neio species of Vlcurotom'id^e. 499 



This species is of uniform reddish or purplish brown; the 

 ujjpcr li:ilf (if the whorls is concave and devoid of spiral lira- 

 tions, which exist only on the lower portion.- 



Pleurotoma {Drillla) digna. 



Testa ovato-fusiformis, sub epidermide tcnui flavo-olivacea oaeruleo- 

 cinerea ; anfractus 9, leviter convexi, costis obliquis supeme 

 nodosis i;?-ll- (in anfr. ultimo versus labrum siibobsoletis et 

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

 fjustis pbiri])us circa basira insculptus ; apertura fusca, albo- 

 l)it'asciata, longitudinis totius quam \ paulo minor ; labrum tenue, 

 ad margincm album, superne minime profunde sinuatum ; colu- 

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



Long. 20 mill., diam. 9. 



Hah. 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 tlie 

 ribs, causes tlieir 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 Pleurotomidae which 

 includes several Californian forms, viz. : — P. mermts, Hinds ; 

 i'ncisa, Carpenter ; penicillata, Cpr. ; mcesta, Cpr. ; aurantia^ 

 Cpr. J erosaj Schrenk ; and lirata, A. Adams. 



Pleurotoma (ClioneUa) Bornii. 



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

 epidermide coraea olivacea induta ; aufract. 8 ? (apice abrupto), 

 planiusculi, paidulum infra suturara linea imprcssa bipartiti, 

 leviterquo constricti, longitudinalitcr costati, costis interstitia 

 aiquantibus, numcrosis (in anfr. ultimo ad 18), striis spiralibus 

 exilibus obsolete striati ; apertura ovata, longitudinis totius \ 

 icquans, superne acuminata, basi canali brcA^issimo leviter recurve 

 terminata ; columella medio leviter arouata, vix tortuosa; cauda 

 brevis, carina circumdata ; labrum tenue, superne ])aululum infra 

 suturam baud profunde sinuatum. 



Long. 40 mill., diam. 12. 



Hah. Cape of Good Hope. 



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

 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 wliorls, and also in 

 the style of coloration. 



