32 2 Memoir Sears Foundation for Marine Research 



Teeth 4^43; those of females close-set in quincunx, circular to oval at base and 

 with low triangular cusp except near corners of mouth where base is more oval and 

 cusps are usually lacking, the anterior rows much worn and nearly smooth; those of 

 adult males with long sharp cusps, pointing obliquely outward near center of mouth 

 beside the symphysis, those toward outer corners of mouth with low triangular cusps. 



First and second dorsals similar in size and shape, the posterior margin some- 

 what re-entrant. Interspace between dorsals about 1/3 as long as base of first dorsal. 



Figure 76. Cruriraja poeyi. A Lower side of anterior part of head of male pictured in Fig. 75-5 Margins of 

 right-hand (above) and left-hand (below) nasal curtains of same, about 5.8 X. C Side view of posterior part of 

 tail of same, about i.zx. D Upper teeth of same, from near center of jaw, about 1 2 x . jff Ventral view of pelvics 

 of female pictured in Fig. 75. /" Left-hand nostril of same, about 6.9 x . G Upper teeth of same from near center 

 of jaw, about 14 X. 



Caudal membrane posterior to second dorsal about as long as base of first dorsal. 

 Anterior division of pelvics about as long as posterior division, the latter strongly con- 

 vex outwardly and slightly wavy in females and in young males, only weakly convex 

 in adult males; rear tips subangular, reaching back about V4 the distance from axils 

 of pectorals toward first dorsal. Claspers of mature males slender with simple tips, 

 reaching back a little less than halfway from axils of pelvics toward first dorsal. 



Anterior rays of pectorals extending about 49—55 "/o of distance from level of 

 fronts of orbits toward tip of snout. 



Color. Upper surface pale coffee brown except for a translucent area either side 

 of rostral cartilage, usually with roundish dark spots, about half as long as orbit, scat- 

 tered over disc posterior to spiracles except along outer posterior margins; anterior 



