POMATIAS. 267 



rotundis ; sutura profunda; striis crebris crassis, super anfractuiu 

 ultimum alternatim brevioribus ; apertura subrotuuda; labro re- 

 trorsum reflcxo, duplicato, angusto. 06s. This little whitish 

 shell has the whorls separated by a deep suture, a roundish mouth 

 with the peritreme reflected backwards, and the strise, which are 

 thick and regular on the earlier whorls, are on the last alternately 

 shortened. 



