new Species o/" Pleurotoinidae. 499 



This species is of uniform reddish or purplish brown ; the 

 upper half of the whorls is concave and devoid of spiral lira- 

 tions, which exist onlj on the lower portion. 



Pleurotoma {DrilUa) digna. 



Testa ovato-fusiformis, sub epidermide tenui flavo-olivacea cseruleo- 

 cinerea; anfractiis 9, leviter convexi, costis obliquis superne 

 nodosis 13-14 (in anfr. ultimo versus labrum subobsoletis et 

 prope peripheriam evanidis) instructi ; anfr. ultimus sulcis an- 

 gustis pluribus circa basim insculptus ; apertura fusca, albo- 

 bifasciata, longitudinis totius quam \ paulo minor ; labrum tenue, 

 ad marginem album, superne minime profunda sinuatum ; colu- 

 mella versus basim callo albo induta ; canalis breviusculus, latus. 



Long. 26 mill., diam. 9. 



liab. California. 



The colour beneath the epidermis of a specimen in good 

 condition is a bluish ash ; but in worn examples the upper part 

 of the whorls and the middle of the body-whorl are broadly 

 banded with brown ; and these bands are seen in the aperture 

 of all specimens. A slight furrow or depression extends 

 around the whorls a little below the suture, and, traversing the 

 ribs, causes their upper ends to be nodulous. The sinus in 

 the labrum is situated at the termination of this depression. 



This species belongs to a group of Pleurotomida which 

 includes several Californian forms, viz. ; — P. inermis, Hinds ; 

 incisa, Carpenter ; penicillata, Cpr. ; moesta^ Cpr. ; aurantia^ 

 Cpr. ; erosa^ Schrenk ; and llrata^ A. Adams. 



Pleurotoma {CUonella) Bornii. 



Testa elongata, subturrita, albida, strigis rufis inter costas ornata, 

 epidermide cornea olivacea induta ; anfract. 8 ? (apice abrupto), 

 planiusculi, paidulum infra suturam linea impressa bipartiti, 

 leviterque constricti, longitudinaliter costati, costis interstitia 

 aequantibus, numerosis (in anfr. ultimo ad 18), striis spii'alibus 

 exilibus obsolete striafci ; apertura ovata, longitudinis totius ^ 

 a3quans, superne acuminata, basi canali brevissimo leviter recurvo 

 terminata ; columella medio leviter arcuata, vix tortaosa ; cauda 

 bre\is, carina circumdata ; labrum tenue, superne paululum infra 

 suturam baud profunde sinuatum. 



Long. 40 mill., diam. 12. 



Hob. Cape of Good Hope. 



This species is closely allied to the well-known P. sinuata, 

 Born. It differs, however, in being covered with a paler 

 epidermis, in having below the suture a raised girdle formed 

 by a depression or constriction around the whorls, and also in 

 the style of coloration. 



