140 UROCOPTIS OF JAMAICA. 



ambigua var. magna and var. elizabethensis. 



Fig. 56 of pi. 30 represents a specimen from Adams, of the 

 typical pinkish-brown color; length 29, diam. 10 mm., whorls 

 7%. Fig. 11 is a purple-pink specimen, length 26.5, diam. 

 10.2 mm., whorls 7%. According to Mr. Jarvis, the white 

 sutural band becomes more distinct in shells from the western 

 part of the range of the species. 



Much smaller forms than those above noticed also occur. 

 Figs. 13, 14, 15 represent a series from Mackfield collected by 

 Mr. Jarvis. The shells are about 24 x 8 mm., with 7y 2 to 8 

 whorls. Color a warm reddish chestnut (fig. 15) varying to 

 purplish pink-brown (fig. 14), the white band distinct, and to 

 a clear amethyst-purple (fig. 13) with narrow sutural band, 

 or even blue-purple, as in U. cylindrus. The purple forms at 

 this place appear as stragglers among the much commoner 

 pink-brown type. In everything but color the whole series is 

 practically alike. A few much smaller shells, doubtfully re- 

 ferable to U. dubia, are also found with them, and I am some- 

 what disposed to consider them as merely small zonata (pi. 29, 

 fig. 20). 



From the Great Valley Estate, Hanover, a series collected 

 by Mr. C. B. Taylor is before me (pi. 28, fig. 10). The shells 

 measure, length 24, diam. 7% to 8 mm., whorls 8. The color 

 is reddish purple-brown, dark or moderately pale, the white 

 band conspicuous. With them are specimens of a smaller, 

 more slender shell, pink in color, with a faint whitish sutural 

 band (pi. 29, fig. 27), which seem indistinguishable from the 

 typical U. ambigua, though west of the ordinary range of that 

 species. 



Group of U. nobilior. 



In U. nobilor the peristome is adnate above, in U. bacquie- 

 ana it is free. Otherwise the two species are somewhat 

 similar. 



17. U. NOBILIOR (C. B. Adams). PL 31, figs. 71-75. 



Shell shortly rimate, cylindric-tapering, light yellowish- 

 brown, often slightly darker at the suture; shining, sharply 



