Storer’s Synopsis of the Fishes of North America. 509 
implanted like teeth. The true teeth in the jaws are small and rounded, as in 
Mustelus. 
1. Pristis antiquorum, Lara. 
Dusky above ; pale gray beneath. Elongated beak, with twenty-four teeth on each side. 
Skin fine shagreen. 
D. (?). P.(?). V.(?). A-(?). ©. (?). Length, 12 to 15 feet. 
New York, Scuorrrr. 
Squalus pristis, Lin., Syst. Nat. 
(2 “ Pennanr’s Arct. Zovl., Supplement, p. 105. 
Ge «  Fasricius, Fauna Groenlandica, p. 130. 
W *€  Saw-snouted Shark, SHaw’s Gen, Zodl., v. p. 357. 
Pez de Espada (2), Parra, p. 75, pl. 33. 
Pristis antiquorum, Saw-fish, GrurritH’s Cuv., x. p. 408. 
* Us Common Saw-fish, DEexay’s Report, p. 365. 
Besides the Squalide 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. Ina 
supplement to my ‘‘ Report on the Fishes of Massachusetts,” published in the ‘* Boston 
Journal of Natural History,” Vol. IV., p. 188, 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 tip. 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 tooth 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 firstrow. The teeth 
of the other five rows differ 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 sey- 
enth rows being shorter than those of the previous three rows.”’ 
76 
