240 Qit<^i icrly Journal of Conchology. 



46 Pleurotoma gracilis, n. s. 



F. ehngato-fi/sifonni, gracilis, cinerea intef nodidis fusco-inaculata; 

 anfr. plicato-noditlosis. crcberrime. striatis, spira. elongata, 

 canali acuminata ; labro margine acuto, sinu ample. 



Hab. West Africa. Captain Davis. 



This very slender shell is not like any of the forms figured. 



47 Pleurotoma (Drillia) filosa, n. s. 



P. testa acuminato-furrita ; anfr. convexis, carinis numerosis 

 piominentibus cinctis, intcrstitiis angustatibus, st/iis longitu- 

 dinalibus obliquis eleganter sculpt is ; albida, apice fusccsccnte 

 tincto ; canali brevissi/no ; sinu amplo. 



Hab. West Africa. 



A white shell, corded with transverse thread-like bands. The 

 PI. violacea, Hinds, PI. crispata, Crist. «S: Jan., and several others 

 are similarly corded and closely allied shells. 



4S Pleurotoma (Clavatula) diadema, Kien. 



49 P. do. virginea, Client. 



50 P. do. imperialis, Lam. 



51 P. do. muricata, Lam. 



52 P. (Genota) mitra^formis, IVood. 



53 P. (Perrona) spirata, Lam. 



54 P. do. mandarina, Smith. 



55 P. do. Perronii, Chcm. 



