new /i^j>ecies o/ Pleurotomidffi. 495 



The spiral lirations in this species are particularly promi- 

 nent, es])ecially upon the ribs, Avhere in the body-whorl they 

 are developed into little nodules. 



Pleurotoma [Drillia) variahilis. 



Testa clavate fusiformis, siibrimata, fusco-lutea, rubro-fusco notata 

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

 lati, infra excavationem costis subtubercularibns 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) lineisque aliis tenuibus cincti ; anfract. ultimiis sub- 

 quadratus, basi modo paiihilum constrictus ; apertura intus laevis 

 pallide rosacea, longitudinis totius ^ adsequans, callo superne 

 tuberculoso induta ; canalis brevissimus, recurvus ; sinus latus 

 profundi usculus ; lal)rum extra incrassatum. 



Long. 34 mill., diam. 10. 



Var. Testa alba, fusco sparse punctata. 



Hah. ? 



This 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 fusca, inter costas 

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

 excavati, superne ad suturam oblique crenulati, costis rotuudatis, 

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

 structi, lii'is validis supra costas leviter incrassatis (in anfr. 

 superioribus 6-7, in ultimo circiter 10) succincti, undique incre- 

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

 gitudinis totius y*'y sequans ; labrum extra costa ultima maxima 

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

 tenui amicta, supra tuberculo parvo munita ; sinus mediocris ; 

 canalis brevis, recurvus, aurantiaco-fusco tinctus. 



Long. 26 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, Avhere the spiral lii-ations cross them. 



Plexirotoma [Drillia) angusta. 



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

 daque alba (interdum omnino alba) ; anfract. 9, apicales magni, 

 rotundati, cseteri courexi, infra suturam leviter concavi, costis 

 coufertis tuberculosis obliquis superne sutiiras vix attingentibus 

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

 instructi, sulcis spiralibus (in anfr. superioribus 5-6, in ultimo 

 circiter 16) iusculpti ; apertura parva, longitudinis testae gad- 



