19 FISHES OF sixai. <)A. 391 



A line drawn through lateral angles would bisect a line 

 from snout to tip of tail, [nterorbital i 1 , in snout; eye 

 Ij4 i' 1 spiracles; mouth 7 in disk, ij4 in snout: tail 

 straight and slender, with a very slight fold on dorsal side. 



Ground color light olive brown, thickly set with sharp 

 cut black points; conspicuous grey or white spots, hall 

 as large as iris, scattered over the body, around which 

 the black spots form rings: brighter yellowish spots and 

 halt' spots around anterior edge of disk: tail mottled above 

 with darker; lower parts chiefly light orange red or rust 

 colored in life. 



All the markings are very distinct and clear cut, the red- 

 dish of the belly conspicuous. 



One specimen, 12 inches long. Type No. 1587, L. S. 

 Jr. Univ. Mus. 



20. jEtobatus narinari (Euphrasen). Gavilan. 



Rather common in the harbor of Mazatlan, where it 

 was also taken by Gilbert: a beautifully colored species 

 reaching a large size. 



Length of disk 173 in width; proximal half of anterior 

 margin of pectoral fins straight, distal half convex; pos- 

 terior margin concave, the end of each ray forming a 

 small scallop; lateral angle sharp. 



Snout forming an angle, from its tip to division of nasal- 

 lobes, 1% times breadth of head; width of snout i| times 

 distance from its tip to the division of nasal-lobes ; nasal- 

 lobes projecting back over the mouth; width of mouth 

 1*4 its distance to tip of snout; numerous blunt buccal 

 papilla? around upper dental plate and on ridge between 

 nostrils ; interorbital 4^ in disk ; eyes smaller than spir- 

 acles, which are as long as base of dorsal. Ventrals well 

 rounded, 3^3 in length of disk; tail 3^ times disk. First 

 caudal spine equals base of dorsal, which is half second 

 spine. 



