Class GASTROPODA. 

 Subclass ANISOPLEUEA. 



Order OPISTHOBRANCHIATA. 

 Suborder TECTIBRANCHIATA. 



Family ACT^EONID^. 

 Genus ACTiEON Montfort. 



Subgenus ACTiEON 3. s. 



Shells rather thin, with a single plait on the columella, which passes 

 continuously into the anterior margin of the peristome. Type A. tornatilis 

 Linne. 



Actaeon exilis Jeffreys. 



Actceon exilis Jeffreys, Ann. Mag. Nat. Hist., 4th ser., VI. p. 85, 1870. Watson, 



Chall. Rep. Gastr., p. 024, 1886. 

 Auriculina insculpta Verr., Proe. U. S. Nat. Mus., III. p. 381, 1880. 

 Actceon nitidus Verrill, Trans. Conn. Acad., V. p. 540, pi. lviii. fig. 21, July, 1882. 

 1 Actceon exilis Seguenza, Form. Terz. Calabria, p. 251. 



Habitat. Off east coast of Florida, 150-200 fms., Dr. Rush ; Campechc 

 Bank, Gulf of Mexico, in 200 fms., Dr. Rush ; off Martha's Vineyard in 312- 

 487 fms., U. S. Fish Commission ; North Atlantic, Jeffreys, 227-1456 fms. 



The Calabrian fossils in the Jeffreys collection seem to be more inflated 

 anteriorly than the recent shells. 



Actseon pusillus (Forbes) Jeffreys. 



Tornatella pusilla Forbes, iEgean Rep., p. 191, 1843. 



Actaeon pusillus Jeffreys, Ann. Mag. Nat. Hist., 4th ser., VI. p. 84, 1870. Watson, 

 Chall. Gastr., p. 627, 1880. 



Habitat. Off Havana, Sigsbee, in 450 fms. Off Sand Key at Station 9, in 

 111 fms., bottom temperature 55°. 5 F. 



The description of Forbes is too vague, and being without a figure the spe- 

 cies may be regarded as rehabilitated by Jeffreys. The latter considers it 



