new Species q/'Pleurotomidse. 493 



Avhich are slightly noclulous on each rib, and the smooth con- 

 cavity at the upper part of the whorls are very distinctive 

 characters. 



Pleurotoma [Drillia) suhochracea. 



Testa elongata, fusiformis, turrita, rubido-ochracea ; anfract. 13, 

 supra valde excavati, deinde convexi, infra excavationem costis 

 plicosis (in anfr. ultimo 14 fere ad basim continuis) instruct!, 

 liris tenuibus supra costas subnodosis et albis (in anfr. penult. 5, 

 in ultimo circiter 22) et striis gracillirais numerosis incrementi- 

 que lineis ornati ; sutura marginata ; apertura carneo-alba, supeme 

 ovata, inferne in canalem mediocriter elongatum producta, longi- 

 tudinis totius ^ adsequans ; labrum extra costa validissima in- 

 crassatum, in excavatioue sinuatum ; columella tortuosa, callosa, 

 superne tuberculo parvo munita ; canalis recurvus. 



Long. 39 miU., diam. 11. 



Hah. China seas (probably). 



This handsome shell is very characteristically coloured. 

 The reddish-ochre colour is uniform, except where the trans- 

 verse lirations cross the ribs or plications, where they are white 

 and slightly nodulous. The excavation is well defined by the 

 sudden termination of the ribs. 



Pleurotoma [Drillia) mindanensis. 



Testa elongate ovato-fusiformis, turrita, sordide albida, inter costas 

 supra ac infra fusco maculata ; anfractus 12, primi 3 convexi, 

 laeves, politi, caeteri superne leviter excavati, medio angulati, 

 deinde concaviusculi, propeque suturam aliquanto constricti, costis 

 perobliquis flexuosis suturas attingentibus (in anfr. ultimo cir- 

 citer 13 versus basim obsoletis) instructi, et liris 4-5 gracilibus 

 supra costas prominentioribus subnodulosisque succinct! ; anfract. 

 ultimus ad peripheriam obtuse angulatus, albidoque zonatus, in- 

 ferne fuseescens, liris numerosis ornatus ; apertura longitudinis 

 totius I" aequans ; labrum tenue, margine crenulatum, medio pro- 

 minens, prope suturam valde incisum ; columella paululum con- 

 torta, superne tuberculata ; canalis leviter recurvus. 



Long. 29 mill., diam. 9. 



Hah. Island of Mindanao, Philippine Islands. 



The ribs in this species are flexuous and very oblique and 

 continuous up the spire ; but whether this latter be a constant 

 character I cannot say, as but a single example is at hand. 

 The obtuse angulation of the body-whorl at the periphery gives 

 it a squarish aspect. 



Pleurotoma {Drillia) rotundicostata. 



Testa acuminato-fusiformis, apice acuto, dilute fuseescens, epider- 

 mide tenui flavo-olivacea amicta ; anfr. 12, convexiusculi, su- 



