TRANSACTIONS OF WAGNER 

 I 2 SO 



^ TERTIARY FAUNA OF FLORIDA 



This type appears confined to Atlantic watei-s ; no species has yet been 

 reported from the Pacific coast of the continent, recent or fossil. The species 

 of this section are the sole representatives in America of the genus Gafrariuin, 

 either recent or Tertiary, the Circe carbasea Guppy being a member of the 

 genus Pitaria, section Hyphantosoiiia; " Psephis" cancellata Gabb (Journ. 

 Acad. Nat. Sci. Phila., viii., p. 373, pi. xlvii., fig. 74, 1881), from the Pliocene 

 clays of Costa Rica, is very probably a species of Gouldia. 



Subgenus CIRCE Schumacher. 



Circe Schumacher, Essai, p. 152, 1817 (.Venus scripta L.) ; Gray, List Brit. An. Brit. 



Mus., p. 6, 1851 ; Morch, Cat. Yoldi, ii., p. 25, 1853; Romer, Krit. Unters., p. 15, 



1853; H. and A. Adams, Gen. Rec. Moll, ii., p. 428, 1857; Stoliczka, Cret. Pel. India, 



p. 152, 1871 ; Fischer, Man. de Conchyl., p. 1080, 1887. 

 <^Circe Gray, Analyst, viii., No. 24, p. 307, 1838; Deshayes, Cat. Conch. Brit. Mus., i., p. 



83, 1853; Tryon, Syst. Conch., iii., p. 179, 1884. 

 '^Circenita Jousseaume, Mem. Soc. Zool. de France, i., p. 208, 1888; Cythcrea arabica 



Lamarck. 



The subgenus may be divided as follows : 

 Section Circe Schumacher. 



Surface with only concentric sculpture ; valves compressed witji smooth, 

 compressed beaks, narrow lunule and escutcheon, the pallial line simple, and 

 the inner margins entire ; posterior right cardinal grooved ; ligament deeply 

 sunken but not hidden. T3'pe Venus scripta Linne. 



Section ParniitUna Dall. Type Circe cornigata (Dilhvyn) Deshayes. 



Surface with the umbonal region coarsely divaricately ribbed, the remainder 

 of the disk with strong concentric sculpture ; valves with the umbones flattened, 

 the remainder convex ; pallial line slightly flexuous behind ; inner margins 

 finely crenulate ; lunule and escutcheon narrow, flat ; ligament visible though 

 siuiken ; cardinals entire or faintly grooved. 



Section Circe nita Jousseaume. 



Surface feebly concentrically sculptured; valves convex, plump, the um- 

 bones not compressed, the posterior slope without specialized sculpture ; lunule 

 distinct, narrow ; the escutcheon hardly defined, the ligament little sunken ; the 

 middle cardinals feebly grooved ; the pallial line with a minute sinus ; the 

 inner margins of the valves entire. 



