292 Memoir Sears Foundation for Marine Research 



from inner end of each spiracle; 4-5 on each shoulder; a median row of about six 

 larger thorns from nuchal region to pectoral girdle, followed by 5-6 smaller ones more 

 widely spaced to level of axils of pectorals, then by about 40—44 larger ones more closely 

 spaced along tail; also, each side of tail with 2—3 irregular rows, the thorns successively 

 a little larger and more closely spaced rearward to first dorsal, followed by smaller 



Figure 65. Breviraja colesi. A Mouth and nostrils of female illustrated in Fig. 64. B Margin of right-hand nasal 

 curtain of same, about 5.6 X. C Left-hand nostril of same, about 5.6 X. D Upper teeth of same, near center of 

 jaw, about 17X. £ Upper teeth, near center of jaw, of male illustrated in Fig. 64, about 17X. f Dorsal view 

 of tip of clasper of another mature male, from off north coast of Cuba, about 0.7 X- 



ones below dorsals; pelvics of females with a few small prickles on central part of 

 posterior lobe, those of adult males smooth; dorsals prickly along upper parts; caudal 

 membrane sparsely prickled. Very small specimens with fewer thorns around orbits, 

 only 1—2 on each shoulder, 3-4 in median row from nuchal region to pectoral girdle; 

 thorns on tail in more regular rows than on adults. Alar spines of sexually mature males 

 in 2—3 rows near outer corners of pectorals. Lower surface smooth. 



Snout in front of orbits about 1.7-2.2 times as long as orbit, its length in front 

 of mouth about 1.4- 1.7 times as great as distance between exposed nostrils. Orbit 

 about 1.5— 1.9 times as long as distance between orbits and about 1.6 times as long 

 as spiracle. Distance between first gill openings 1.9— 2.1 times as long as distance be- 

 tween exposed nostrils, i.o-i.i times between fifth gill openings; first gill openings 

 about as long as fifth and about 20-30 "/o as long as breadth of mouth. Nasal curtain 



