INTRODUCTION 7 



Order OPISTHOBRANCHIATA. 

 Suborder Tectibranchiata. 

 Tribe Bulloidea. 



Family Actaeonidae. 



I. Actaeon cumingii A. Adams. 



Rio Janeiro, A. Adams, Proc. Zool. 

 Soc., London, 1854, p. 59. 

 Family Ringiculidae. 



*2. Ringicula peracuta Watson. 



Off Pernambuco, 350 fathoms. Wat- 

 son, Challenger Gasteropoda, p. 636. 

 =Ringicula nitida Verrill, Dall, 

 Bulletin Museum Comp. Zool. Har- 

 vard, XVIII, 1889, p. 43. 

 Family Tornatinidae. 



3. Tornatina liratispira Smith. 



Rio Janeiro, E. A. Smith. Annals 

 and Magazine Nat. Hist., (4), IX, 

 P- 354- 



4. Tornatina canaliculata (Say). 



Anchorage off Fernando Noronha, 

 7-25 fath. Watson, Chall. Gasterop., 

 P- 655- 

 *5. Retusa ovata (Jeffreys). 



Off Pernambuco, 350 fath. Watson, 

 Chall. Gasterop., p. 664. 

 Family Scaphandridae. 



*6. Diaphana seguenzae (Watson). 



Off Pernambuco, 350 fath. Watson, 

 Chall. Gasterop., p. 646. 



7. Cylichna noronyensis Watson. 



Anchorage off Fernando de Noronha, 

 7-25 fath. Watson, Chall. Gasterop., 

 p. 666. 



8. Cylichna bidentata (d'Orbigny). 



Canal de San Sebastiao, Von Ihering. 

 Revista Museu Paulista, II, 1897, 

 p. 169. 



