308 Mr. E. A. Smith on 



totiiis Y^u adsequans ; columella callosa, superne tuberculata; 

 labrum extus incrassatum ; canalis brevissimus, recurvus. 

 Long. 10 mill., diam. 3. 



Hab. California. 



On the back of the body-Avhorl there is a kind of swollen 

 rib and the spiral striation has a semipunctate appearance. 



Pleurotoma [DrilUa) disjecta. 



Testa breviter fusiformis, nitens, alba, inter costas dilute f usco tincta ; 

 anfract. 8, primi 2 convexi, lyeves, cseteri convexiusculi, paululum 

 infra suturam undulatam sulco angusto bipartiti, longitudinaliter 

 costati, costis superne supra sulcum nodulosis, inferno crassis (in 

 anfr. ultimo 10 versus basim attenuantibus) ; anfr. ultimus pone 

 labrum haud costatus circa caudam albam liris ad 6 cinctus, in 

 tergum fuscescenti maculatus ; apertura parva, longitudinis totius 

 ■^ adsequans ; columella callo juxta suturam incrassato labroque 

 juncto induta ; sinus magnus, profundus ; canalis brevis, fusces- 

 cens, recurvus. 



Long. 7^ mill,, diam, 2|, 



Eah. Persian Gulf {Colonel Pelly) ^ China Sea, and Ovalau, 

 Fiji. 



In one specimen the furrow or depression a little below the 

 suture is well defined, producing an undulating keel above it. 



Pleurotoyna {DrilUa) Gookei. 



Testa fusiformis, nitens, rubescens, circa medium anfractuum obscure 

 pallide zonata ; anfract. 7, primus magnus, lajvis, cseteri convexi- 

 usculi, longitudinaliter costati, costis crassis, flexuosis, in anfr, 

 ultimo 10 versus basim attenuatis sed subito liris gracilibus ad 8 

 circa caudam abruptis ; anfr, ultimus zona secunda pallida infra 

 medium indistincte ornatus ; apertura superne ovata, inferne con- 

 tracta, longit. totius -^ adoequans ; sinus magnus, profundiuscu- 

 lus ; canalis subelongatus, recurvus, dextrorsum inclinatus ; colu- 

 mella callo tenui superne labro juncto induta. 



Long. 6 1 miU., diam, 2. 



Hah. Jamaica. 



This little species is unlike any other in the family. I 

 liave named it after the Rev, A. H. Cooke, who, besides other 

 valuable work, has done much to clear up the errors which 

 occur in the collection of the late R. MacAndrew, and wlio 

 kindly presented the six specimens of this species in the Mu- 

 seum. 



Pleurotoma {Crasstspira) hifarca. 

 Testa elongata, pyramidalis, lutescens, inter tuberculas nigro tincta ; 



