874 
VARIETIES OF NASSA. 
Trivittata, Say. Invert. Mass., p. 364, pl. 632. 
Brant Point, Halifax, Georgia, ete. 
Gibbsii, Cooper ; is an intermediate form between the last and 
following shells— Puget Sound. 
Mendica, Gould. Ditto. 
With three rufous bands (hence the name N. trivittata) as in 
fasciata, Lam., and otherwise very like young specimens of 
it. “Specimens from Nantucket have the inner margin 
thickly coated to a considerable extent with enamel, while 
those found near Boston have none.”—Gould. 
Narrow and more elongated. 
Fasciata, Lam., vol. 10, p. 169. Reeve, pl. 6, f. 40. Australia. 
A large white variety, with large granules. 
Quoy. and Gaim. “ Voy. del’ Astr.,” pl. 32, f. 18-21. 
Reddish-brown, with pale bands. Port Adelaide. 
Short, broad, pale yellow with a narrow brown band. 
Young, resembling varieties of N. trivittata, Say. 
White, with very dark brown bands. 
5,  heither spotted nor banded. 
Tubercles on the columella almost obsolete ; the inner edge of 
the lip is plain. 
Columella smooth. 
with a single row of nodules. 
” 
* » double ee 
8 With somewhat square nodules. 
Banded with red, brown, and white. 
Closely granular, whorls rounded ; is the N. spurea, Gould. 
Proc. Bost. Soc. Nat. Hist., 1860. St. Simon’s Bay. 
Intermediate between N. fasciata, Lam., and N. caperata, Phil. 
Caperata, Phil., Abbild., pl. 2, f. 18. Philippines. 
Passing into the varieties of N. pauperata, Lam. 
Deshayesiul, Homb. and Jacq. 
Nodulifera, Phil., Abbild., pl. 1, f. 3. 
Whorls more regular and less noduled. 
Ribs oblique, resembling the narrow forms of N. miga, Adams. 
More elongated, passing into the varieties of the N. incrassata, 
Mill. 
Angulifera, A. Ad. P.Z.8., 1851, p. 109. Galapagos Islands. 
