42 Mr. E. A. Smith on Species of 



Although in many respects similar to P. Hanleyi, I think 

 the strong uniform sulcations, the narrow non-dilatate aper- 

 ture, and the very thick outer lip are sufficient distinctions to 

 separate the two forms. 



It is also somewhat similar to P. castaneus, from which it 

 is distinguished by stronger but less numerous spiral sulca- 

 tions ; and the lirations are twice as numerous within the lip^ 

 which is thick at the margin, and not acute as in P. castaneus. 



17. Planaxis niger. B.M. 



Planaxis nigra, Quoy, Voy. Astrolabe, p. 49, pi. 33. figs. 22-24. 

 Hah. New Ireland. 



18. Planaxis atropurpureus. B.M. 



Planaxis atropurpurea, R^cluz, Revue Zool. 1843, p. 261. 



^/6em/, Dunker, Novit. Conchol. Suppl. ii. p. 16, pi. 2. figs. 35-37. 



Hah. South Seas [Recluz) ; Loanda [Dhr.). 



19. Planaxis lahiosus. B.M. 



Planaxis labiosa, A. Adams, Proc. Zool. Soc. 1851, p. 272. 



plumbea, Pease, Proc. Zool. Soc. 1861, p. 244. 



Bronni, Dunker, Malak. Blatt. 1862, p. 41. 



Hah. Sandwich Islands. 



20. Planaxis tceniatus. 



Planaxis ttsniattcs, Philippi, Zeitschrift fiir Malak. 1848, p. 165. 

 Hah. ? 



21. Planaxis Gouldii. 



PMnaxis cingulata, Gould, Proc. Bost. Soc. Nat. Hist. vol. vii. Dec. 1860; 

 Otia Conch, p. 140. 



Hah. Ousima {Gould). 



The name cingulata having been applied ten years pre- 

 viously to another species by A. Adams, I here change it to 

 that of Gouldii. 



22. Planaxis cingulatus. B.M. 



Planaxis cingulata, A. Adams, Proc. Zool. Soc. 1851, p. 271. 

 Hah. China Seas. 



23. Planaxis ehoreus. B.M. 



P. testa parva, alba, ovato-acuminata, apice piceo ; anfr. 8, convexi- 

 usculi, valide spiraliter siilcati ; costae inter sulcos dimidiatas, in 

 anfr. ultimo 14, basi miniraae ; apertura ovata ; labrum margine 



