PART II. PYRULIN^E. 



307 



SUB-FAM. 4. PYRULINJE. 



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. Shell thin, pyriform ; the 



base lengthened into an elongated 



channel; the upper part ventricose; 



spire very small, depressed ; inner lip 



wanting, (fig. 74.) 



ficus. En. Meth.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. 



CUMA Humphrey. Sub-fusiform ; spire and base 

 equal in length ; inner lip with a central fold. 

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



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

 or tuber cula ted, 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. 



tiippocastanea. En. M. 432. melongena. En. Meth. 435. 



f. 4. f. 3. 



lineata. Ib. 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. 



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