PTEROCYCLOS— Plate II. 



Species 10. Fig. a, b, (Mus. Cuniiug-.) 



Ptekocyci.os AXGULiFEKUS. Pter. testa latissiiiie per- 

 npcrte umUlicatd, angude diacoided, fuho-castaueo 

 imdatd el tbictd, anfractibus nd snturas impressis, 

 deinde rolnndatis, undique dense I'ude striatis ; aper- 

 tiird olAiqiie circulari, labro calloso-dvpUciito, rejle.vo. 

 x'mu coiitwue angnlato-producto . 



The angular Pterociclos. Sliell ven broadly, very 

 (ipenlv uinbilicateil, narrowly discoid, waved and 

 stained with fulvous brown, whorls impressed at the 



sutures, then rounded, closely rudely striated tlirougli- 

 out, aperture obliquely circular, lip callously dupli- 

 cate, reilected, sinus continuously nngulnrlv pro- 

 duced. 



Cyclostoma angulifenaii, Souleyet, Voy. de la Bonite, 

 Moll.pl. 30. f. 6-11. 

 Pteroc;jclos angidiferuH, Pfeiffcr. 



Hah. Cochiii-China. 



A narrowly discoid species, with the sinus very con- 

 spicuously angularly produced upon the body whorl. 



