Storer's Synopsis of the Fishes of North America. 257 



implanted like teeth. The true teeth in the jaws are small and rounded, as in 

 Mustelus. 



1. Pristis antique-rum, Lath. 



Dusky above ; pale gray beneath. Elongated beak, with twenty-four teeth on each side. 

 Skin fine shagreen. 

 D. (>)• P- (•')• V. (.'). A. (.')• C. (>.). Length, 12 to 15 feet. 

 New York, Schoepff. 



Squalus pristis, Lin., Syat, Nat, 



" " Pennant's Arct. Zool., Supplement, p. 105. 



" " Fabricics, Fauna Groenlandica, p. 130. 



" " Saw-snouled Shark, Shaw's Gen. Zool., v. p. 3j7. 



!Yz dfi Espada (?). Parra, p. 75, pi. 33. 

 Pristis aniiquorum, Saw-fish, Griffith's Cut., x. p. 408. 

 " " Common Saw-fish, Uekav's Report, p. 365. 



Besides the Squalidae above referred to, Mitchill, in his paper on the " Fishes of New York," 

 very concisely speaks of a species which he calls " Squalus Americanus, —short, with ob- 

 long, sharp teeth, each of which has a little one each side at its base." He remarks, that 

 " both jaws have five rows of teeth in front, nearly an inch long, and not jagged at the 

 sides." Subsequently, he considered it a new species, and in his Supplement, published, in 

 1818, in the "American Monthly Magazine,"' p. 328, has called it Squalus macrodus, or 

 Long-toothed Shark. What this species is must be determined by further research. In a 

 supplement to my " Report on the Fishes of Massachusetts," published in the " Boston 

 Journal of Natural History," Vol. IV., p. 1S8, I spoke as follows of a fragment of a Shark's 

 jaw, which either belonged to this or an undescribed species. " The portion of the jaw be- 

 fore me is six inches in length, and two inches wide at its lip. From the tip of the jaw to 

 the posterior angle on each side are situated seven teeth ; the two on each side of the chin 

 are longer, narrower, and straighter than those exterior to them. Dr. Prescott observed, in 

 his letter to me, that when taken ' it exhibited three, and in some places four, rows of long, 

 narrow teeth.' Now that the soft parts are removed, the two teeth next the chin are 

 seen continued back into the mouth seven rows deep ; in the first row, the two exterior teeth 

 are shorter than the third within them ; this third tooth, with the two still within it, are 

 about the same size ; the outer tooih of the second row is of the same height as the third of 

 the first row, and in this row they pass backwards, decreasing as in the first row. The teeth 

 of the other five rows diller very much from those spoken of, in their form ; they are shorter, 

 wider, and less stout, curving towards the angle of the jaw : those of the sixth and sev- 

 enth row3 being shorter than those of the previous three rows." 



76 



