TRANSACTIONS OF WAGNER 

 1410 



TERTIARY FAUNA OF FLORIDA 



Subgenus Neocardia Sowerby, 1892. T)'pe A'', angiilata Sowerby. Recent. 

 South Africa. 



Hinge as in Cardites, except that long posterior laterals are present, with 

 no anterior laterals ; the cardinals are diminutive, the shell small and sub- 

 quadrate. 



Genus Calyptogena Dall, 1891. Type C. paciftca Dall. Pliocene and recent on 

 the Pacific coast of North America. 



Shell smooth or faintly concentrically striated, with a well-marked escut- 

 cheon but no lunule ; the inner margins smooth ; dental formula ^- '°'°-'° in- 



R. oioi.ol 



eluding an anterior lateral in each valve ; the teeth become more or less obso- 

 lete in the adult, and in the young retain the link between laterals and cardinals, 

 which in most bivalves is lost at a very earl}' age. 



Attention may be called here to the Mesozoic Paehycardia {rugosa) Hauer, 

 1857, from the Alpine Trias; to Prorokia Boehm, 1883, which I know only 

 through Zittel's citation of the name and date, and to Pseudocardia Conrad, 

 1866, changed b}^ him (on account of its similarity to P seudocardium Gabb, 

 1865) to Vetocardia in 1868, which in 1872 was stated by him to be a misprint 

 for Vetericardia, a group which has been involved in much confusion, but 

 which was intended to include the Cretaceous forms referred- to Venericardia 

 b}' Orbigny and is typified by Astarte crenalirata Conrad from the Ripley, 

 Alabama, horizon. All the above have been referred to this family. Cabralia 

 (Schmitsii) Boehm, 1899, from the Miocene of the Salvegens Islands, Azores, 

 has also been placed in the Carditidce, though it obviously belongs in the 

 VeneridcB, somewhere near Venerupis, if the author's figures may be relied on. 

 The supposed absence of a pallial sinus, which led the author to place it in 

 the CarditidcE, is paralleled in some species of Chione and other exceptional 

 VeneridcB. 



Subfamily THECALIIN.^. 



Marsupium in the ventral portion of the mantle, in the female, and pro- 

 tected by an infolding or indentation of the valves of the shell. 



Genus Thecalia H. and A. Adams, 1857. T3'pe Cardita concamerata Bruguiere. 

 Recent in South Africa. 



Hinge with two cardinals in each valve, the posterior right cardinal absent, 

 the middle one of the same valve large and prolonged behind ; there is an 

 anterior lateral in each valve. The male is without the marsupial pouch, gapes 



