NARCACION CALIFORNICUS. 311 



second dorsal less than half as large as the first, and base longer than the distance 

 from the first. Tail not far from one third of the total length, about nine 

 sixteenths of the length of the body cavity, narrow, depressed, rounded at the 

 sides, with a low dermal fold on each side from opposite the space between the 

 dorsals; caudal axis slightly raised, length about three fourths of the depth, 

 subtruncate. 



Dark chocolate-brown on the back and below the edges of disk, fins, and 

 tail; balance of lower surface white. 



Total length 25j, body cavity 16, length of disk 13, and width of disk 17 

 inches. 



Mediterranean Sea to the Western Atlantic. 



Bonaparte's figures of N. nobilianus have the notched condition of the 

 pectorals seen on fig. 4, and 5 of Plate 61. Kaempfer's figures of N. sinus- 

 persici Dumeril exhibit similar notches. 



NaRCACION CALIFORNICUS. 

 Plate 53, fig. 2 (pelvis). 



Torpedo calif ornicd Ayres, 1855, Proc. Cal. acad. sci., 1, p. 70; Jord. & Gilbert, 1882, Bull. 16, U. S. 



nat. mus., p. 39, 876; Garman, 1888, Bull. M. C. Z., 17, p. 93, pi. 31. 

 Tetronarce californica Jord. & Everm., 1896, Bull. 47, U. S. nat. mus., p. 77. 



Disk broader than long, subcircular. Snout short, convex. Nostrils 

 small, not as wide as their distance apart; anterior valves, not long, confluent, 

 forming an upper lip, no lobule present as on N. nobilianus; outer section of 

 posterior valve curved forward at the outer side of the nostril, inner section 

 turned backward toward the angle of the mouth. Mouth wide, crescentic, 

 with a fold at each angle. Teeth small, broad-based, inner edge of crown with 

 a slender acute cusp, in il rows on a thirteen inch individual. Eyes small. 

 Spiracle larger than the eye, less than one diameter farther back, without fringes. 

 Dorsals small, rounded; anterior dorsal twice as large as the posterior, base 

 entirely above ends of bases of ventrals; second dorsal one length of its own base 

 farther back than the base of the first. Tail short, with a low fold on each side 

 from opposite the space between the dorsals. Caudal large, deeper than long, 

 with angles rounded, subtruncate. 



Brown, edges of dorsals fight; lower surfaces white, outer edges brown. 



Total length of specimen described 13, length of disk 7^, length of body 8^ 

 and width 9| inches. 



CaHfornia. 



