DKYM^US, FLORIDA AND AVEST INDIES. 



f. 280, pi. x, f. F (teeth), pi. xv, f. J (genitalia); Man. Amer. Land 

 Shells, p. 406, f. 446, 447 ; Fourth Suppl. Terr. Moll, v (Bull. M. 



C. Z. xxii, no. 4), p. 191, pi. 1, f. 6. SIMPSON, Proc. Davenport 

 Acad. Nat. Sciences, v, p. 67 Liostracus dormoni TKYON, Amer. 

 Journ. Conch, iii, p. 169, pi. 13, f. 8. Drym&us dormant PILSBRY. 

 Nautilus ix, p. 115. 



Larger and more conic than D. dominions (marielinus} or D. mac- 

 ulatus. Figures 14 and 15 represent the typical form as found in the 

 northern St. John's valley, where it is large, rather opaque, and 

 more or less deficient in basal bands in the adult. Further south in 

 the St. John's valley the shells are generally thinner and smaller, 

 with two or three spot-bands above, and two continuous bands below, 

 the lower one circum-umbilical. While quite variable, D. dormani is 

 a perfectly distinct species, not especially close to any other described 

 form. Among other differences, D dominicus and its several varie- 

 ties have the two basal bands contiguous, the lower one not close to 

 the axis. 

 Var. albida B. H. Wright. PI. 5, figs. 16, 17. 



More slender and elongated than the type, whorls as many as 6J; 

 very thin and glossy ; whitish-hyaline, somewhat translucent, im- 

 maculate or with two or three subcontinuous brown bands, the sub- 

 peripheral band widest, circum-umbilical and peripheral indistinct. 



Alt. 32, diam. 15^, length of aperture 14^ mill. 



A " hammock " near Lake Helen, Florida. (G. W. Webster.) 



BulimuJus dormani var. albida WRIGHT, Nautilus iv, Oct., 1890, 

 p. 61. WEBSTER, t. c., p. 86. Cf. SIMPSON, t. c., p. 79 Bulimulus 

 dormani forma nov. subfafciatus COCKERELL, Zoe ii, p. 18 (April, 

 1891). 



The specimens figured are banded, but as Mr. Webster has pointed 

 out, they vary in the original locality by imperceptible stages from 

 3-banded to bandless. The bands are represented as too dark and 

 distinct in fig. 16. The narrow contour is characteristic of this local 

 form. 



D. DOMINICUS (Reeve). PI. 20, figs. 30, 31, 32 ; pi. 5, fig. 26. 

 Shell subperforate, ovate-conic, thin and fragile, yellowish or whit- 

 ish corneous, more or less translucent, with typically four or five spiral 

 dark-brown bands, the upper three (typically) interrupted into small 

 spots, the lower two continuous or nearly so, contiguous and nearly 



