276 BULLETIN OF THE 
gether different from Circe, and those forms of Cytherea which have somewhat 
similar teeth have the beaks and ligament different, and an angular pallial 
sinus. It seems to be worthy of a section to itself. 
Genus VENUS Line. 
Venus pilula Reeve. 
V. pilula Reeve, Conch. Icon. Venus, pl. xv. fig. 58, 1863. 
Valves were obtained by Sigsbee, off Havana, in 80 fms., and at Station 272, 
in 76 fms., Barbados, which appear to be referable to this species. 
Subgenus CHIONE Mercere v. MunLFELDT. 
Venus (Chione) pygmeea Lamarck. 
Venus pygmea Lam., An. s. Vert., 2me ed., VI. p. 337. Desh. Cat. Biv. Brit. Mus., 
p. 129. 
Venus inequvalvis D’Orbigny, Moll. Cuba, p. 277, pl. xxvi. figs. 88-40, 1846. 
Venus trapezoidalis Kurtz, Cat. N. and S. Car., p. 5, 1860 (fide Stm.). 
Habitat. Station 26, 110 fms., in the Gulf of Mexico; Yucatan Strait, 640 
fms. (valves). 
The shell is found living in Charleston Harbor and southward. 
Venus (Chione) cancellata Lamarck. 
V. cancellata Lam., An. s. Vert., V. p. 588, 1818. (? = V. dysera Linné.) 
Habitat. Gordon Key, 68 fms. ; off Havana, in 127 fms., drifted valves. 
It is abundant on the Floridian and Antillean coasts in moderate depths of 
water. 
Famiry PETRICOLIDZ. 
Genus PETRICOLA Lamarck. 
Petricola divaricata CuEmyitTz. 
Petricola divaricata (Chemn.) D’Orbigny, Moll. Cuba, II. p. 265, 1853. 
One valve was obtained by the “Bache” in 68 fms., near Gordon Key. The 
species is not rare, in proper places, in South Florida and through the whole 
Antillean region. 
