28 NEW YORK STATE! MUSEUM 



This shark was reported at Woods Hole Mass., in 1871 by Prof.. 

 Baird. Dr Smith records four examples, each about 4 feet long^ 

 from a trap near Woods Hole, Aug. 8, 1873, since which time 

 none have bcjen olj^sjEiitYed. 



The species feeds chiefly 6n fish. 



' Genus aprionodon Gill 



Snout conical, more or less produced; teeth not serrated, nar- 

 row, on a broad base, erect in both jaws or sometimes slightly 

 oblique in the upper; dorsal over the interspace between pec- 

 torals and ventrals. 



11 Aprionodon isodon (Val. in Mtiller & Henle) 



Tihuron 



CarcJiarias isodon Valenciennes in Muller & Henle, Plagiostomei}, 32^ 



1841. 

 CafcJiarias (Aprionodon) isodon Dumeeil, Elasmobranches, 349, 1870. 

 Aprionodon punctatus Joedan & Gilbeet, Bull. 16, TJ. S. Nat. Mus. 24, 1883. 

 Carcharias punctatus Gunthee, Oat. Fish. Brit. Mus. VIII, 361, 1870. 

 Aprionodon isodon Poey, Enum. Pise. Cubens. 200, 1875; Joedan & Evee- 



mann. Bull. 47, U. S. Nat. Mus. 42, 1896. 



Snout short, compressed, and rounded; nostril one third of 

 the distance from tip of snout to angle of mouth, nearly as 

 large as the eye; the distance between the nostrils equals that 

 from tip of snout to mouth; teeth in upper jaw small, on a broad 

 base, without serrations, those of lower jaw similar but smaller, 

 a small median tooth as usual; number of teeth fr; first dorsal 

 much higher and longer than the second and is separated from 

 the last gill opening by a space equal to two thirds the length 

 of its base; pectorals reach to below end of first dorsal; caudal 

 pit very apparent, specially below; scales rounded posteriorly, 

 with five keels; color above dark gray (greenish brown, Dumeril), 

 whitish below. 



The species is recorded from New York, Virginia, and Cuba. 

 The type specimen in the Mus6e d'Histoire Naturelle, Paris, is O. 

 65m --= 25f inches long. The following measurements from the 

 type are given by Mtiller and Henle. 



