HELIX.— Plate CII. 



bose, obliquely whukled, granulated, encircled with 

 three brown bands, covered with a brown-streaked 

 epidermis ; whorls four, rather convex, the last ven- 

 tricose ; aperture large, lunar-rounded, shining wliite 

 and marked with the three bands within ; lip simple, 

 margins approximating, coliinicllar margin broadly 

 expanded, open, basal a little reflected. 



Valenciennes, Pfeiffer, Symbola;, vol. i. p. 37. 



Uab. Interior of Mexico. 



It is extremely doubtful whether this is really distinct 

 from the preceding species. It may prove to be merely 

 a different state of it. 



Species 567. (Mus. Cuming.) 



Heli.x SEMIDECI'SSATA. Hel. testa vix umMlicutu, tenui, 

 subtrochiformi, lumidiuscula, iinditjue suitiliter gra- 



nalo-decuitatd, fulvo-brumivd, ban Uniore ; anfracti- 

 bus »ex, platw-conrcxl), ad sulurax tenuicarinatU, ul- 

 timo ad perip/ieriam carinato ; ajurrturd lunari ,- peri- 

 utomale simplici, paululum incriumlo. 



The semu)Ecussated Helix. Shell scarcely luubili- 

 cated, thin, somewliat Troehus-shaped, rather swollen, 

 finely graimlarly decussated throughout, fulvous- 

 brown, smootlicr at the base ; whorls six, flatly con- 

 vex, finely keeled at the sutures, last whorl keeled 

 at the periphery ; aperture lunar ; lip simple, slightly 

 thickened. 



Pfeiffer, Pro. Zool. Soc. 1850. 



Hub. Mauritius. 



A delicate bright fulvous-browu shell, with the surface 

 granulai'ly decussated, the granules at the base being 

 almost obsolete. 



