new Species of Flcuvotom'nl-js. 489 



This sj)ccies is remarkable for the numerous subcqual keels 

 or liratit)iis, 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 sculj)turing, consisting of a kind of 

 j)uckering lA' very short and oblique tiiread-like lines. 



Pleurotoma NelUce. 



Testa fusiformis, turrita, alba ; anfr. 12, supra valdc cxcavati, 

 inferno angulati, infra suturam carinis duabus parvis coutiguis 

 cincti, et versus basim tuborculis loiigitudinuliter oblongis rectis 

 (in anfr. ultimo ad 1(5) seriatim coronati, et striis spiraliljus in 

 excavationc sod proccipue inter tubercula omati ; anfr. ultimu?> 

 infra tuborculorum seriem liris vididis (suporioribus 2 (juam 

 ctetera) majoribus) succinctus ; apertura cum canali longitudinis 

 testse \ ni^uans ; labrum tonne, suporne ad excavationom inci- 

 8um ; canalis elongatus leviter obliquus, paululum retrorsus. 



Long. 31 mill., diam. 10. 



Hah, Mauritius. 



A species of charming form and purity, with whorls strongly 

 excavated above, and a row of upriglit oblong tubercles encir- 

 cling their bases, and two small contiguous keels around them 

 just below the suture. 



Pleurotoma ceylonica. 



Testa fusfonnis, griseo-albida, infra suturam inacidis rufis varie- 

 gata et circa anfract. ultimi medium flammulis elongatis iuferne 

 productis ornata ; anfract. 10|, primi \\ vitrei, poHti, convexi, 

 caeteri paululum infra suturam concavi, cingidis spiralibus 6 gra- 

 nosis succincti (tortio a summo quam ca^tera minore), sutura dis- 

 tincta, fere canaliculata, discrcti ; anfr. ultimus cingulis ad 20 

 succinctus ; columella levissime tortuosa ; apertura intus fascia 

 unicarufescente ornata, longitudinis testa) ^ baud a^quans ; labrum 

 tenue, medio promincns, supcrne ad cingulura parvura anguste 

 sod baud profundo incisum ; canalis mcdiocritcr elongatus, leviter 

 recurvus. 



Long. 19 mill., diam. 6^. 



ll(ib. 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. 



Pleurotoma ocutigemmata. 



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

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

 cariiiati (carina superioro nndulata), supra carinam maximam 

 Forie epirali granulorum acutorum cincti ; anfr. idtimus paululum 



