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TERTIARY FAUNA OF FLORIDA ^ ' ^ 



Section Nuttallia Dall, 1898. Type 5". Nnttallii Conrad. 



Shell large, suborbicular, inequivalve, more or less twisted, the right valve 

 slightly flatter, the posterior cardinal in the left valve obsolete ; the pallial sinus 

 narrower in front and somewhat detached from the pallial line. 



This group comprises a few species from California and Japan. 



Section PsammoteUina Fischer, 1887. Type Psaiiiiiiotclla ambigua 



Desh. 



Shell like Saiiguiiiolaria but more compressed, with the pallial sinus long 



and narrow, confluent with the pallial line below ; the callosities of the nymphs 



wide and more or less excavated, as if for an internal ligament, below ; hinge 



as in Nuttallia. 



Section Elisia Gray, 1854. Type Solen orhiculatus Wood. 

 Shell very inequilateral, equivalve, with the anterior side reduced ; subor- 

 bicular; the pallial sinus free from the pallial line and ascending; otherwise 

 as in Nuttallia, except that a third cardinal is persistent in the right valve. 



There are several species in the American Cretaceous which have been 

 referred to Sanguinolaria, but the Tertiary species are few and all more or 

 less doubtful in their generic relations. 5". uiiioides Guppy is from the Ter- 

 tiary (Oligocene?) of Trinidad. The following are tellinoid and probably 

 Macomas: 6". Whitneyi Gabb, 5". calif ornica Conrad, 5. fusca Say, and S. 

 lusoria (Say) Conrad. 5'. iiiiiiiata Gould and 5. purpurea -Deshnyes, of the 

 Gulf and Central American Pacific coast, are synonyms of S. tellinoides A. 

 Adams. S. decora Hinds is a synonym of ^. {Nuttallia) Nuttallii Conrad. 

 Sanguinolaria f caudata White, from the basal Eocene beds of Puget Sound, 

 at Carbonado, Washington, is a remarkable shell, like a greatly prolonged 

 Unio, of which the hinge and systematic relations are not yet known. 



The superficial appearance of Gari alata Gabb is that of a Sanguinolaria. 

 The Gari texta of the same author recalls Psainmotella, but of neither is the 

 hinge or interior known. The former is said to be Pliocene, and the lattA" is 

 referred to the Tejon Eocene of Martinez, California, by Gabb. 



Genus AMPHICH^ENA Philippi. 

 Amphichwna Philippi, Arch. f. Naturg., xiii., p. 61, 1847; Fischer, Man. Conchyl., p. 1104, 



1887. Type A. Kindermannii Phil, loc. cit., pi. iii., fig. 7 ; Mazatlan. 

 Ampliidona " Phil.," Morch, Journ. de Conchyl., vii., p. 137, 1858 (? lapsus calami). 

 Not Amphichcana H. and A. Adams, Gen. Rec. Moll., ii., p. 391, 1856. 



