BULIMULUS. 



207 



Bulimus pilula, W. G. Binxey, Proc. Acad. Nat. Sci. Phila. 1861, 331 (fig.). 

 3Jormus jnlula, Tryon, Am. Jouru. Conch. Ill, 173, pi. xiv, f. 7 (18(J7). 



Lower California, at Todos Santos Mission and Marguerita 

 Island. (Xanlus.) 



Mr. Xantus found many of this species during his stay on the 

 peninsula, and is decidedly of the opinion that maturer specimens, 

 if any existed, would have been noticed by him. It frequents 

 rocky spots, living under mosses. 



I can find no figure in Reeves' Monograph or description in 

 Pfeiffer's works of any species at all approaching it in shape. 

 The measurements arc taken from the largest individual. All 

 the specimens are uniform in outline and other respects. 



Subgenus SCUTALUS, Albers. 



Shell perforate or umbilicate, ovate-conic, regularly striate, 

 rough, brownish-white, usually variegated ; whirls 4-7, the last 

 ventrieose, more or less accurately equalling the spire, com- 

 pressed at the base ; aperture oblong-ovate, peristome more or 

 less expanded, often reflexed, lightly thickened within. 



Bulisuiilus proteus, Broderip.— Shell Fig. 358. 



umbilicated, ovate-conic, thin, crowdedly granu- 

 lated and striate, dull white, varied with smoke 

 color; whirls six, rather convex, the last equalling 

 the spire ; umbilicus rather large, pervious ; aper- 

 ture suboval ; peristome thin, acute, broadly ex- 

 panded, its ends converging, the columellar por- 

 tion very broad, flat, effuse. Length 40, diam. 

 19 ; of aperture 19 long, 10 mill, wide, within. 

 Bulimus proteus, Broderip, Proc. Zool. Soc. 

 London, 1832, 107. — Pfeiffer, Mon. Hel. 

 Viv. II, 61 (which see for further syno- 

 nyms). — W. G. Binney, Proc. Acad. Nat. 

 Sci. Philad. 1801,331. 

 Bulimus soi-clldus, Lamarck,' not Lesson, teste 



Pfr. 

 Scutalus proteus, Tryon, Am. Journ. Conch. Ill, 173, pi. xiv, f. 8 (1867). 



Buliinidtis proteus. 



' B. proteus, Guild. = B. elongatus. 



