SOLARIIIMC. 7 



Heliacus, d'Orb., 1841, and Teretropoma., Roehebvune, 1881, 

 are s^'iionyms. AnLiUeH; Pacific 0. ; Indian 0. 



Subgenus Pseudomalaxts, Fischer, 1883. 

 Shell discoidiil, planorbiform ; whorls and aperture quadran- 

 gular. Operculum as in Torinia restricted. 



Mediterranea,n ; Madeira. 

 Subgenus Gyriscus, Tiberi, 18G8. 

 Shell turbinated, conically turriculated, umbilicated ; whorls 

 rounded, granulated, spirally sulcata and ribbed ; aperture sub- 

 circular, the simple margins united by a callous deposit. Oper- 

 culum externally- flat and multispiral, furnished internally with 

 a central stjdiform process (PL 1, fig. IT). Mediterranean. 



Subgenus Episcynia, Morch, 1875. 



Shell glassy ; periphery with a double series of cilia ; apex 

 sim[)le, direct. Cuba. 



Subgenus Climacopoma, Fisch., 1883. 



This subgeneric name was proposed b}^ Dr. Fisclier (Manuel 

 of Conchyliologie, Fasc, viii, p. 714) upon grounds purely hypo- 

 thetical. When Deshayes found in the Paris Basin a fossil 

 operculum having all the characters of the operculum of the 

 recent Torinia, he suggested that perhaps it belonged to Sola- 

 rium jmtulum. Lam., but never succeeded in finding it in posi- 

 tion. Dr. Fischer, anticipating the discovery of such a species, 

 with the shell of Solarium and the operculum of Torinia, has 

 proposed for the discovery, 3'et to be made, the above sub- 

 generic name. 



Genus OMALAXIS, Desh., 1830. 



Shell subdiscoidal, flat or slightly concave above ; whorls 

 carinated at the peripher^^ ; peristome not continuous ; umljilicus 

 wide and deep. Operculum multispiral. Bifrontia.^ Desh., 

 1832, is a synou3-m.' Coast of New England — Brazil. Fossil, 

 Eocene. 



{E uomphalinse.) 



Genus OPHILETA, Yanuxem, 1842. 

 Shell discoidal, planorbiform ; whorls numerous, in contact, 

 very convex. Fossil, Paleozoic. 0. levata, Hall. New York. 

 (Struct, and Syst. Conch., PL 65, fig. 19.) 



