4 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



Order BaTOIDEI 



Torpedinidae 



Generic determination of material in this family was made with the 

 aid of Bigelow and Schroeder (1953) 



Narcine brasiliensis (Olfers) 



Material: A 39-39, 1 (305.0 mm. T. L.), AHF 2429, from Rockly 

 Bay, Tobago Island, West Indies. 



Diplobatis guamachensis Martin 



Material: A 24-39, 1 (142.0 mm. T. L.), AHF 2428, from Cubagua 

 Island, Venezuela. 



Order ISOSPONDYLI 



Unidentified Isospondyli larvae 



Material: A 6-39, 1 (32.2 mm.), AHF 2833, from Caledonia Bay, 

 Panama. 

 A 12-39, 5 (12.6—23.9 mm.), AHF 2834, from 11 mi. 

 S. W. of Cape la Vela, Colombia. 

 Remarks: The latter specimens were in poor condition. 



Albulidae 



Albula vulpes (Linnaeus) ? 



Material: A 6-39, 10 (42.5—56.7 mm.), AHF 2621, from Caledonia 



Bay, Panama. 



A 49-39, 4 (32.9—72.1 mm.), AHF 2620, from Caledonia 



Bay, Panama. 



Remarks: The dorsal fin ray count for our material on an average 



ran higher (16 to 19, usually 18 or 19) than the 14 to 17 count given 



by Gehringer (1959: 620) for this species. However, Gehringer did not 



include the genus Dixonina Fowler (1911) in his discussion, and Beebe 



(1942: table 1) showed that the dorsal fin ray count in the western 



Atlantic D. nemoptera Fowler can range from 16 to 19. One specimen 



of D. nemoptera that we examined, from Jamaica, had 17 dorsal fin rays. 



The tips of the dorsal fin rays of our largest specimen (from AHF 



2620) unfortunately were broken and we therefore cannot say with 



