CONCHYLIA— i>/Tiyyi?^. xxxv. 



•fl trigono-cordatcE. 



triangular heart-shaped. 



B. Dysera, lamellis remotis crebrd cancellatls. 



^vith remote plates which are closely cancellated. 



9. lamiijosa, hvmelUs memhranaceis confertis, crebrd cancellalis. 



with crowded merabranceous plates, -which are 

 closely cancellated. 



10. Galiina, striis suhlaminosis imhricatis l(evibus. 



with somewhat laminar imbricate smooth striae. 



11. pallida, costulis obtusis remotis reticulatis. 



with obtuse remote reticulate rib-like strise. 



12. ovata, costis longitudlnalibus trunsversim squamosis. 



with longitudinal ribs which are transversely scaly. 



** murgine interno integerrimo. 

 with the inner margin very entire. 



f oxalce. 

 oval. 



13. snbstriata, rxigis transversis obsoleth undatim reticidatis. 



with transverse ridges which are obscurely reti- 

 culate in an undulate manner. 



14. aenea, antich attenuata, obsolete reticulata. 



tapering at the anterior side, and obscurely 

 reticulate. 



!''>. Sarniensis, latere nntico tinnido obttiso. 



obtuse and tiunid at the anterior' end. 



* D. 2 



