STROPHOCIIEILUS. 7 



gitndiiKtlund more spaced transverse wrinkles, spire (nepionic whorls) 

 closely and regularly rib-striate, first whorl planorboid, smooth. 

 Whorls 5, convex, the last obliquely descending. 



Aperture decidedly over half the shell's length, lilac within ; per- 

 istome very broadly expanded reflexed and recurved, white or lilac- 

 tinted ; its face rounded. Columella widened above, the inner edge 

 faintly convex; parietal callus whitish, more or less translucent, 



Alt. 60, diam. 31 ; aperture, alt. 36 mill. 



Alt. 53, diam. 30 ; aperture, alt. 33 mill. 



Alt. 48i, diam. 23; aperture, alt. 26 mill. 



Province of Bahia, Brazil. 



Helix pudica MULL., Verm. Terrest. et Fluv., ii, p. 97. GMELIN, 

 Syst. Nat. (13), p. 3645. Bnlimus pudicus BECK, Index, p. 53. 

 PFR., Conchyl. Cab. pi. 22, f. 3 ; Monogr. ii, p. 53 ; Malak. Bl. 1857, 

 p. 179. REEVE, Conch. Icon. pi. 31, f. 191. DESK, in Fer. Hist. p. 

 30, pi. 143, f. 11-13. Partula pudica Fer., Prodr. p. 66. POT. & 

 MICH., Galerie, i, p. 198, pi. 20, f. 7, 8.? Helix erubescens SOL- 

 ANDER, Portland Catal. Auris vinjinea, etc., CHEMJN. Conchyl. Cab. 

 ix, pt. 2, p. 44, pi. 121, f. 1042 (same specimen described by Mu'ller). 

 Bulimus virgineus BRUG., Encycl. Meth. p. 315. Voluta auris 

 virginis DILLWYN, Descr. Catal. i, p. 502. Partula australis Bow- 

 DICH, Elem. Conch, pi. 8, f. 30. Strophocheilus almeida SPIX, Test. 

 Bras. pi. 11, f. 2, 3. Bidimm almeida PFR., Monogr. iv, p. 377. 

 Bulhuts myersii SOWB., Conch. Illustr. f. 98. Balinus perplexus 

 SOWB., Conch. Illustr., index, no. 98. 



This species approaches Plekocheilus in sculpture, differing from 

 8. planidens and milleri in lacking spiral striation. The large nepio- 

 nic shell, however, shows that the species is most nearly allied to 

 the forms here following. The lip varies from white to rose in 

 color. 



S. PLANIDENS Michelin. PI. 22, fig. 50. 



Shell perforate or closed, ovate-oblong, rather solid, shining, green- 

 ish- or brownish-yellow, slightly transparent, the spire pink. Sur- 

 face smooth except for growth-lines and densely crowded microscopic 

 incised strice, somewhat waved ; the whorls of spire obliquely, densely 

 striate. Whorls 5, the first planorboid, forming an obtuse apex ; 

 the last whorl obliquely descending, suture falling more rapidly to- 

 ward the aperture. 



