XXXI V. 



CONC H YLl A—niTH VUA 



4, niiiiima, maculis quatuor sangtdneis. 



with four scarlet spots. 



5. orbiculata, decussalhn striata. 



with decussate strioe. 



30. Venus. 



* maroine interno crenulato. 

 with the inner margin notched. 



■\ orhiculo-cordatcs. 



orbicular heart-shaped. 



1. verrucosa, suhglobosa, latcribns verrucosis. 



nearly globular, warty at the sides. 



2. Casina, orbicularis, laminis subimbricatis. 



orbicular, with somewhat imbricate plates. 



3. rcflexa, niiticc subangulata laminis reflexis. 



a little angular at the anterior end, where the 

 plates are reflected. 



4. cancellata, laminis remotis crebro cancellatis. 



with remote plates which are closely cancellated 



5. subcordata, striis remotis longitudinulihus lamellas remotiores 



decussantibus. 



with remote loniiitudinal striae decussating the 



more remote plates. 



(1 grauulata, grannlatim decussata. 



decussate in a granular manner. 



7. fayciuta, coslis Jatis planatis Icevibus. 



with broad flat smooth ribs. 



