22 STROPHOCHEILUS-BORUS. 



The zigzag markings of light yellow cuticle or denuded, are char- 

 acteristic. This species, like B. popelairianus, is depressed on the 

 back. It differs conspicuously from that species in the weak sculpture 

 of the earlier whorls. The last whorl when examined with a strong 

 lens, shows an excessively fine, dense longitudinal striolation, some- 

 what less distinct than in B. proximus, but of the same character. 

 This is an excellent distinctive character of these species, which does 

 not occur in the popelairianus-granulosus series, nor indeed in any 

 other group of Borus. 



S. CANTAGALLANUS Rang. PI. 16, fig. 24 ; pi. 17, figs. 28, 29. 



Shell large, ovate-conic, olivaceous-brown with some dark streaks 

 on body whorl, becoming dark purple on the spire ; the suture 

 bordered by a wide light band. Nepionic whorls with weak, spaced 

 radial riblets; penult, and next earlier whorls with spiral series of 

 minute granules ; last whorl showing coarse low, inconspicuous spiral 

 cords especially above, and under a very strong lens seen to have an 

 excessively dense, fine sculpture of wavy longitudinal anastomosing 

 raised lines. Aperture over half the shell's length, pear-shaped,, 

 purplish-tinted inside; outer lip well curved, narrowly refiexed, 

 thickened, white. Columella white, dilated above; parietal callus 

 strong, white, generally with a callus nodule above. 



Alt. 98, diam. 61 mill. 



Alt. 89, diam. 55 mill. 



Southern Brazil; neighborhood of Cantagallo, Prov. Rio Janeiro 

 (Rang), and forest region generally from Rio to Bahia. 



Helix cantagallana RANG, Ann. Sci. Nat. xxiv, p. 50 (1831). 

 Bulimus cantagallanus BECK, Index, p. 53. FISCHER, Exped. Sci. 

 du Mexique, Etudes sur lesMoll. Terr, et Fluv., i, p. 469, pi. 22, f 

 12-17, anatomy. DESII. & DE FOLIN, Actes de la Soc. Linn. Bord. 

 xxv, p. 483, plate (living animal). MARTENS, Novit. Conch, v, p. 

 12, pi. 138, f. 1, 2. B. accelerans MARTENS, Malak. Bl. xiv, 1867, 

 p. 137. PFR., Monogr. vi, p. 10. Bulinus proximus SOWB., Conch. 

 Illustr. f. 102 (1833). Bulimus proximus PFR., Monogr. ii,p. 20. 

 REEVE, C. Icon. f. 607. MARTENS, Novit. Conch, v, p. 11. Bui. 

 terrestris $Pix=B. corrugatus WAGN., Test. Bras., p. 5, pi. 6. f. l r 

 (Young). Co??/. DOHRN, Jahrb. M. G. x, p. 347. 



The sutural light band is conspicuous. The apical folds are as 

 in B. valenciennesii, but it lacks the zigzag markings of that species. 

 The micro-sculpture of the last whorl is peculiar and very charac- 



