SHARKS AND RAYS OF BEAUFORT, NORTH CAROLINA. 



249 



Fig. 5. — Denticles, Ginglymostoma cirratunt, 26.7 cm. long, from Brazil. 



Family CATDLID/C. The cat sharks. 



Genus CATULUS Valmont. 

 7. Catulus retifer (Garman). 



Catulus retifer. Smith. 1907. p. 31. 



Teeth. — Teeth similar in both jaws, small, suberect, subequal, with a median, lanceolate cusp and 

 normally with two smaller lateral cusps; cusps of lower teeth relatively stouter, more nearly subequal, 

 number of lateral cusps more variable; teeth arranged in quincunx, several teeth in each row functioning. 



Denticles. — The denticles are large, unequal, suberect or reciu-ved, not crowded or overlapping; 

 irregular in arrangement, quite similar in form on the different parts of the body. Exposed outer 

 surface of denticle long, narrow, 

 recurved, lanceolate at tip, fre- 

 quently with one to three lateral 

 serrations, mesial portion hollowed 

 out with a low keel on each side 

 and with or without a low median 

 keel; pedicel short; base verj' large, 

 rhomboidal. Denticles around 

 mouth and on under side of snout 

 short, depressed, leaflike, without 

 sculpturing ; those along dorsal sur- 

 face of caudal slightly enlarged and 

 more closely set than those on 

 sides of body. 



Two examples in tlie labora- 

 tory collections 15.2 and 16.7 cm. in 

 length, dredged by the Fish Hauk 

 at station 7315 in 172 fathoms, have the characteristic color pattern of this species. The lins are more 

 rounded at tip than shown in Goode and Bean's illustration (Oceanic Ichthy., 1895, pi. iv, fig. 14), 

 the origin of the first dorsal is about an eye's diameter nearer tip of snout than tip of tail and the caudal 

 is more elongate. In these respects they more closely resemble C. boa (Garman, The Plagiostomia, 

 P- 77)- 



Fig. 6.- 



- Teeth ncarfront of mouth, Caiultis retifer, 16.7 cm. long, from Fish Hawk 

 station 7315, Gulf Stream, off Cape Lookout, N. C. 



