new Species q/Tleurotomidae. 489 



This species is remarkable for the numerous subequal keels 

 or lirations, none of them being very large. A double one 

 a little above the middle of the whorls has above and below 

 it a very peculiar style of sculpturing, consisting of a kind of 

 puckering of very short and oblique thread-like lines. 



Pleurotoma Nellice. 



Testa fusiformis, turrita, alba ; anfr. 12, supra valde excavati, 

 inferue angulati, infra suturam carinis duabus parvis contiguis 

 cincti, et versus basim tuberculis longitudiualiter oblongis rectis 

 (in anfr. ultimo ad 16) seriatim coronati, et striis ppiralibus in 

 excavatione sed prajcipue inter tubercula ornati ; anfr. ultimus 

 infra tuberculorum seriem liris validis (superioribus 2 quam 

 caeterae majoribus) succinctus ; apertura cum canali longitudinis 

 testae g aequans ; labrum tenue, superne ad excavationem inci- 

 8um ; can alls elongatus leviter obliquus, paululum retrorsus. 



Long. 31 mill., diam. 10. 



Hah. Mauritius. 



A species of charming form and purity, with Avhorls strongly 

 excavated above, and a row of u])right oblong tubercles encir- 

 cling their bases, and two small contiguous keels around them 

 just below the suture. 



Pleurotoma ceylonica. 



Testa fusformis, griseo-albida, infra suturam luaculis rufis varie- 

 gata et circa anfract. ultimi medium flammulis elongatis inferne 

 productis ornata ; anfract. 10|, primi 1^ vitrei, politi, convexi, 

 caeteri paululum infra suturam concavi, cingulis spiralibus 6 gra- 

 nosis succincti (tertio a summo quam caetera minore), sutura dis- 

 tincta, fere canaliculata, discreti ; anfr. ultimus cinguKs ad 20 

 succinctus ; columella levissime tortuosa ; apertura intus fascia 

 unicarufescente ornata, longitudinis testae i baud aequans ; labrum 

 tenue, medio prominens, superne ad cingulura parvum anguste 

 sed baud profunde ineisum ; canalis mediocriter elongatus, leviter 

 recurvus. 



Long. 19 mill., diam. 6^^. 



Hah. Ceylon. 



The entire surface of this species consists of spiral contigu- 

 ous series of granules ; the third row from the top of the 

 whorls being smaller than the others produces a depression in 

 that region. 



Pleurotovia acutigemmata. 



Testa cylindraceo-fusiformis, fusco-flava ; spira elongata, acuta ; 

 anfr. 12-13, medio carina maxima, acuta angulati, ad suturas 

 carinati (carina superiore undulata), supra carinam maximam 

 serie spirali granulorum acutorum cincti ; anfr. ultimus paululum 



