FREE INSTITUTE OF SCIENCE 



TERTIARY FAUNA OF FLORIDA ^ ^ 



Order ANOMALODESMACEA. 

 Superfamily POROMYACEA. 



FAMILY CUSPIDARIID^. 

 Genus CUSPIDARIA Nardo. 



Ryderia Wilton, Quart. Phil. Journ., 1830, p. 73. No type named. 

 Cuspidaria Nardo, Revue Zool., p. 30, 1840; Ball, Bull. Mus. Comp. Zool., xii., p. 292, 



Sept., 1886; Proc. U. S. Nat. Mus., xii., p. 279, 1889. Type Tellina cuspidata Olivi. 

 Neara Gray, Griffith's Cuvier, legend to plate xxii., fig. 5, 1833 (the volume dated 1834), 

 type N. chinensis Gray in Index, p. 598 ; Gray, Synopsis Brit. Mus., 1840, fide Gray 

 in P. Z. S., 1847, p. 192. 

 Not Ne&ra Robineau Besvoidy, 1830, Dipt era. 



This group has been fully discussed in the two papers of mine above re- 

 ferred to, while the anatomy has also been more fully inquired into by Thiele 

 and Ridewood. 



The subdivisions adopted in this family are as follows : 



Genus Cuspidaria Nardo. Type C. cuspidata (Olivi). 



Siphons elongate; valves with a resiliifer and one or more teeth in the 

 hinge. 



Subgenus Cuspidaria s. s. 



Valves smooth or concentrically feebly sculptured, fossette posteriorly in- 

 clined and attached to the hinge-margin by its posterior edge ; one posterior 

 lateral tooth in the right valve. 



Subgenus Cardiomya A. Adams, 1864. Type Necera Gouldiana Hinds. 



Valves with radiating sculpture, and the fossette more vertical and promi- 

 nent ; otherwise like Cuspidaria s. s. 



Subgenus Leiomya A. Adams, 1864. Type Necera adunca Gould, not Smith. 



Surface as in Cuspidaria s. s. ; hinge with an anterior cardinal in each 

 valve, anterior and posterior laterals in the right valve, left valve without de- 

 veloped laterals ; fossette as in Cuspidaria s. s. 



Subgenus Pseudonecera Sturany, 1900. Type P. thaumasia Sturany. Red Sea. 



Shell resembling Leiomya in form, the hinge with, in the right valve, two 

 prominent projecting laminae, one in front and one behind, the small and shal- 

 low fossette recalling the diverging laminae of Rochefortia but more prominent 



