SPIROSTEMMA. 297 



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

 >1. 1, f. 5, 6 (May 1, 1901). 



Described from a single specimen in coll. Vendryes, possi- 

 )ly a pathologic 8. tenella. The name has been used for 



Cuban form but not defined, so this Jamaican form need not 

 renamed. 



L5. S. PUSILLA (C. B. Adams). PL 37, figs. 84-87. 

 Shell very small, narrowly fusiform, widest in the middle, 

 ipering towards both ends, pale brownish corneous. Stris9 

 lelicate and narrower than the intervals. Whorls 7 to 8, 

 loderately convex, the last angular around a very narrow 

 mcave basal area. Aperture very oblique, rounded; peri- 

 tom? obtuse, slightly expanded, the upper margin adnate 

 the preceding whorl. Internal axis strongly spiral in the 

 two whorls, showing a wide corkscrew spiral when viewed 

 :rom the base, in the aperture. Length 6, diam. 1.6 mm. 

 Jamaica: Aenon Town, St. Ann (P. W. Jarvis). 

 Cyl. pusilla C.B.A., Contrib. no. 7, p. 102 (April, 1850). 

 PFR., Monogr., iii, p. 581. 



The smallest member of this group. It is related to 

 S. tenella, but differs by its smaller number of whorls and 

 shorter, more fusiform contour. 



