344 SHELLS AND SHELL-FISH. PART II. 



aperture ; outer lip thin, but thickened on the in- 

 ternal margin ; one or both lips with distinct teeth 

 or plaits ; animal with two tentacula, sessile eyes, 

 but no operculum. 



Geovula Sw. Oval ; spire very short, tur- 

 binated^ cancellated, of many whorls ; 

 apex obtuse ; outer lip thickened inter- 

 nally; inner lip with a strong plait near 

 the base. (fig. 105.) 



G. Midse. GrifF. Cuv. 27. f. 8. 



Pedipes Adans. Shell small, turbinate or 

 sub-spiral ; body-whorl ventricose ; aper- 

 ture on both sides defended by several teeth and plaits. 

 P. afira. Lowe, in Zool. Journ. v. pi. 12, f. 8 — 12. 



Scarabus Montf. Shell depressed ; spire as long as the 



aperture ; umbilicus partly open ; both lips with 



plaits, and tuberculous teeth. 



S. imbrium. Sow. Man. f. 299. 

 Melampus Montf. Oval, sub-coniform ; spire very 



short, obtuse ; aperture narrow ; inner lip thin, and 



striated internally ; pillar plaited, 



fasciatus. Gr. Cuv. 27. f. 13. exiguus Zezi>. Z. J. v. 12. f. 6,7. 



Rhodostoma Sw. General form of Melampus and 

 Tornatella ; but the aperture is not striated, and the 

 inner margin of the lip is broad, considerably thick- 

 ened, and distinctly notched towards the top. 



coffea. Chem. 120. f. 1043. nucleus. Fer. Tab. Sys. 105. 



fabula, Fer. Tab. S> s. 1 05. 24. 26. 



ScissuRELLA D'Ovhig. Shell very small or minute; he- 

 liciform ; spire depressed ; aperture effuse ; outer lip 

 with a narrow fissure or slit ; umbilicus open. 

 S. elatior. Sow. Man. f. 340. 



Family NATICID^. 



Shell globose, generally smooth ; spire minute, scarcely 

 raised ; aperture large, semicircular. 



