BRACHYPODELLA, JAMAICAN. 105 



I do not overlook the possibility that the western and east- 

 ern forms here brought together may be related more nearly 

 to the respective forms of the preceding race than to each 

 other ; but it seems simpler at present to group similar forms 

 together. The Swift River minima is shown in pi. 4, fig. 33. 



48c. Var. striata nov. PL 2, fig. 9. 



Related to var. eos, but more slender, more strongly and 

 ^coarsely striate than any other variety. The sculpture of a 

 specimen from Mt. Stewart is shown in fig. 9, magnified to the 

 same scale as the other detail figures of sculpture. Specimens 

 are before me from Withorn (Henderson) and Mt. Stewart 

 (Jarvis), in Westmoreland. Specimens measure 13 x 2.1 mm., 

 with 15y 2 whorls, to 11 x 2.1 mm., 13y 2 whorls (Mt. Stewart), 

 and 11x2 mm., 13 whorls (Withorn). The axis is like that 

 of var. eos. It is a much more slender shell than var. striatula. 



4Sd. Var. occidental nov. PL 4, fig. 31 ; pi. 2, fig. 11. 



Shell larger, the whorls less shortened, distinctly though 

 finely striate; neck rather long. .Axis more slender than in 

 the preceding forms, widest in the fifth whorl up. 



Length 17, diam. 2.9 mm., whorls 15%. 



Length 15.5, diam. 3 mm., whorls 14. 



Length 12.5, diam. 2.2 mm., whorls 14. 



Great Valley estate, Hanover (type loc., Taylor, in Clapp 

 coll.) ; Withorn estate (Henderson) and Fort William (Jar- 

 vis) , Westmoreland. 



The specimens from Withorn are like those from the Great 

 Valley estate. Those from Fort William are larger, with the 

 axis widest in the sixth whorl ; measuring 21 x 3.1 mm., with 

 17 whorls, to 17.3 x 2.6 mm., with 16 whorls. 



It will be noted that in this race the number of whorls is 

 less than the number of millimeters in the length, while in the 

 races minima and eos, as well as in typical alba, this propor- 

 tion is reversed. I have already described the flexible internal 

 process of this variety (pi. 1, figs. 14, 15). 



48e. Var. striatula C. B. Ad. 



" Stride very distinct under a common magnifier; length 

 .52, breadth .11 inch " (13x2.75 mm.). Locality unknown. 



