BULIMULUS. 



193 



in tlie third volume of Pfciifer's Monograph. An imperfect, 

 smaller specimen is described as nilelinus. I do not agree with 

 Dr. Gould in also placing B. lilacinus, Rve., in the synonymy. 



The specimen figured above is from Dr. Binney's collection. 

 Fig. 335 is copied from a drawing by Mrs. Say under which is 

 written, in Mr. Say's handwriting, " Bulimus serperadrus, 

 Mexico, Mr. McClurr.'" 



In the collection of Mr. Bland is an uniformly white specimen. 



Subgenus LIOSTRACUS, Albers. 

 Shell thin, perforate, oblong-conic, glabrous, most often shin- 

 ing, banded ; whirls Y-8, aperture obliquely semioval, much 

 smaller than one-half the shell's length ; peristome thin, more or 

 less expanded, white, its columellar margin dilated-reflexed. 



Blllinilllus ziegleri, Pfeiffer. — Shell subperforate, ovate-conic, 

 tliiu, decussated with crowded striae aud microscopic revolving nearly 

 obsolete lines, white, sometimes varied with interrupted bands 

 or blotches of chestnut; spire conical, rather acute; whirls 

 six, scarcely convex, the last subangulated at its middle, a 

 little shorter than the spire ; columella slightly receding ; 

 aperture oval ; peristome simple, its columellar portion 

 slightly reflected, subappressed. Length 21, diam. 10 ; of the 

 aperture 10 long, G mill, broad. 



Bulimus ziegleri, Pfeiffer, Proc. Zool. Soc. 1845, 113 ; Mon. Hel. 

 Viv. II, 175 ; III, 413 ; IV, 172.— Reeve, Con. Icon. 389. 



Orthaltcus ziegleri, Carpenter, Maz. Cat. 177. 



Liostracus ziegleri, Tryon, Am. Journ. Conch. Ill, 168, pi. xiii, f. 6 (1867). 



Mazatlan and Central America. It has not yet been found in 

 eastern North America, and belongs more properly to the 

 Mexican than North American fauna. 



Fig. 336 is drawn from a specimen received from Dr. Pffeiffer. 



Yis. 336. 



Bulinaulus mai'ieQinils, Poey. — Shell imperforate, 

 ovate-conic, thin, very minutely substriate, somewhat shining, 

 pellucid, white, varied above the middle by numerous sub- 

 interrupted, reddish-chestnut bands ; spire conic, somewhat 

 acute ; whirls five, scarcely convex, the last about equalling 

 the spire, subatteuuated at base ; aperture scarcely oblique, 

 subelliptical, narrowed at base ; peristome simple, straight, its 

 columellar termination subreflected above, appressed. Length 

 16, diam. 8 mill. ; of aperture, length 9, breadth in its centre 5. 

 13 December, 1888. 



Fig. 337. 



