new Species t^ Pleurotomidfe. 493 



which are slightly nodulous on each rib, and the smooth con- 

 cavity at the upper part of the whorls are very distinctive 

 characters. 



Pleurotoma [DrilUa) suhochracea. 



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

 supra valde excavati, doinde convoxi, infra cxcavationcm coslis 

 plicosis (in anfr. ultimo 14 fere ad basira contiiiuis) instructi, 

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

 in idtimo circiter 22) et striis gracillirais numerosis incrementi- 

 que linois ornati ; sutura marginata ; apertura cameo-alba, superne 

 ovata, infeme in canalem mediocriter elongatura producta, longi- 

 tudinis totius 4 ada^quans ; labrum extra costa validissima in- 

 crassatum, in excavatione sinuatum ; columella tortuosa, callosa, 

 superne tuberculo parvo miuiita ; canalis recurvus. 



Long. 39 mill., diam. 11. 



Uah. 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) tidndanensis. 



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, 

 delude concaviusculi, prope(iue suturam aliquanto constricti, costis 

 perobli(juis flexuo.sis suturas attingentibus (in anfr. idtimo cir- 

 citer 13 versus basim oljsoletis) instructi, et liris 4-5 gracihbus 

 supra costas prominentioribus subnodulosisque succincti ; anfract. 

 lUtimus ad peripheriam obtuse angulatus, albidoque zonatus, in- 

 feme fuscescens, liris numerosis ornatus ; apertura longitudinis 

 totius 4 aequans ; labrum tenue, margine crenulatum, medio pro- 

 miuens, prope suturam valde incisum ; columella paululura con- 

 torta, supenie tuberculata ; canalis levit^'r recurvus. 



Long. 29 mill., diam. 9. 



HcJ). Island of Mindanao, Philippine Islands. 



The ribs in this species are flexuous and very oblique and 

 continuous up the si)irc ; but whether this latter be a constant 

 character I cannot say, as but a single exani|)le 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 fuscescens, cpidcr- 

 mide tcnui flavo-olivacca amicta ; anfr. 12, convcxiusculi, su- 



