

 ated far forward, usually at the Juncture of the anterior and second 

 fourths of the length of the body. 



Color entirely black. 



Teeth, ^. Vertebra?: C. 7 ; D. 11; L. 11; Ca. 28=57. Skull large 

 and massive. Intermaxillai large and flat; greatly expanded ante- 

 riorly, covering the anterior half of the rostral part of the maxilliie and 

 projecting over their margins. Tlie distance from the maxillary notch 



