W^ JV tf 



PERRONA; 



by revolving lines ; nodulous at the periphery, and less distin< 

 so infer iorly. Length, 27 mill. 



Japan. 



I include this species in Clavatula on account of the opercu- 

 lum, which has a subcentral nucleus, rather near the inner 

 margin. 



C. TEXTILIS, Hinds. Straits of Macassar. 



Shortly diagnosed in Zool. Proc., 1843, but not included with 

 the other species in the Moll, of Yoy. Sulphur, nor figured in 

 Reeve's Iconica. The species must, therefore, have been either 

 mislaid or discovered to have no claim to recognition. Clava- 

 tula, according to Hinds, contained numerous species now 

 excluded from that group. 



Subgenus PERRONA, Schum., 1817. 



Dr. Fischer has separated Tomella, Swainson, as a subgenus, 

 characterized by spire not carinated, sinus wide near the middle 

 of the outer lip; type, C.lineata. The position of the sinus in 

 that species depends upon the extent of the callosity upon the 

 upper part of the inner lip, and the spire is so variable, some 

 specimens of undoubted lineata being subcarinate, that I do not 

 think the distinction can be maintained. 



C. LINEATA, Lam. PI. 8, figs. 10, 11. 



Shell smooth, body-whorl more or less constricted above, the 

 spire sometimes very short, and sometimes long ; whitish or 

 yellowish brown, thickly flexuously longitudinally lineated with 

 chestnut or chocolate. Length, 1-1'5 inches. 



W. Africa ; Cape of Good Hope. 



C. TAXUS, Chemn. PI. 8, fig. 14; PI. 32, fig. 15. 



Shell yellowish brown, nexuously lineated with chestnut, under 

 a thick olivaceous brown epidermis ; whorls constricted above, 

 slightly nodulously longitudinally plicate below, and flexuously 

 longitudinally striate ; aperture brownish. 



Length, 2'75-4 inches. 



Cape of Good Hope. 

 C. OBESA, Reeve. PI. 8, figs. 9, 4. 



Whorls corded below the suture, with a constriction below the 

 16 



