PART II. SCOLYMIN-SJ. EBURNIN.E. 305 



CANCELLARIA Lam. Shell turbinate, scabrous,, generally 

 reticulated j body- whorl ventricose ; spire and aper- 

 ture nearly equal ; base obtuse ; pillar with distinct 

 basal plaits ; aperture rather effuse ; the canal almost 

 obsolete. 

 C. reticulata. En. Meth. 375. f. 3. lobata Sw. (fig. 72. /. ) 



RHINODOMUS Sw. No internal groove ; shell clavate j 

 the spire longer than, or equal with, the aperture ; the 

 whorls with ridges or longitudinal varices, and ren- 

 dered hispid by transverse grooves ; inner lip want- 

 ing ; pillar with a terminal fold ; aperture striated ; 

 outer lip with a basal sinus.* 



R. senticosus. Chem. tab. 193. f. 18641866. 



POLYTROPA Sw. I Bucciniform ; but the base narrowed, 

 and ending in a straight and contracted, but rather 

 short, channel j spire longer or as long as the aper- 

 ture ; exterior folliculated or tuberculated ; inner lip 

 flattened, as in Purpura; basal notch small, oblique ; 

 no internal channel. 



crispata. En. Meth. 41 9 f. 2. imbricata. Mart. 1 22. f. 1 124. 



Chem. 187. f. 1802. ? rugosa. Chem. f. 1473-4. 



lapilla. Pennant, pi. 72. f.89. 



SUB-FAM. 3. EBURNIN^:. 



Shell generally grooved round the suture ; body- whorl 

 ventricose ; spire rather longer than the aperture ; the 

 base obtuse, and almost entire ; inner lip much thick- 

 ened ; outer lip sinuated. 



CYLLENE Gray. Small ; shape of Harpa and Harpula ; 

 shell longitudinally ribbed,, and sub-coronated with 



* Analogous to Nassa; but the inner lip is not developed, and there is not 

 a superior or internal canal . it likewise represents Leiodomus by its animal, 

 Scalaria by its varices, and Terebra by it spire. There are several species 

 with shorter spires than senticosus. 



f This is an obvious representation of Purpura and Pyrula in this circle, 

 and is connected to Plicatella by such aberrant species as have two or three 

 obsolete tubercles at the base of the inner lip, and a row of others, more 

 distinct, on the opposite side ; but even in these the pillar is always de- 

 pressed, and the channel short. These species are chiefly from the Northern 

 and Southern Oceans. They are at once distinguished from the Purpurce 

 by having no internal channel at the top of the aperture. 

 X 



