AETOBATUS NARINARI. 441 



point. On the specimen figured by Schneider there were no spots; on that 

 used in the present comparisons spots are present but scattered and not sharply 

 defined; they approach closely to the conditions figured by Shaw in Rata guttata. 

 The individual was taken at Mauritius; its measurements are length of body 

 lis, of tail 38, and width of disk 2li inches. Skin smooth; tail rough in old 

 specimens. A specimen of the uniform brown type like that figured by Schneider 

 and Bloch is 38 inches wide and 23 inches in length from snout to ends of ventrals; 

 the anterior margins of its pectorals are nearly straight, the posterior are con- 

 cave in the outer half and convex on the inner, the outer angles are sharp, very 

 little blunted, and the hind angles are broadly rounded ; the origin of the dorsal 

 is about one length of the base behind the ends of the ventral bases and the end 

 of the fin is in front of the ends of the ventral fins. 

 Red Sea; Indian Ocean. 



AETOBATUS NARINARI. 



Plate 49, fig. 1-3 (teeth); Plate 54, fig. 4 (pelvis); Plate 65, fig. 9 (vertebrae); Plate 57, 

 fig. 4 (heart); Plate 73, fig.- 4 (skeleton). 



Narinari brasiliensibus Marcgrave, 1648, Hist. nat. Brasil., p. 175, fig.; Willughby, 1686, Pise, p. 66, 



pi. CI, f. 5. 

 Whip-ray Brookes, 1763, Nat. hist., 3, Fishes, p. 36. 

 Bow narinari Euphrasen, 1790, Kongl. sven. vet. akad. Nya handl., 11, p. 217, pi. 10; Schneider, 1801, 



Bloch Ichth., p. 361. 

 Aitlobatus narinari Blainv., 1816, Bull. Soc. philom., p. 112; Muller & Henle, 1841, Plagios., p. 179; 



Agass., 1843, Rech. poiss. foss., 3, p. 325; 1833, Atlas, pi. D, f. 1, 2; Dumeril, 1865, Elasm., p. 641; 



Gunth., 1S70, Cat. fishes Brit, mus, 8, p. 492 (part); Jordan & Gilbert, 1882, Bull. 16, U. S. 



nat. mus., p. 50; Jord. & Everm., 1896, Bull. 47, U. S. nat. mus., p. 88; 1900, ibid., Atlas, pi. 



15, 16; Everm. & Marsh, 1902, Bull. U. S. fish comm., 20, p. 67, fig. 4,5; Coles, 1910, Bull. 



Amer. mus. nat, hist., 28, p. 338. 

 Myliobatis narinari Cuv., 1817, Reg. anim., 2, p. 138. 



Raia quinquemaculata Quoy et Gaimard, 1824, Voy. Uran. Poiss., p. 200, pi. 43, f. 3. 

 Aelobalis latirostris Dumeril, 1861, Arch, mus., 10, p. 242, pi. 20, f. 1; 1865, Elasm., p. 643; Gunth., 



1866, Trans. Zool. soc. London, 6, p. 491. 

 Atiobatus laliceps Gill, 1865, Ann. N. Y. lye, 8, p. 137. 

 Stoasodon narinari Jordan & Gilbert, 1882, Bull. 16, U. S. nat. mus., p. 879. 

 Stoasodon laticeps Jordan & Gilbert, 18S2, Bull. 16, U. S. nat. mus., p. 879. 



Width of the disk nearly twice the length; anterior borders convex, poste- 

 rior concave. Pectorals somewhat falciform, acute on the outer angle. Rostral 

 fins distinct from the pectorals, joined in a single produced, depressed, and 

 pointed lobe. Cranium large, narrower toward the mouth, convex across the 

 crown. Teeth in a single row on each jaw, broad and short, fused, upper wider; 

 lower pavement flatter and more produced. Each tooth is curved or angled 

 forward more or less in the middle, the amount varying in the individual. Eyes 

 prominent. Spiracles large, lateral, behind the eyes, partly visible from above. 



