IV. 



Anal absent ; caudal rudimentary, or not in the longitudinal axis 

 of the fish. Skeleton soft. 



Only one family, with feeble dentition. 



27. Tbacdtpterii)^, iii. p. 300. 



V. 



A soft dorsal is absent or quite rudimentary ; ventrals abdominal, 

 composed of several unarticulated and articulated rays. 



Only one family 47. NoTACANxni, iii. p. 544. 



