SPIROSTEMMA. 289 



to about one-third above it, where the greatest diameter is 

 reached, and thence it tapers to the truncate apex; apex 

 truncate with the loss of 8 to 9 whorls, whorls remaining 10, 

 less deep and less flattened than on dunkeriana, the first two- 

 above the base subangular about the periphery, the last more 

 strongly carinated than in dunkeriana, with the carina con- 

 tinued down to the base of the aperture; striae very strong, 

 compact and wavy, extending across the whorls to the very 

 edge of the well-impressed suture; aperture oblique like that 

 of dunkeriana, but the peristome is thinner and is appressed 

 above to the penult whorl. Height 13 mm., greatest breadth 

 at the slender part of the spire 3 mm. ' ' ( Vendryes) . 



Jamaica : Bellevue, near Stony Hill, in the parish of Saint 

 Andrews (Vendryes; Gloyne). 



Cylindrella (Anoma) propinqua VEND., Nautilus xv, p. 3, 

 pi. 1, f. 7, 8 (May 1, 1901). Not C. propinqua Arango. 



' The shell comes near to dunkeriana, but it has 10 whorls 

 which are less planulate than on that species, and the striation 

 is rather coarser and less regular; the color of dunkeriana is 

 also different. Gloyne, in Journ. de Conch., vol. xx, reports 

 it as similis from Bellevue. Bland had identified them with 

 great doubt as similis. On closer examination they turned 

 out to be unlike similis or any other Jamaican species of 

 Anoma " (Vendryes). 



This form may belong to the tenella group. I have not 

 seen specimens. 



4. S. PRINCEPS (C. B. Adams). -PI. 36, figs. 76-80. 



Shell pillar-like, but slightly tapering near the broadly 

 truncate summit, brown, darker at the suture, or corneous- 

 brown throughout; finely, obliquely striate. Whorls about 

 lli/o to 12, flat, the last contracted above the very strongly 

 projecting basal keel; produced forward. Aperture inverted- 

 ovate, somewhat oblique, angular at the base; the peristome 

 reflexed. Internal axis moderately spiral, the false umbilicus 

 not visible in the aperture, or showing as a very small hole. 



Length 24, diam. 3.5 mm. 



Length 24.5, diam. 3.7 mm. 



