lO Memoir Sears Foundation for Marine Research 



5a. Anus far in advance of midpoint of lower lobe of caudal fin. 



6a. 77 or more myotomes. elongattnn SundcvM, li ^2. 



West coast of South America, Chile 

 to Galapagos Islands. 



6b. Not more than 73 myotomes. 



7a. 42 to 44. myotomes anterior to atriopore. 



africae liuhbs, 1927. 

 Tropical West Africa. 

 7b. Not more than 41 myotomes anterior to atriopore. 



8a. 68 to 72 myotomes in all. tattersalU Hubbs, 1922." 



Ceylon. 



8b. Not more than 66 myotomes. 



9a. Not more than 62 myotomes; ventral lobe of cau- 

 dal fin a little longer than distance from its origin 

 to atriopore; anus clearly anterior to origin of 

 dorsal lobe of caudal fin. 



lanceolatumV3.\\a.i, 1778. 

 Northern Norway to Mediter- 

 ranean and Black Sea. 

 9b. At least 63 myotomes; ventral lobe of caudal fin 

 only as long as distance from its origin to the atrio- 

 pore; anus below origin of dorsal lobe of caudal 

 fin. belcheriGrzy, 1%^-]. 



Japan, China, the East 

 Indies, Philippines, In- 

 dia, and Ceylon to East 

 Africa. 



5b. Anus near midpoint of lower lobe of caudal fin or posterior to it. 



lOa. Origin of lower lobe of caudal fin considerably anterior to origin 

 of its upper lobe. 



1 1 a. Not more than 242 dorsal fin-ray chambers or 56 myo- 

 tomes, bermudae Hubbs, 1922, p. 11. 

 lib. At least 278 dorsal fin-ray chambers. 



1 2a. Rostrum not marked oif from dorsal fin by a notch; 



65-74 myotomes. calif orniense Andrews, 1893. 



Monterey, California to Gulf of 



California. 



12b. Rostrum marked off from dorsal fin by a notch; 59-65 



myotomes. flatae Hubbs, 1922, p. 16. 



lOb. Origin of lower lobe of caudal fin about opposite origin of its 



upper lobe. caribaeum SundtvaW, 1853, p. ^3-^° 



19. Including gravelyi Prashad (Rec. Indian Mus., ^6, 1934: 333). 



20. Including jloridae Hubbs, 1922, and virginiae Hubbs, 1922. 



