168 NEOPETR^US. 



imus cora Orb., PFR., Monogr., iii, p. 339 (1853). Bulimus tessel- 

 latus Shuttl., PFR., Monogr., iv, p. 402 (1859); vi, p. 49; Novit- 

 Conch., iii, p. 412, pi. 94, f. 14-16. HIDALGO, Journal de Conchyl. 

 1870, p. 61 ; Viaje al Pacifico, p. 123 (including B. atahualpa*). 



A shorter, more compact species than N. cora. Hidalgo believes 

 B. atahualpa to be a form of tessellatus, and in view of the consider- 

 able variation observed in other species of Neopetrceus this may 

 readily be credited. 



Var. ATAHUALPA (Dohrn). PI. 31, figs. 14, 15, 16, 17, 20. 



Shell with compressed umbilicus passing into a long curved rirna- 

 tion, stoutly ovate-conic, solid ; whitish, slightly brown or flesh 

 tinted, unicolored or with five chestnut bands subcontinuous or more 

 or less interrupted into oblong spots, sometimes obliquely streaked 

 (fig. 17); rather shining, sraoothish, becoming obliquely wrinkle- 

 striate on the spire. Whorls nearly 7, the apical If or 2 purple- 

 brown below, white above, with slender vertical riblets and densely 

 cross striate intervals (fig. 20), the following 2 or more whorls 

 rather flattened, showing a keel at the suture, last whorl inflated, 

 large, short, well rounded below, strongly, arcuately ascending in 

 front. 



Aperture about half the total alt., ovate-truncate, brown within 

 and showing the bands ; peristome acute, more or less thickened 

 inside, usually white with purplish spots, the outer lip a little ex- 

 panded throughout or scarcely so, columellar lip broadly dilated, 

 forming an extremely wide columellar area ; columella concave or 

 straightened, generally showing a weak fold far within. Parietal 

 callus slight, not obscuring the bands. 



Alt. 38, diam. 27, alt. of aperture 22 mill. (figs. 18, 19). 



Alt. 33, diam. 23, alt. of aperture 18 mill, (specimen). 



Alt. 32*5, diam. 21, alt. of aperture 17'5 mill. (fig. 17). 



Alt. 43, diam. 21, alt. of aperture 20, width 15 mill. (Dohrn). 



Alt. 39, diam. 23, alt. of aperture 22, width 17 mill. (Dohrn). 



Alt. 37, diam. 22, alt. of aperture 20, width 16 mill. (Dohrn). 



Alt. 36, diam. 20, alt. of aperture 19, width 15 mill. (Dohrn). 



Peru (Dohrn) ; Patas (Acad. coll.). 



Bulimulus atahualpa DOHRN, Malak. Bl., x, 1863, p. 153. Bul- 

 imus atahualpa PFR., Monogr., vi, p. 49 ; Novit. Couch., iii, p. 411 

 pi. 94, f. 11-13. Conf. HIDALGO, Viaje al Pacif, p. 124, and 

 DOHRN, Jahrb. D. M. Gesell., ix, 1882, p. 107. 



