Zoological Society. 69 



irreffulai'ibus ruguloso ; suturd imjiressu ; afpertiird circulari; 

 peritremate diiplici ; intei'no simplici, superne emarginato ; ex- 

 terna tenui, lato, planiusculo, supra ascendente, fornicato, dein 

 cotnpresso ; umbilico patido ; anfractibus intus distinctis. 



Long. 1^ ; lat. -^-^ ; alt. ^^ unc. 



Belonging to the genus Pterocyclos of Benson. 



14. Cyclostoma biciliatxjm. Pterocyclos biciliatiim, Mousson, 

 Land- und Siiss. Moll, von Java, p. 49. t. 20. fig. 9. 



Several individuals of this species having been received, its locality- 

 is thus fixed. It is observable that the complete shell, which was 

 not known to Mousson, exhibits a tubular spiracle near the aperture, 

 similar to that apparent in C. spiracidiim, Sow. ; also, that the aper- 

 ture is circular, depressed, with the peritreme white, expanded, 

 slightly reflected, and at the upper part faintly undulated. 



15. ScARABUS PLicATUS, Fer. var. major. 



This variety, in place of the usual purple colour of the shell, ex- 

 hibits a deep yellow ground, with four broad baiids of dark brown 

 colour. 



16. ScARABUS BoRNEENSis, A. Adams. 



17. Auricula subnodosa, nobis. A. testa ovato-oblongd, 

 crassd, albd, epidermide castaneo-fuscd, infra suturas deciis- 

 satini granosd, medio Icevi, ad basim striis decussatd ; anfrac- 

 tibus convexiusculis, suturis distinctis, subcrenulatis ; anfractu 

 ultimo supernb longitudinaliter plicato-subnodoso ; aperturd 

 medio paidulum angustatd; columella biplic at d. 



Long. 2^0" ; lat. l-^-^ unc. 



A species distinguishable from A. Midce by the convexity of the 

 upper whorls and the smoothness of their lower halves, the depth of 

 the sutures, and the longitudinal nodulous folds which surround the 

 upper part of the final whorl : the aperture is also proportionally 

 wider than in A. Midce. In the single specimen received, the colu- 

 mellar lip has an interior protuberance above the upper fold. 



18. Auricula polita, nobis. A. testa ovato-oblongd, basi an- 

 gustiore, spird brevi ; epidermide castaneo-fuscd, nitidd ; striis 

 numerosis minutissime granulosis circumdatd, granis superius 

 distinctioribus ; aperturd medio coarctatd ; colunielld tripli- 

 catd, plied infimd lineari. 



Long. 1^ ; lat. -^^ unc. 



Although the characters of the aperture resemble those of ^. Judce, 

 the form of the shell differs entirely in its greater breadth, and in the 

 shortness of the spire. 



19. Auricula felis. Lam. 



20. Auricula mustelina, Desh. 



21. Neritina crepidularia. Lam. Conch. 111. fig. 25. 



22. Neritina Beckii, Reclus, Thes. Conch, fig. 13. 



23. Neritina piperina, Chemn. Thes. Conch, fig. 166, 167. 



24. Neritina dubia, Chemn. Thes. Conch, fig. 81-88. 



