15. GLOBICEPIIALUS G. SCAMMONI. 185 



to the point of greatest eulargemeut of the iuteruiaxilUx} is coutaiued 

 about two aacl a half times ia the length of the rostrum. Rostrum 

 broad, its breadth at tlie base exceeding four-fifths its length. Tem- 

 poral fossiB large and oval. Superior nares narrow transversely, and 

 bordered laterally by broad plates of the intermaxilhie. Pterygoids as 

 in G. mdm, not strongly adpressed; the sinus wide as well as deep. 



Measurements of the exterior. — ( $ . Dam Neck Mills, Ya.) Total length, 

 183 inches (464.8«"^); tip of snout to dorsal tin, 47.5 inches (120.G'"'); to 

 base of pectoral fin, 36 inches (91.4'"'); leugtb of pectoral fin, 30 inches 

 (70,2"") ; vertical height of dorsal fin, 14 inches (35.G"") ; breadth of 

 fiukes, 46 inches (116,8""). 



Measurements of the sl-ull. — (U. S. ISTational Museum. $ . No. 22561. 

 Dam Neck Mills, Va.) Total length, 66.2'"; length of rostrum, 33.3""; 

 breadth of rostrum at base, 28.S"' 5 at its middle, 23.5""; breadth of in- 

 termaxilliB at same point, 22.9'"; breadth between orbits, 45""; length 

 of temporal fossa, 16.3"". 



Habitat. — Atlantic coast of North America, from New Jersey' to the 

 Gulf of Mexico and the West Indies. 



GLOBICEPHALUS SCAMMONI Copo. 

 (Plate 42, figs, laud 2.) 



Size and form of G. Itraohyptcrus. Pectoral fins proportionally a 

 little longer. 



Color entirely black. 



Teeth, g. Skull large and very massive. Rostrum broad, its breadth 

 at the base about four-fifths its length. IntermaxilhE flat, except in 

 front; greatly expanded distally, covering the anterior half of the ros- 

 tral portion of the maxilhr, but not projecting over their lateral margins. 

 The greatest expansion of the intermaxilhie is opposite the junction of 

 the proximal and second fourths of the longitudinal axis of the rostrum. 

 Temporal fossa* oval and smaller than in G. hrachyiiterus. Superior 

 nares broad and bordered by narrow plates of the intermaxilhe; ptery- 

 goid bones closely approximated, short and strongly adpressed; the 

 sinus deep, but narrow antero-posteriorly. Tubercles of the interraax- 

 illic very strong. 



Measurements of the exterior. — ( $ . From Scammon.) Total length, 

 186 inches (472,4' ">); tip of snout to dorsal fin, 54 inches (137,2'"'); 

 to pectoral fin, 33 inches (83,8""); length of pectoral fin, 34 inches 

 (86,4'-'"); breadth of fiukes, 42 inches (106,7''"). 



Measurements of slmU.—iU. S, National Museum, No, 9074.) Total 

 length, 69'"; length of rostrum, 34""; breadth of rostrum at base, 

 30.8'™; at its middle, 25.2""; breadth of intermaxilhie at the same ])oint, 

 23.6""; breadth between orbits, 48.7 ""; length of temporal fossa, 14.8"". 



Habitat. — North Pacific Ocean. 



