ORTHALICUS. 197 



upper fifth of the last whorl, or fade to a much fainter tint there, 

 leaving a broad, pale zone below the sutures ; the stripes becoming 

 rich chestnut on the spire, the base with a small pale area below; en- 

 circled by a narrow, frequently interrupted, peripheral, blackish- chestnut 

 band, and a similar but less interrupted one at the base. Surface 

 rather smooth to the eye, but under a lens showing irregular growth- 

 wrinkles, and close, irregular spiral stria:. Whorls G^, moderately 

 convex, the first three forming a netted-striolate or punctate nepionic 

 shell, somewhat more attenuated than the subsequent outlines ; apex 

 obtuse; last whorl convex. Aperture pure white throughout; per- 

 istome thick, reflexed ; columella with a strong, short fold above; 

 parietal callus heavy, pure white. 



Alt. 2f, diam. 1^ inch. (Reeve's type). 



Alt. 61, diam. 33, longest axis of aperture 32J mill. (fig. 31). 



Alt. 75, diam. 34 mill. (Hidalgo, for gloriosus). 



Alt. 78, diam. 34, aperture 38 mill. (Pfr. for gloriosus}. 



Bulimus deburghite REEVE, P. Z. S. 1859, p. 123 PFR., Monogr. 



vi, p. 15 Porphyrobaphe deburghioi MILLER, Malak. Blatt. (n. F.) 

 i, p. 119. DOHRN, Jahrb. d. D. Malak. Ges. ix, 1882, p. 112. 

 COUSIN, Bull. Soc. Zool. France xii, p. 200. Bulimus gloriosus 

 PFR., P. Z. S. 1861, p. 387, pi. 37. f. 4; Monogr. vi, p. 14 HID- 

 ALGO, Mol. Viaje al Pacifico, p. 62, pi. 4, f. 2, 3 Porphyrobaphe 

 gloriosus MILLER, Malak. Blatt. xxv, 1878, p. 185 ; and (n. F.), i, 

 p. 200, pi. 5, f. 1 (var. elongata). Conf. DOHRN, 1. c. Orthalicus 

 (Porphyrobaphe) gloriosus MARTENS, Conchol. Mittheil. p. 159. 

 REIBISCH, Sitzungsber. u. Abhandl. Nat. Ges. Isis, 1896, p. 57 

 \bis~\ (\^l).Bidimus duburghii Reeve, HIGGINS, P. Z. S. 1872, 

 p. 687. 



Peru: banks of Amazon rtuer (Reeve). Ecuador: San Jose 

 (Isern and Espada); Nanegal (Wolf); road to Canelos (Stiibel); Rio- 

 bamba (Cisneros) ; Machai, valfe del Pastaza, 4900 ft. above the sea 

 (Wolf). 



The broad pale zone below the suture, bold marking of the median 

 portion of the body-whorl, and two narrow, interrupted girdles, with 

 the fine spiral striation of the surface and pure white aperture, lips and 

 parietal wall, easily separate this from the other species. Pfeiflfer's B. 

 gloriosus (fi<r. 9) has no varietal characters. The species is a variable 

 one in size and contour, as well as in the prominence of the columellar 

 fold. The number of whorls varies from 6^ in small shells, to 7 or 7-J 



