BULIMULUS-SONORINA. 157 



a". Thin ; internal lamina a tongue-like or triangular lobe ; 

 lip very broad, recurved. 



b. Length of aperture and diam. of shell decidedly 

 exceeding half the alt., stout ; alt. about 35 mill., 



veseyianus, p. 160. 



CL" Thin ; internal lamina sinuous, emarginate or squarish, 

 very high, lamellifer, p. 160. 



B. BIMATUS (Pfeiffer). PL 21, figs. 1, 2, 3, 4. 



"Shell deeply rimate, oblong-turrited, [with rather convex lateral 

 outlines], rather thin, subarcuately striatulate [and under the lens 

 faintly showing long granules produced by spiral decussating stria?, 

 usually visible only in places, and often almost obsolete, fig. 3], 

 pale corneous [or light fleshy-brown, with an indistinct pale sub- 

 sutural line, somewhat glossy] ; spire turrited, rather obtuse [with 

 nearly two costulate nepionic whorls] ; whorls 7 [to 7i], nearly flat, 

 the last three-eighths the length of the shell, rotund at base. 



"Columella with one fold within, [passing into a moderately 

 high, strong, callous lamina spirally encircling the pillar within the 

 last whorl, seen upon breaking the shell, fig. 1]. Aperture oblong- 

 oval ; peristome simple, the margins approximating, joined by a 

 callus ; right margin slightly expanded, [arching far across the 

 whorl above] ; columellar margin dilated, spreading." 



"Alt. 33, diam. [above aperture, as usual with Pfr.] 11 mill.; 

 aperture 13 mill, long, including peristome 4* [error for 9, evidently 

 from misreading the scale] wide." (Pfr.). 



Alt. 33, diam. 13; alt. of aperture 12'7, width 8'8 mill, (speci- 

 men). 



Near Sail Jose del Cabo, 12 miles east of the Cape (Bryant), to 

 La Paz, Lower California. 



Bulimus rimatus PFR., P. Z. 8., 1846, p. 112; Monographia, ii, 

 p. 104. REEVE, Conch. Icon., pi. 54, f. 359. Conf. ANCEY, Bull. 

 Soc. Mai. France, iii, 1886, p. 20. Bulimina (Petrceus) rimata PFR. 

 -CLESSIN, Nomencl. Hel. Viv., p. 286. 



Bulimulus (Mes&mbrinus) inscendens subsp. bryanti COOPER, 

 Proc. Cal. Acad. Sci. (2), iii, pp. 101,340, pi. 13, f. 4a-c, 1893; 

 Zoe, iii, p. 15 ; Conf. also, Proc. Cal. Acad. (2), iv, pp. 135-138.- 

 Bulimulus (Leptobyrsus) bryanti (Cooper) DALL, Proc. U. S. Nat. 

 Mus., xvi, 1893, p. 645, pi. 71, f. 3, 4. 



Pfeitfer's original description of this species is given, with the in- 

 terpolation of such details as additional specimens suggest. The 



