1G7^ 



197. Cyclostoma lima (Tab. Suppl. xxxi. b, f. 324, 325), 

 Adaim. 



C. testa oblongo-pyramidali, decollata, fusca ; anfractibus 

 quatuor, teretibus, confertim decussato-striatis, asperrimis ; sutura 

 lata, profunda ; apertura circular! ; peritremate dilatato, late 

 expanse, lamellari, superne latiori ; umbilico majusculo, spiraliter 

 tricarinato ; operculo testaceo ; lamella externa spirali, reflexa, 

 striata. 



Shell oblong, pyramidal, decollated, brown ; volutions four, 

 rounded, very rough with close-set decussated strise ; suture 

 broad and deep ; aperture circular, peritreme dilated, broadly ex- 

 panded, lamellar, broader superiorly ; umbilicus rather large, with 

 three spiral keels ; operculum shelly, with an externally reflected 

 spiral lamella. 



Jamaica. 



198. Cyclostoivia bifasciatum (Tab. Suppl. xxxi. h, f. 322, 

 323), noUs. 



C. testa oblonga, acuminato-turrita, pallida ; anfractibus sep- 

 tem, rotundatis, Isevibus, ultimo fusco-bifasciato ; sutura distincta ; 

 apertura subcirculari, superne acuminata ; peritremate duplici, in- 

 crassato, externo incrassato, reflexo, interno tenui, angusto ; um- 

 bihco parvo. 



An oblong, acuminately turreted shell, of a pale colour, with 

 seven smooth, rounded volutions, the last of which has two brown 

 bands ; suture distinct ; aperture nearly circular, acuminated 

 superiorly ; peritreme thickened, double, the outer being thick- 

 ened and reflected, and the inner thin and narrow ; mnbilicus 

 small. 



Found near Guayaquil, by M. Delattre. 



