268 CERION, GROUP XII. 



Length 30, diam. 11^ mill.; aperture with peristome 11 mill, long 

 { Weinl.). Bahamas : Crooked Island (Weinland). 



Pupa martensi WEINL., Malak. Bl. ix, 1862, p. 194. PFR., Novit. 

 Conch, p. 364, pi. 84, f. 3-5 ; Monogr. vi, p. 290. SOWB., C. Icon, 

 pi. 2, f. 15 (bad). 



This species is distinguished by its extremely Jine, close striation, 

 which is perhaps more minute than in any other species. The 

 color-pattern of ragged stripes is common to allied forms. The 

 specimen before me, received from the author, has been inhabited by 

 a hermit crab, and I fancy that the absence of the usual axial, and 

 small size of the parietal lamella, noted by Weinland in his original 

 description, may have been due to the wear caused by similar 

 occupants of all the specimens. Many specimens are smaller than 

 the type. That before me measures 26 mill, long, 10 wide. A still 

 smaller one is figured by Pfeiffer, from the original lot (fig. 73). 



C. MULTISTRIATUM Pilsbry & Vanatta. PI. 44, fig. 82. 



Shell small and rather thin, shortly rimate, short cylindrical ; 

 white, longitudinally marbled with gray or chestnut-brown. Whorls 8 

 to 8^, the latter two or three about equal in diameter, the rest rapidly 

 tapering, apex obtuse. Sculptured with excessively fine, close, 

 sharp thread-like striae, apical 2 whorls smooth. Aperture rounded 

 ovate, obliquely truncate; peristome narrowly reflexed ; parietal 

 callus moderate or very thin; axial fold median, moderate; parietal 

 tooth extremely small. 



Length 17, diam. 7 ; alt. of aperture 6^ mill. 



Length 14, diam. 7 ; alt. of aperture 5 mill. 



Bahamas: Crooked Island (Bland). 



C. multistriatum P. & V., P. A. N. S. 1896, p. 335, pi. 11, f. 8. 



This is a small, extremely fine striated form with very small 

 parietal tooth. It is represented in the collection of the Academy 

 by five specimens, given by Mr. H. D. Van Nostrand, and originally 

 from Bland. The striation is about as fine as in the much larger, 

 usually more tapering, C. martensi, of which, indeed, this may 

 prove to be a diminutive race. 



C. MARMORATUM (Pfeiffer). PI. 38, figs. 86, 87, 88, 89, 90. 



" Shell rimate-perforate, subcylindric-ovate, solid, striatulate, 

 glossy ; snow-white, ornamented with longitudinal, chestnut, diaphan- 



