296 SPIROSTEMMA. 



Var. tenera C.B.Ad. "also resembles C. dunkeri in color and 

 C. rubra in form. It is very small, has the aperture orbicu- 

 lar, and the striation microscopic. It loses 6 whorls by trun- 

 cation and has 10 remaining. Length .28 inch., breadth .055 

 inch." (C.B.Ad.). 



Some specimens before me, probably referable to this 

 variety, are larger, length 8.4, diam. 1.8 mm. (pL 37, figs. 

 92, 93). 



14. S. ABNORMIS (Vendryes). PI. 34a, figs. 5, 6. 



"Shell deeply rimate, cylindrically elongated, color brown 

 with a very slight tint of yellowish- red, shining ; spire broadly 

 truncate with the loss of whorls, whorls remaining 9, the 

 last and the three following it are more drawn out and con- 

 sequently deeper than the remaining ones, the last is slightly 

 narrower in diameter than the second, the second than the 

 third, and the third than the fourth, thence the remaining 

 whorls become less deep and gradually diminish in diameter 

 to the truncated apex, so that the outline of the shell presents 

 the form of a long, narrow, drawn-out purse, somewhat bulg- 

 ing about the middle, and thence tapering towards the bot- 

 tom; whorls slightly convex, obtusely angulated at the peri- 

 phery, sculptured with strong, thick lamella-like costulae cross- 

 ing the whorls obliquely, generally curvilinear, irregular in 

 some places and wavy here and there, extending to the very 

 shoulder of the whorls, the last whorl with a prominent carina 

 which extends to the back of the base of the aperture close 

 to the peristome; suture well incised; aperture inclining to 

 the right, the plane very oblique, peristome thick, nearly 

 white, smooth and shining, reflected all around, with a very 

 large, strong, elevated knob close over the spot where the 

 columellar lip should merge into the columella, and apparently 

 arched over the space of the entering rima beneath. Total 

 length, 11 mm. ; greatest breadth at middle of spire, 3 mm. ; 

 next above the aperture, 2 mm.; at the truncation, 2 mm." 

 (Vendryes). 



Jamaica: Parish of St. Ann, near Brown's Town, among 

 fine earth and vegetable debris from the roadsides. 



