new /S^eciVso/Pleurotomidge. 495 



The spiral lirations in this species are particularly promi- 

 nent, esj)ecially upon the ribs, where in the bocly-whorl thej 

 are developed into little nodules. 



Pleurotoma [DrilUa) variabilis. 



Testa clavate fusiformis, subrimata; fusco-lutca, rubro-fusco notata 

 prsecipue infra suturam ; anfract. 12, siipra concavi, medio angu- 

 lati, infra excavationem costis subtubercularibus inferne versus 

 suturas fere obsoletis (in anfr. ult. 10 baud ad basim attingenti- 

 bus) instructi, liris spiralibus 3-4 (in anfr. ultimo circiter 15 

 subgranosis) bneisque aliis tenuibus cincti ; anfract. ultimus sub- 

 quadratus, basi modo paululum constrictus ; apertura intus la^vis 

 pallide rosacea, longitudinis totius |- adaequans, callo superne 

 tuberculoso induta ; canalis brevLssimus, recurvus ; sinus latus 

 profundi usculus ; labrum extra incrassatum. 



Long. 34 mill, diam. 10. 



Var. Testa alba, fusco sparse punctata. 



Hah. ? 



TJiis species is remarkable for the squarish body-whorl and 

 the very short canal and aperture. The lirations, where they 

 traverse the plications, are whitish. 



Pleurotoma [Drillia) Atkinsonii. 



Testa ovato-fusiformis, flavescens, ad apicem fusea, inter costas 

 roseo-fusco maculata ; anfract. 11, convexi, superne, pauluhim 

 excavati, superne ad suturam oblique crenulati, costis rotundatis, 

 supra fere obsoletis (in anfr. ultimo 8-9 basi desinentibus) in- 

 structi, liris validis supra costas leviter incrassatis (in anfr. 

 superioribus 6-7, in ultimo circiter IG) succincti, undique incre- 

 menti lineis obliquis ornati ; apertura intus saturate fusca, lon- 

 gitudinis totius -f^ cequans ; labrum extra costa ultima maxima 

 incrassatum, intus roseo-album ; columella livido-fusca, caUo 

 teuui amicta, supra tuberculo parvo munita ; sinus mediocris ; 

 canalis brevis, i-ecurvus, aurantiaco-fusco tinetus. 



Long. 2Q mill., diam. 8. 



Hah. ? 



The lines of growth in this species are particularly apparent. 

 The ribs on the body-whorl are slightly nodose at their lower 

 part, where the spiral lirations cross them. 



Pleurotoma {DrilUa) angusta. 

 Testa angusta, elongata, fusiformis, dilute luteo-fusca, apice cau- 

 daque alba (interdum omnino alba) ; anfract. 0, apicales magni, 

 rotundati, caeteri convexi, infra suturam leviter concavi, costis 

 coufertis tuberculosis obliquis superne suturas vix attingentibus 

 (in anfr. ultimo 15, paululum infra peripheriam desinentibus) 

 instructi, sulcis spiralibus (in anfr. superioribus 5-G, in ultimo 

 circiter IG) insculpti ; apertura parva, lo)igitudinis testse gad- 



