new Species ofPleurotomidEe. 303 



The distinct rimation and the livid purplish flesh-colour arc 

 the chief characters of the species. 



Pleurotoma [Drillia) essingtonensis. 



Testa elongate fusiformi-ovata, rubro-fusca, circa anfractuum mediuni 

 liris duabus albis cincta ; anfract. 10, primi 3 laeves, politi, ca^tori 

 convexiusculi, superne leviter concavi, ad suturam incrassa- 

 tione creniilata ornati, costis obliquis (in anfr. ultimo 11 basim 

 versus obsoletis, ultima pone labrum validissima) instructi, liris 

 spiralibus ad 8, circa medium duabus supra costas albis quam 

 caeteris majoribus, cincti, incrementique lincis striati ; anfr, ulti- 

 mus liris circa 25 ornatus, tribus paululum infra medium albis ; 

 apertura longit. totius -^ adsequaus ; columella callosa ; sinus 

 mediocris ; canalis brevis, recurvus. 



Long. 20 mill., diam. 6. 



Hab. Port Essington, North Australia. 

 The spiral lirations are somewhat thickened on the ribs, 

 thus producing a subnodulous appearance. 



Pleurotoma {Drillia) parva. 



Testa ovata, fusco-alba, prope suturam fuscescens, circa anfr. ultimi 

 medium supra costas punctorum fuscorum serie unica et zona 

 pallidiore infra illam, ornata ; anfract. 6, primi 2 laeves, coeteri 

 superne juxta suturam constricti, deinde planiusculi, costis su- 

 perne nodulosis (in anfr. ultimo 9, ad basim liris spiralibus 4-5 

 circa caudam interruptis) instructi, increment! lineis striati ; 

 apertura longitudinis totius |- adsequaus ; columella callo crassi- 

 usculo iiiduta ; sinus profundus ; labrum tenue. 



Long. ^^ mill., diam. 3. 



Hah, Gulf of Suez {Mac Andrew). 



The last rib on the body-whorl, which is situated at some 

 distance from the margin of the labrum, is much larger than 

 the others and is stained with brown. The slight constriction 

 a little below the suture gives the ribs a nodulous aspect at 

 their upper ends. A similar appearance exists at the bottom 

 of the ribs on the last whorl, occasioned by a like depression. 



Pleurotoma {Drillia) jucunda. 



Testa acute ovata, spira alba, circa medium anfractuum et inferne 

 ad suturam linea fusco-coruea ornata, anfr. ultimi dimidio infei'iore 

 lutescente, paululum infra medium serio spiral! guttarum alba- 

 rum cincto ; anfract. 7^ convexiusculi, superne leviter constrict!, 

 loiigitudinaliter costati, costis superne attonuantibus (in anfr. 

 ultima 10 aliquanto infra medium evanidis) instructi, spiralitcr 



