256 CKRION, GROUP XI. 



The prominent features of this sub-species are its fine riblets, very 

 narrowly expanded or subreflexed lip, dark interior, mottled coloring 

 and the raised ridge across the parietal wall. A large series of 

 specimens agreeing exactly with Bonnet's description and figures is 

 before me. A long and a short example, collected last year at 

 Nassau by Mr. J. J. White, are figured, pi. 40, figs. 8, 9. Typically 

 the color stripes or spots run over both ribs and intervals, but 

 occasionally the riblets are all white, as in a series collected by Mr. 

 Bendall on New Providence, pi. 40, figs. 10, 11. Bonnet's original 

 figures are copied on pi. 40, figs. 5, 6, 7. 



Form curtissii Maynard (pi. 40, fig. 12) is rather pale with sparser 

 dark maculation, looking a little bleached beside the typical varium. 

 Tavrny or ochre patches replace part of the white. The aperture is 

 typical, but riblets often more spaced, 21 to 25 on the penult, whorl. 

 The type .98x.40 inch, is almost exactly the size of the type of 

 varium ; but smaller specimens are common. The young have only 

 a columellar lamella. Type locality is the north side of the ceme- 

 tery between Waterloo pond and Nassau. It occurs also outside the 

 cemetery wall to the west, and near the western border of the pond 

 mentioned. In Maynard's " form no. 1 " (pi. 40, fig. 13) the dark 

 markings are faint or disappear, the lip is perceptibly thicker, and 

 the riblets more numerous. It " is inclined to occur to the westward 

 of the type location." u Form no. 2" (pi. 40, fig. 14) is elongate 

 with 11 whorls, 21-27 riblets on the penult., lip rather thick, color 

 typical. Occurs to the southward of type locality. " Form no. 3 " 

 is like the preceding, but with thinner lip. Occurs southward and 

 eastward of type locality. '* Form no. 4 " is the size of the type, 

 but the riblets are reduced irregular growth-lines except behind the 

 lip, blotches large and dark. Five were found "among some 

 banyan trees that stand on the top of a little hill in the cemetery, 

 near an old ruin." " Form no. 5 " is similar to the type in form and 

 color, a little smaller, and the peristome is built forward and very 

 thin. The parietal lamella is larger, three times as long as high, in 

 most specimens. Spotter's Key, an islet in Nassau Harbor, lying 

 about a third of a mile from the cemetery. Form nivea Maynard 

 (pi. 40, fig. 15) varies from pure white to the ordinary color of 

 curtissii. It is rather thin, and the parietal lamella often smaller 

 than in curtissii. It occurs clinging to the trunk and limbs of the 

 banyan tree near the old ruin in the cemetery mentioned above. 



