432 THE PLAGIOSTOMIA. 



long, width greater with age. No horn above the orbit. Pectorals nearly 

 equilateral triangles; anterior margin somewhat convex, posterior concave; 

 outer angle narrowly rounded, hinder acute. Ventrals rather short and broad, 

 with about half of the outer margin extended behind the pectorals. Dorsal 

 small one length of its base behind the ends of the ventrals or nearly three 

 lengths behind their bases. Tail about twice as long as the body, with a serrated 

 spine behind the dorsal. Skin smooth. 



Back brown; dingy white below, brownish toward the edges. 



Mediterranean and neighboring Atlantic. 



Myliobatis freminvillii. 

 Plate 35; Plate 39, fig. 2; Plate 54, Bg. 3. 



(?) Raja bonasus Mitch., 1S15, N. Y. lit. & philos. trans., 1, p. 479. 



Myliobatis freminvillii Lesueur, 1824, Journ. Acad. nat. sci. Phil., 4, p. Ill; Jordan & Gilbert, 1882, 



Bull. 16, U. S. nat. mus., p. 51 ; Jord. & Everm., 1S96, Bull. 47, U. S. nat. mus., p. 89. 

 Myliobatis bispinosus Storer, 1842, Proc. Bost. soc. nat. hist., 1, p. 53; Journ. Bost. soc. nat. hist., 4, 



p. 188; Ayres, 1843, Journ. Bost. soc. nat. hist., 4, p. 290; Dumeril, 1865, Elasm., p. 637. 

 Myliobatis acuta Ayres, 1842, Proc. Bost. soc. nat. hist., 1, p. 65; Linsley, 1844, Amer. journ. sci., 47, 



p. 79; Storer, 1846, Mem. Amer. acad., new ser., 2, p. 514; 1S67, Mass. fishes, p. 269. 



Width of disk less than twice its length. Snout narrowing forward, rather 

 pointed; rostral fins connected at the side of the head with the pectorals by 

 rays as long as the eye. Skull broad, rounded anteriorly, deeply concave in 

 front of the foramen; foramen narrow and rounded backward, broad in front. 

 Teeth in seven rows, in outer three as wide as long, in median row three or more 

 times as wide as long. Anterior nasal valves confluent in a wide flap, rounded 

 at the angles, free and slightly fringed on the hind margin. Length and width 

 of pectorals about equal, outer extremity pointed, curved, anterior margin little 

 convex, posterior concave, hind angles not elongate. Ventrals as broad as long, 

 hind angles and margins rounded. Dorsal moderate, rounded above, highest 

 in the middle, hind angle produced, origin distant from the bases of the ventrals 

 one and one half lengths of the fin. Tail slender, more than twice the length of 

 the body from snout to vent, with a serrated spine behind the dorsal. A horn 

 above the orbit of the male. 



Back and tail brown; lower surfaces white, darkening toward the outer 

 margins. 



Cape Cod; New York; Brazil. 



