26 BULIMULUS-SCUTALUS. 



agrees with PfeifFer in considering B.jussieui a variety of culmineus, 

 and further comments substantially as follows : that this species is 

 extremely variable is not astonishing, when we consider that it 

 ranges over a considerable extent of country, from the temperate 

 regions to an elevation of 5,000 meters, where reigns almost perpet- 

 ual frost. Various modifications ensue, which, while not altering 

 the essential characters of the species, yet would lead to erroneous 

 conclusions if only the extreme forms of the series are compared. 

 The size notably varies, as well as the length of the spire and the 

 comparative diameter of .the last whorl. It is the same with the 

 coloration, which, from a gray-white passes gradually to pale yellow,, 

 thence to a pure ochre yellow ; and, in turn, this color gives place 

 to a dark brown, through intermediate shades of reddish-fawn. 

 All these modifications are connected by insensible transition stages, 

 no sharp limits being assignable. 



According to M. d'Orbigny, B. culmineus is one of the species 

 which live at the greatest heights, peopling the Andean plateau 

 proper, descending from Desaguadero to Andahuaylas, into a tem- 

 perate region where the vine flourishes. The grayish or uncolored 

 examples are from the high country toward and in Bolivia ; the 

 yellow form was collected at Huancabelica, at an elevation of 2,000 

 to 2,200 meters 500 meters higher than the peak of Teneriffe. 



B. SUBJUSSIEUI Pilsbry, n. n. PL 5, figs. 59, 60. 



Shell ovate-conic, irregularly decussate-granular by rude striae 

 cut by fine spirals, subconic ; ornamented with spiral brown bands, 

 sometimes streaked ; spire conic, subinflated ; whorls 6, rather con- 

 vex, the last as long as the spire. Aperture ovate, the peristome 

 simple, acute ; columella arcuate, dilated above and reflexed over 

 the small, pervious, elongated umbilicus. Alt. 30, diam. 15 mill. 



Province of Cuzco, Peru. 



Bulimus jussieui (Valenciennes in Coll. Mus. Paris) HUPE, in 

 Castelnau, Exped., p. 48, pi. 7, f. 4, 4a (1857). B.jussieui Hupe, 

 PFR., Malak. Bl., vi, 1859, p. 47 ; Monogr., vi, 127. Not B.jussi- 

 eui Pfr., 1846=5. culmineus. Conf. also PFR., Malak. BL, 1858, p. 

 165. 



More ventricose than B. culmineus, with shorter spire, and 

 banded like some specimens of B. revinctus, which, however, is a 

 still shorter shell. Further investigation is needed to show the re- 

 lation of this form to B. culmineua. It seems specifically distinct,. 



