74 



Bulletin 35 



232 



Page 91 



is very interesting. Among the recent shells are several 

 which are by no means common in the Westindies ; as for 

 instance the true Persona reticularis (Linn.) which though 

 nearly allied to must not be confounded with the P. cla- 

 thrata of Madagascar nor with the fossil P. similima of the 

 Westindian miocene. Dispacus glabratus occurs at Cumana : 

 and I have also from that place an undetermined species 

 of Fusus (which resembles young shells of Fasciolaria 

 gigantea except that it has a longer canal), and also the 

 following : Solarium tesselatum, Phos guadelupensis, Veyius 

 flexuosa, Calyptraea auriculata^ (of which apparently there 

 is a good figure in the large edition of Cuvier's Regne 

 Animal pi. 48, f. 4, under the name of C. cuvieri Desh. ) 

 Oliva reticidaris (several forms), and O. monilifera Reeve 

 Q=0. mutica Sa.y=nittdula) . 



Venus superba n. sp. PI. III. f 2. 

 Ovate, slightly subtrigonal, a little inequilateral, ven- 

 tricose ; anteriorly produced and rounded ; posteriorly 

 produced and subangulate ; umbones closely approximate ; 

 lunule large, striated with irregular diverging lamellae, 

 distinctly defined by a sharp groove : posterior dorsal 

 area large, striate, not distinctly defined. Valves marked 

 with numerous irregular angulate streaks of chesnut or 

 brown and adorned with numerous concentric crenate ribs, 

 which are rather more distant, thinner, and more distinctly 

 crenate near the anterior and posterior margins : on the 

 disk the ribs are square, flattened and polished, and the 

 crenation is less marked. Length 70, height 55, thickness 

 about 45 mm. 



Mactra anserina n. sp. PI. III. f 1. 

 Oval, compressed, subequilateral, gaping widely pos- 

 teriorly, anteriorly somewhat produced and subangular, 



