258 CERION, GROUP XI. 



Form albea Mayn. (pi. 41, fig. 31). On the south side of Spruce 

 Jey, a barren little islet north of Long Key, a few specimens, mostly 

 /dead, of " Slrophia albea" Maynard occurred. They are rather 

 .dai*k 'flesh-colored outside and within, or brown inside; uniform, or 

 ^with <the ribs a little paler. A specimen measures, length 23^, 

 diam. 10 mill.; ribs on penult, whorl 24. It seems nearly extinct, 

 ^as only three living ones were found. 



A peculiar 'form allied to varium, ritchiei and eburneum is illus- 

 trated, on <pl. 44, tfigs. 78, 79,80. It is pillar-like, some specimens 

 \very 'large .and long, with as many as 12^ whorls, others (fig. 79) 

 are much smaller. The lip is not expanded, aperture small with the 

 margins built forward. The locality is unknown, but as the speci- 

 mens occurred with Pleurodonte provisoria, Cepolis varians, the New 

 Providence form of Oxystyla undata, and some marine shells, it is 

 likely that they are from New Providence. 



iSubsp. CORYI Maynard. PI. 41, figs. 32-36. 



The oblong-cylindric shell is solid, strongly ribbed, intervals 

 thrown, in places black-brown, the ribs chiefly white, about 20 on 

 f*he penult, whorl. Aperture brown within, the peristome reflexed and 

 trecurved, thickened OH the face (fig. 34); parietal callus heavy and 

 ithick, but typically not elevated in a straight ledge. Parietal lamella 

 -strong and usually rather long; axial lamella small but distinct, 

 length 25, diam. 10-11 mill. There is also a short form, length 21, 

 diam- '.9-J-10 mill. This variety occurs en the extreme west end 

 of 'New 'Providence, on the bushes and herbage growing along the 

 bay. Five specimens, undoubtedly coryi, were taken by Mr. May- 

 >nard on Spruce Key, off Nassau, the type locality of " S. albea." 



Mr. Maynard's coryi, "form no. 5" (pi. 41, figs. 35, 36), is very 

 *mall, 17^x8 to 20x9 mill, has a distinct ledge or ridge across the 

 parietal wall, the outer lip is not reflexed or thickened, and there are 

 :about 25 riblets on the penult, whorl. Parietal lamella small. It 

 is very similar to "thorndikei" and exactly like some specimens 

 -.of " cinerea, form no. 1," of Maynard. According to Mr. Maynard, 

 there are many individuals of intermediate characters connecting 

 this form to coryi. 



Form neglectum Maynard (pi. 42, fig. 37). Whitish or gray- 

 'White, sometimes blue-tinted in the interstices, and usually obscurely 

 Showing a few dark blotches. Ribs irregularly and widely spaced. 



