40 NEW YORK STATE MUSEUM 



jaw on each side small; gill openings wide and all of them in 

 advance of the pectoral base; first dorsal falcate, inserted over 

 the axil of the pectoral; second dorsal and anal very small, 

 nearly opposite each other; pectoral falcate, its length nearly 

 equal to greatest depth of body and equals distance from angle 

 of mouth to last gill opening. 



Color dark slate, whitish beneath. Found in the Atlantic 

 and Pacific, north to Massachusetts bay and the Gulf of Alaska; 

 called salmon shark at Kadiak. Beaches a length of 10 feet. 



The porbeagle, salmon shark, or mackerel shark is a very 

 powerful and destructive species, and it has a wide distribution. 

 If the figure of Lamna punctata Storer be correct, his 

 mackerel shark] must be Lamna cornubica and not 

 Isurus dekayi. The advanced position of the first dorsal 

 seems to indicate this. 



Genus carcharodon Smith 



Agrees with Isurus and Lamna except in dentition; 

 teeth large, flat, erect, triangular, serrate; first dorsal moderate, 

 nearly midway between pectorals and ventrals; second dorsal 

 and anal very small; pectoa'als large; ventrals moderate; caudal 

 peduncle stout; caudal lobes large and strong; deep pits at the 

 base of the caudal fin above and below. 



10 Carcharodon carcharias (Linnaeus) 

 Oreat White Shark; Man-eater 



l^qiialus carcharias Linnaeus, Syst. Nat. ed. X, 235, 1758. 



Carcharias atwoodi Stoker, Troc. Bost. Soc. Nat. Hist. III. 72, 1848; Hist. 



Fish. Mass. 246, pi. XXXVI, fig. 4, 1867. 

 Carcharodon carcharias Jordan & Gilbert, Bull. 16, U. S. Nat. Mus. 875, 



1883; Jordan & Evermann, Bull. 47, U. S. Nat. Mus. 50, 1896. 



I'xKly stout, its greatest depth contained about five or five and 

 one lialf times in the total length, and equaling about three 

 foiiiilis of I he length of the head; eye perpendicularly oblong, 

 and a I. on I one tliird as long as the snout; caudal lobes large and 

 sliunj;, nearly equal in length, the upper about six sevenths of 

 depth (r 1m. dy; caudal peduncle stout, strongly keeled, its least 

 depth two thirds of snout, deep pits at the base of the caudal 



