RAIA TENGU. 355 



Raia johannis-davisi. 



Uaiajokannis-dauisi ^lcock, 1809, Cat. deep-sen lishes Indian nius., ]). 121, III. zool. Investigator, pi. 



27, f. 2. 



Disk rhomboid, without the ventrals nearly half the total length, width 

 more than its length including the ventrals. Anterior and outer margins nearly 

 straight, outer angles nearly 90°, hinder angles very broadly rounded. Snout 

 produced acuminate, length little more than one fourth of the width of the disk. 

 Mouth straight; teeth blunt-pointed (male), in about 32 rows. Disk and tail 

 smooth on both surfaces, excepting some star-shaped spines below the rostral 

 cartilage and on the edges of the snout and the front ends of the pectorals, two 

 strong spines in front of and one behind each orbit, a very strong spine in the 

 middle in front of the shoulder girdle, and a median series of spines on the tail 

 to the second dorsal. The outer angles of the disk appear farther backward 

 than the shoulder girdle. 



Smoky black above, black mottled with white below. 



Type a male 8j inches in length taken off the Travancore Coast in 224-284 

 fathoms. 



Raia tengu. 



Raia tengu Jordan & Fowler, 1903, Proc. U. S. nat. mus., 26, p. 654. 



Disk rhomboid, broader than long, front angle acute, outer angle about 90°, 

 anterior margins undulate, deeply concave near the snout, hinder margins 

 somewhat convex. Snout long, slender, sharp, length nearly one third of the 

 width of the disk. Eyes small, two ninths of the interorbital width. Mouth 

 large, arched; teeth in 38 rows. Spiracles smaller than the eyes. Tail less 

 than half the total length, produced behind the second dorsal. Dorsals sepa- 

 rated by a space with spines. Back roughened by small spines; some above the 

 snout, some on the orbital ridges, several on the back of the head, a median row 

 of small tubercles from the pelvis backward, and a lateral row on each side of the 

 tail; lower surfaces, especially in front, roughened, excepting tail and ventrals. 



Brown above and below with small spots of lighter brown; lower pores 

 blackish. 



Type 44 inches in length, from Matsushima Bay. 



Young with a shorter snout, and with a pair of tubercles in front of and a 

 single tubercle behind each orbit, one behind the head on the middle of the back, 

 and a median row on the tail, elsewhere smooth. 



Coasts of Japan, not rare, especially to the northward. 



