TRANSACTIONS OF WAGNER 

 1078 



TERTIARY FAUNA OF FLORIDA 



Genus AVIOULAEIUM Gray. 

 Avicularium Gray, Ann. Mag. N. Hist., xi., p. 41, 1853. Type Cardium aviculare Lam. 

 Lithocardium Woodward, Man. Rec. and Fossil Shells, p. 291, 1854. 



Shell keeled laterally, subtrigonal, the hinge-line long, straight, mostly in 

 front of the umbones, and the hinge produced anteriorly. 



Section Aviculariiun s. s. 

 Valves closed. 



Section ByssocardiiDii Munier Chalmas, 18S2. 



Valves v^rith a byssal foramen on the anterior margin. Type Cardium 

 einarginatuiii Deshayes. 



Pterocardia (Agassiz) Bayan, 1874, founded on C. striatum Buvignier, 

 Mem. Soc. phil. de Verdun, ii., p. 5, pi. 3, figs. 20-21, 1843 (C Buvignieri 

 Deshayes), I have not seen, btit from Fischer's description it must be allied 

 to Avicularium if not identical. 



Goniocardium Vasseur, Journ. de Conchy!., xxviii., p. 182, 1880, has not 

 been well figured and is founded on G. Heberti Vasseur and Cardium rhachitis 

 of Deshayes. Cossmann refers it to Fraguin, but from the description given 

 by Vasseur it w^ould seem to resemble Avicularium. 



Genus PROTOCARDIA Beyrich. 



Protocardia Beyrich, Zeitschr. fiir Malak., p. 17, 1845. Type Cardium hillanum Sowerby. 

 Cretaceous. 



Protocardium Meek and Hayden, Proc, Acad. Nat. Sci. Phila., xii., p. 418, i86o; Coss- 

 mann, Cat. Illustr., p. 163, 1887. 



Nemocardium Meek, Pal. Upper Missouri, p. 172, 1876; C. semiaspcnuii Deshayes. 



Shell globose with a posterior area sharply distinguished by sculpture from 

 the rest of the surface ; closed ; hinge normal, with no lunvde or escutcheon. 



Section Protocardia s.s. 

 Posterior area sculptured with smooth radial ribs, the remainder of the 

 surface with concentric striation. 



.Section Nemocardium Meek. 

 The posterior area spinose or tuberculate, the remainder of the surface 

 finely radially striate, or finely reticulate ; the anterior laterals springing from 

 the umbonal cavitv. 



