404 MR. E. A. SMITH ON SHELLS FROM ADEN. [June 16, 



spots of a brownish tint. Tiie extremity of the canal is stained with 

 a darker tint. The upper part of the whorl is divided off by an 

 impressed line forming an infra-suturai convex band which is more 

 or less nodose. 



This is an extremely rare species, the tvpe in the British Museum 

 being the only specimen previously recorded, and a single example 

 only was obtained by Major Yerbury. 



30. Pleurotoma (Drtllia?) Virginia, Beck. 



Hab. Mouth of the Gambia {Reeve). 



In the British Museum are four specimens from Bombay, presented 

 by W. T. Blanford, Esq., which agree precisely with Reeve's figure 

 and description. 



PL tuberculata. Gray, very closely resembles this species, but the 

 canal appears slightly longer. Tryou \ in carrying out his system 

 of " lumping," unites with Olavatula muricata this and several other 

 species, which in my opinion should be kept separate. 



31 . Pleurotoma (Drillia) baynhami. (Plate XXXIII, fig. 2.) 

 Testa fusiformis, tarrita, dilute flavo-fuscescens, pone castas fusco 



tincta ; anfractus \2, primi duo Iceves, globosi, subpellucidi, 



cceteri supra medium concavi, inferne convexi, infra suturam 



marginati, costis longitudinalibus supra medium evanidis (in 



anfract. penultimo 9-1 0) instructi, lirisque spiralibus tenuibus 



aibis ornati ; anfr. ultimus inferne angustatus, pone labrum 



varice magno convexo instructus, costis inferne attenuatis et 



flexuosis ornatus ; apertura longit. totius f fere cequans, intus 



livida ; columella vix arcuata, callo tenui superne tuberculo 



parvo munito induta ; sinus haud profundus, mediocriter latus. 



Longit. 29 millim., diam. 9 ; apertura 1 1^ longa, 3^ lata. 



Like Brillia suturalis. Gray, this species has a raised fillet at the 



suture ; but it may be distinguished by its shorter body-whorl, its 



more pronounced costee, and the difference of colour. The costse 



become obsolete a little above the middle of the whorls where the 



concavity commences, and, being traversed by a distinct white spiral 



thread, have a somewhat angulated appearance. 



32. MuREX scoLOPAX, Dillwyn. 



Hab. Red Sea, Persian Gulf; Aden {Garamagna). 



Tryon has united with this species M. occa, Sowerby, and M. 

 macgillivrayi, Dohrn, two forms which in my opinion are very 

 different. 



33. Murex ternispina, Lamarck. 



Hab, Red Sea, Indian Ocean, China, Phihppines, Japan. 



I am inclined to believe with Tryon that M. aduncospinosus is 

 the same as this species, but I think M. martinianus and M. troscheli 

 should be kept distinct. 



1 Man. Conch. toI. \i. p. 229. 



