HTROPHOCHEILUS-THAUMASTUS. 47 



dull reddish-brown above. Surface shining, smooth on the body- 

 whorl except for slight growth-wrinkles and some traces of oblique 

 short sulci, often imperceptible ; the spire very indistinctly decus- 

 sated ; nepiouic shell granulated by the breaking up of vermiculate 

 fine rib-strise, sometimes appearing somewhat thimble-pitted. Spire 

 convex-conic, the apex obtuse, entire or nearly so. Whorls nearly 

 7, slightly convex, the last obliquely descending a little. 



Aperture narrow, ovate-acuminate, dark, with a pearly luster 

 within ; peristome white, thin, obtuse, not expanded nor perceptibly 

 thickened within. Columella white, having an oblique, twisted 

 enteriilg fold above. Parietal callus pearly-translucent. 



Alt. 78, diam. 34 ; alt. of aperture 35 mill. Sometimes stouter. 



Brazil; Peru (?) 



Bulimus magnificus GRAT., Actes Soc. Linn. Bordeaux, xi, 1839, 

 p. 165, 419, pi. 4, f. 1. DESK, in Fer., Hist, ii, p. 31, pi. 142A, f. 

 15, 16. PFR., Mouogr. ii, p. 165 ; Conchyl. Cab. p. 219, pi. 61, f. 

 1, 2. Bulimus taunaysii REEVE, Conch. Icon. pi. 33, f. 202. 



Typical examples are darker and more glossy than S. taunaisii, 

 smoother, often with no sutural margination, whatever; the lip 

 thinner, and interior of the aperture very dark. There are, how- 

 ever, some more or less intermediate forms. It is likely that the 

 undescribed Bulimus monozonalis Desh. is a small specimen or 

 variety of this species. 



A stouter form occurs, lighter in color and with proportionately 

 larger aperture. Alt. 62*, diam. 32 ; alt. of aperture 30 mill. This 

 is near taunaisii in color, but still the suture is not margined and the 

 sculpture of nepionic shell and body-whorl is as described above for 

 mar/nificus. 



Yar. MONOZONALIS Deshayes. PI. 25, figs. 76, 77. 



This form was figured on pi. 144, figs. 2, 3 of Ferussac's Histoire, 

 and given the above name in the explanation of plates of that work, 

 by Deshayes. It may not improbably be the undescribed Helix 

 pullata of the Prodromus, p. 48. The figures represent a shell much 

 like typical S. magnificus in color, etc., but smaller. 



Alt. 5H, diam. 24 mill. 



S. TATUTOR Jousseaume. PI. 30, fig. 24. 



Shell subperforate, ovate-oblong, striated, brownish-tawny ; whorls 

 6 or 7, slightly convex, the last with an ill-defined whitish band in 



