;n7 



This is the largest species as yet found, and very remarkable for 

 its waxen aspect. 



8. Petaloconchus octosectus, n. s. (fig. 8.) 



P. t. irregulariter spirali ; albida, seu Jlavido tincta ; rugutis 

 spiralibus et transversis vix sculpta ; basi haud planata, haud 

 nodosa ; taminis ut in P. cereo sitis, sed camern externa mi- 

 nore. 

 Diani. spiree "38, aperturse 'lo poli. 

 Hab. 1 S. Africa. Mus. Cuming. 



The section of this species (as of the lašt) resembles a figure 8. 

 It difFers from P. cerens in the absence of the remarkable structure 

 at the base, and in the comparatively small size of the outer chamber. 



9. Petaloconchus, sp. ind. 

 Hab. Tahiti. Mus. Cuming. 



This specimen is sufficiently perfect to prove its genus ; but not 

 to describe as a species. 



P. P. Carpenter. 

 July llth, 1856. 



Sections o/" Petaloconchi generally at greatest development. 



1. macrophragma. 2. cochlidium. Z.flavescms. 



I. cereus. 8. oclosectus. 



..I^^ *wr ^7 *^^'° from sketches drawn by the eve ouly under the raicro- 

 scope. \Vherelarge groups had to be held in strange positions, it was not found 

 practicahle to use the camera, nor did I feel at liberty to break specimens not my 

 o«n to obtain a favourable sechon. The figure of No. 5 contains the finest. of 

 »!;«>. ''°^'x^'^ |""^,"i-= ^""'^ occasionally approaches the other. The differ- 

 ence betweeu Ivo. 7 and No. 8 is lather exaggerated in the latter.— P. P C 



