CERION, GROUP VI. 219 



Mr. Maynard's remarks upon the teeth of Cerion, under his de- 

 scription of S. polita, give evidence of the workings of a philosophic 

 mind upon an insufficient basis of fact. 



C. VULNERA.TUM (Kuster). PI. 29, figs. 57, 58, 59, 60, 61. 



Shell rimate, long and cylindric, not very thick; white, closely 

 zigzag-striped and marbled with brown and purplish-brown, usually 

 the dark, sometimes the light predominating. Whorls usually 10-11, 

 the last 3 or 4 forming the cylindrical portion, smooth; those above 

 forming a cone with convex sides and obtuse apex, densely and min- 

 utely rib-striate ; the last whorl ascending in front, smooth or striate 

 at base. Aperture truncate-ovate, brown inside ; parietal lamella 

 long, but low and narrow ; axial lamella rather inconspicuous. Per- 

 istome white, narrow, expanded or subreflexed ; parietal callus 

 usually thin. 



Length 30J, diam. 10 mill, (elongate specimen). 



Length 25, diam. 8 mill, (average specimen). 



Length 23^, diam. 9^ mill, (short specimen). 



Cuba : Gibara, on the N. shore of Santiago de Cuba. 



Pupa vulnerata Kiister, Conchyl. Cab., p. 161, pi. 19, f. 16, 17. 

 PFR., Monogr., iv, p. 658 (1859); vi, 290; Novit. Conch., p. 368, 

 pi. 84, f. 18-23. ARANGO, Fauna Mai. Cubana, p. 101. Cerion 

 vulneratum P. and V., Proc. Acad. Nat. Sci., Phila., 1896, p. 326. 



Quite distinct by its rather thin shell, long, cylindrical form, and 

 richly variegated color pattern, in which either purplish-brown or 

 white may predominate. Rather rarely the dark markings almost 

 disappear, leaving the shell whitish. In sculpture and coloration it is 

 like the very much stouter C. torrei, which I believe to be closely 

 related. 



VI. Group of C. scalarinum. 



Umbonis MAYNARD, Contrib. to Sci., iii, p. 28, type S. scalarina. 



Shell strongly ribbed and densely sculptured with incised spiral 

 striae. Parietal tooth short and median. 



An aberrant group, related to both the preceding and the follow- 

 ing groups; these three being probably modifications of a common 

 Cuban stock. At least two of the known forms are from the 

 Bahamas. 



Certain forms of C. mumia and C. dimidiatum show incised spiral 



