496 ^Ir. E. A. Smith's Diagnoses of 



sequans ; labrum tenue, prope suturam Icsiter sinuatum ; canalis 

 breviusculus. 

 Long. 20 mill., diam. 5^. 



JIah. China Sea. 



In this species the nuclear whorls are unusually large, the 

 rest are convex and only sliglitly excavated at the upper part. 

 The ribs are deeply cut across by the spiral sulcations, and 

 thus become nodulous, four or five nodules existing on a rib. 



Ple%irotoma {Drillia) incerta. 



Testa fusiformis. alba ; anfract. 12, primi 2 vitrei, convexi, cseteri 

 siipcrne dccUviter concaviusculi, deinde couvexi, costis leviter 

 obliquis superne versus suturas obsoletis, in anfr. superioribus 

 iuferne incrassatis (in anfr. ultimo 10 paululum peripheriam 

 infra desinentibus, una aliquanto post labrum maxima intiata) 

 instructi, liris striisque spiralibus et incrementi lineis obliquis 

 undique ornati ; apertura longit. totius ad 4 tequans ; labrum 

 tenue, margine crenulatum ; columella subreeta, callo superne 

 aliquanto incrassato induta ; canalis modice elongatus, recurvus. 



Long. 25 mill., diam. 7. 



Hah. New Guinea. 



The spiral lirations in this species are about six in number 

 in the upper whorls, and twenty in the last ; they do not exist 

 in the depression at the upper part of the whorls, which is 

 only finely striated. 



Pleurotoina {Drillia) multilirata. 



Testa ovato-fusiformis, lacteo-alba, versus apicem dilute lilaceo 

 tincta ; anfract. 10, primi 2 vitrei, convexi, cajteri medio angu- 

 lati, supra concave excavati, sutura simplici discreti, costis ob- 

 liquis plieseformibus medio incrassatis supra ac infra attenuatis, 

 supra vix suturam attingentibus (in anfr. ultimo 10 ad peri- 

 pheriam obsoletis) instructi, ubique transversim striati et tenuiter 

 crebreque lirati, liris 3-4 quam caeterae majoribus, supra plicas 

 aliquanto incrassatis, incrementi lineis striati ; apertura longitu- 

 dinis totius ^ aequans ; labrum tenue, superne sinu parvo inci- 

 8um ; canalis latus, bre%Tis. 



Long. 23 mill., diam. 7|. 



Hob. Port Jackson ? 



The transverse lirations are very numerous and regular. 



Pleurotoma [Drillia) consociata. 



Testa oblonga, subturrita, flavicans ; anfract. 10? (apice fracto), 

 superne ad suturam carina duplici cincti, infra banc concave 

 excavati, deinde costis crassis 6 (in anfr, ultimo paululum infra 

 medium evanidis) instructi, liris spiralibus 4 supra costas promi- 

 nentibus in iuterstitiis subobsoletis (in anfr. ultimo circa 16) 



