15. GLOBICEPHALUS — G. SCAMMONI. 185 



to the point of greatest eulargemeut of the iutermaxilUxi is contained 

 about two and a balf times in the length of the rostrum. Kostrum 

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

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

 bordered laterally by broad plates of the inter max! Ihv, Pterygoids as 

 in G. mcla'i, not strongly adpressed; the sinus wide as well as deep. 



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

 183 inches (404.8''"); tip of snout to dorsal fin, 47.5 inches (120.G""); to 

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

 (70.2'='") ; vertical height of dorsal fin, 14 inclies (3o.G'"') ; breadth of 

 flukes, 46 inches (110.8''")- 



Measurements of the slull. — (U. S. National Museum. S . No. 22561. 

 Dam Neck xMills, Va.) Total length, 00.2^'"; length of rostrum, 33.3^'"; 

 breadth of rostrum at base, 28.8'"; at its middle, 23.5""; breadth of in- 

 termaxilhie at same jioint, 22.9''"'; breadth between orbits, 45""; length 

 of temporal fossa, 10.3'"". 



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

 Gulf of Mexico and the West Indies. 



GLOBICEPHALUS SCAMMOXI Cope. 

 (Plate 42, figs. 1 .ind 2.) 



Size and form of G. hraohypterus. 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. Interraaxilla.' flat, except in 

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

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

 The greatest expansion of the intermaxilhie is opposite the junction of 

 the i^roximal and second fourths of the longitudiual axis of the rostrum. 

 Temporal fossae oval and smaller than in G. hrachypterus. Superior 

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

 goid bones closely approximated, short and strongly adpressed; the 

 sinus deep, but narrow anteroposteriorly. Tubercles of the iutermax- 

 ilhie very strong. 



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

 180 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 

 (80.4'-'"); breadth of flukes, 42 inches (106.7'''"). 



Measurements of slcuU. — (U. S. National Museum, No. 9074.) Total 

 length, 09""; length of rostrum, 34'^^'"; breadth of rostrum at base, 

 30.8'"'; at its middle, 25.2'^'"; breadth of intermaxillie at the same point, 

 23.0"='"; breadth between orbits, 48.7'^^'"; length of temporal fossa, 14.8"°. 



Habitat. — North Pacific Ocean. 



