306 



SHELLS AND SHELL-FISH. PART II. 



tubercles, sometimes cancellated; aperture striated 

 within, rather effuse, longer than the spire, which is 

 acute ; inner lip large, vitreous, spreading ; the base 

 finely striated ; outer lip with a slight sinus at the 

 base, as in Rhinodomus ; no internal groove ; the 

 suture sometimes channeled and polished. 

 C. Owenii. Griff. Cuv. p. 41. f. 2. 



Struthiolaria Lam. Spire turreted ; outer lip con- 

 siderably sinuated ; inner lip thick, spreading ; the 

 piUar turned inwards ; the basal notch nearly obso- 

 lete, 

 nodulosa. En. M. 431. f. 1. crenulata. Astrol. pi. 31.f. 8, 9. 



Eburna Lam. Smooth ; sutures gene- 

 rally grooved ; spire and aperture about 

 equal ; inner lip very thick, partly con- 

 cealing the umbilicus, and with an up- 

 per internal groove ; outer lip thin, 

 slightly sinuated ; basal notch oblique, 

 smaU. {fig. 13.) 



E.spirata. En.Meth.401.f.2. pacifica. En. Mdth. 401. f.4. 

 PsEUDOLivA Sw. Shell thick, oval, oliviform, ventricose; 

 spire very short, acute ; base with two parallel 

 grooves, one of which forms a notch at the base of 

 the outer lip ; suture slightly channeled ; inner lip 

 very thick, and turning inwards ; aperture with an 

 internal canal. Connects the Turbinelltd^ with 

 the VoLUTiD^. 

 P. pkimbea. Chem. 188. f. 1806, 1807. {fig. 3. p. 82.) 



Latiaxis Sw. Shell sub-pyriform, turbinate, and 

 the whorls detached, as if distorted ; but the spire 

 flattened at the summit ; whorls angulated, and cari- 

 nated, with a fimbriated undulate ridge ; pillar none ; 

 umbilicus excessively large and deep ; aperture an- 

 gular ; the basal notch nearly obsolete.* 

 P. Mawaj. Griff. Cuv. pi. 25. f. 4. 



* This singular shell I regard as the representation of Scalaria, Verme- 

 tus, &c. in the present group, and as opening a passage to the FyrulincE by 



