xxxii, COJ^CHYLIA—DJTHYRA 



3. divaricata, striis utrinqub rectangidosts. 



the striae rectangular on both sides. 



30. Cryptodon. 

 1. flexuosus, Ctypfodon. 



31. DONAX. 



* margine interno denticulato. 

 with the inner margin toothed. 



1. Trunculus, striis longitudinalibus l<evibus. 



with the longitudinal striae smooth. 



2. denticulata, striis longitudinalibus punctatis. 



with the longitudinal striae punctured. 



** margine interno integerrimo. 



with the inner margin very entire. 



3. complanata, vitta albd longitudinali. 



with a single white longitudinal band. 



4. plebeia. vittis dnabus fulvis longitudinalibus. 



with two fulvous longitudinal bands. 



5. rubra, vinacea immaculata Itsvis. 



of an uniform pale claret-color and smooth. 



32. Capsa. 



1. castanea, castaneo-rubra, vittd longitudinali saturatiori 

 subarcuatd. 



bright cheinut, with a deeper and somewhat 

 curved longitudinal baud. 



