48 STROniOCHEILUS-THAUMASTUS. 



the middle, invisible when the cuticle is intact, longer than the 

 spire; suture whitish margined, crenate. Aperture oval, whitish, 

 shining inside; columella white, somewhat twisted; outer lip thick- 

 ened, subreflexed, black-edged ; parietal callus black. Alt. 100, 

 diam. 50 ; aperture, alt. 55, width 30 mill. (Jouss.). 



New Granada. 



Tatutor tatutor Jouss., Le Naturalists, IX, p. 6, f. 1 (March, 



1887). 



Larger than S. melanocheilus, with larger, more spreading aper- 

 ture, stronger striation, thicker epidermis and lacking the brown 

 band between two light ones of that species. It is probably most 

 nearly allied to /S'. taunaisii, but seems proportionally wider. M. 

 Jousseaume displays his accustomed ingenuity in the generic and 

 specific combination he has chosen. 



S. TAUNAISII Ferussac. PI. 25, figs. 78, 79. 



Shell imperforate, lengthened-ovate, solid. Yellowish-chestnut, 

 with few or many Irregularly placed dark chestnut oblique streaks; 

 the spire dull reddish-brown; sutures more or less distinctly light- 

 margined throughout. Surface with irregular wrinkles of growth 

 and numerous unequally but wide spaced spiral incised lines, cutting 

 the growth-wrinkles, and often becoming more or less obsolete on the 

 body-whorl, absent below ; spire indistinctly decussated ; nepionic 

 whorls sculptured with fine, close and regular slightly waved rib- 

 strife, but usually in large part eroded or worn in adults. Spire 

 conic, the apex obtuse, generally truncated and plugged. Whorls 

 almost 7, nearly flat, the suture linear, but around last whorl it be- 

 comes more impressed, and has a distinct crenulated margin defined 

 by a groove. 



Aperture less than half the shell's length, small, narrowly ovate, 

 ivhite inside; peristome white, thickened within, blunt, not expanded ; 

 columella white, with a twisted, convex entering fold, broadly reflexed 

 in a cloxely appressed callus over the umbilical region ; parietal callus 

 white or transparent. 



Alt. 84, diam. 36, alt. of aperture 37 mill. 



Brazil; C'orcobado, Rio Janeiro and Macahc. (Paz and Martinez) ; 

 Tijuca (A. D. Brown). 



Helix (Cochlostyla) taunaisii FER., Prodrom. p. 48 ; Hist.pl. 113, 

 f. 4-6. RANG, Ann. Sc. Nat. xxiv, p. 18. Jltilimus taunaisii GR\\, 

 Ann. of Philos. (n. ser.) ix, p. 414. BECK, Index, p. 52. DESH. in 



