PAllT II. PYRULIN^. 307 



SUB-FAM. 4. PYRULIN^. 



Shell pyriform ; the base more or less produced ; the 



spire short and typically flattened ; inner lip convex, 



and perfectly smooth. * 



Rapella Sw. Shell ventricose, generally thin, almost 

 globose ; the base suddenly contracted, and forming 

 a short canal, the channel almost obsolete ; umbilicus 

 large, partly concealed by the inner lip. 



R. papyracia. En. Meth. 436. f. 1. 



FicuLA Sw. SheU thin, pyriform ; the 

 base lengthened into an elongated 

 channel ; the upper part ventricose ; 

 spire very small, depressed ; inner lip 

 wanting, (^fg. J 4).) 



ficus. En. M6th.431. caudata. En. Meth. 

 f. 1. 436.f.l.6,c. 



Pyrula Lam, Shell strong, pyriform, 



solid, coronated with spines or tubercles ; the base 

 lengthened into a long channel ; spire very short, 

 but a little elevated and pointed ; inner lip wanting. 

 P. perversa. En. Meth. 433. f. 4. 



Cum a Humphrey. Sub-fusiform ; spire and base 

 equal in length ; inner lip with a central fold. 

 C. sulcata Sw. (See Jig. 4. p. 87.) 



Mybistica Sw. Sub-pyriform ; spire strong, spiny, 

 or tuberculated, nearly as long as the base ; um- 

 bilicus either partially or entirely concealed ; inner 

 lip vitreous, thin ; the outer with an internal and 

 ascending canal ; the basal channel wide. 



hippocastanea. En. M. 432. melongena. En. Meth. 435. 



f. 4. f. 3. 



lineata. lb. f. 5. nodosa. Chem. 1564-5. 



means of Rapella. I know it, however, only from the figures above quoted. 

 Mr. Gray's description is confined to these words: " Shell deformed, white ; 

 from China." It, is obviously related to Rapella ; while, in its large umbili- 

 cus and nearly obsolete notch, it has a greater resemblance to Eburna than 

 to any other genus I am acquainted with. 

 * Except in Cuma, where there is a central fold. 



X 2 



