OXYSTYLA, ANTILLES. 107 



authority of specimens in the collection of Sir Rawson Rawson, 

 which he received from the late Thomas Bland (0. zebra Miill., 

 Proc. Malac. Soc. Lond. i, p. 306). 



This species has been reported from St. Thomas by Strebel, who 

 gives the following notes : 0. undatus, form B ; form from St. 

 Thomas. A specimen in the Berlin Museum, from Gruner. It 

 differs from those of Jamaica in the more ventricose form, and the 

 less oblique, sinuous columella. The flame-marking continues over 

 half the last whorl, the general coloration being characteristic of the 

 species; embryonic whorls with a small brown tip; the peripheral 

 and upper spiral bands are well developed on the latter half of the 

 last whorl. Alt. 60.1, diam. 36.3, length of aperture 35 mill. ; whorls 

 6^. (Beitrage Mex. Land- und Siisswasser-Conchylien, v. p. 27). 



The locality lacks verification by other observers, and can hardly 

 be accepted unreservedly until confirmed, although in view of the 

 occurrence of the species in the Bahamas, there is nothing intrin- 

 sically improbable in the record. It is evidently the typical form of 

 the species. 



Mr. Bendall reports the species living high up in large trees in 

 New Providence, Bahamas (0. zebra Brug., Bendall, Proc. Malac. 

 Soc. Lond. i, p. 293). He very kindly sent me a young specimen, 

 which proves to be like the Trinidad form in markings and apex, 

 and the dark parietal callus. 



A specimen from Andros, Bahamas (J. J. White), before me be- 

 longs also to the dark tipped, chestnut calloused Trinidad form. It 

 would seem therefore that in the Bahamas, 0. undata belongs to the 

 typical form, not to the Jamaican or Floridian races. Whether 

 man's intervention has been a factor in the distribution of 0. undata 

 is problematic. 



Var JAMAICENSIS n. v. PI. 27, figs. 19, 20, 21, 22, 23. 



Form more elongated ; solid ; destitute of cuticle ; white with numer- 

 ous bluish-black or bluish-brown stripes, mostly continuing on the base 

 to the columellar callus ; bands variable, but rarely so conspicuous on 

 the spire as in Trinidad shells; apex white; aperture showing blackish 

 bands and streaks within, more or less distinctly, on a white ground ; 

 the lip black or dark brown ; parietal wall with a thin ivash of diluted 

 chestnut, or if it be moderately dark, there is a white zone around the 

 insertion of the columella; columella a little sinuous or concave. 



