14 PSEUDOSTROMBUS. 



B. ANNULATA, Lam. PI. 5, lig. 74. 



Yellowish white, colnmella white. Length, I'd inches. 



Narrower than the preceding species, and covered with 

 revolving striae; yet it may be onl^- a variety' of it. 



B. ARMATA. Gray. PI. C. figs. 82, 83. 



Yellowish white, with two broad, faint, chestnut bands. 



Length, 1-2 inches. 



Rio Negro, Patagonia. 



This species is considered by d'Orbigny merely a spinosc 



variety of B. cochlidium. 



Sub>5enus Pseudostrombus, Klein. 



Leiodomus Swainson, cannot be distinguished as a subgenus, 

 the distinctive characters gradually merging in those of Pseudo- 

 strombus. 



B. TURRiTA, Gray. PI. fi, fig. 84. 



Shell smooth, very finely' plaited at tlie sutures; white, some- 

 times obscurely brown-flamed on the lower part of the body 



whorl. Length, r25-l"5 inches. 



Habitat unknown. 



Very like the next species, but is somewhat longer and 



narrower, with more convex whorls; the plications shorter, only 



occupying a small portion of even the spiral whorls, fainter, not 



decussated by revolving striae. 



B. MELANOiDEs, Dcsh. PL 6, figs. 85, 86. 



LTpper whorls crossed by well-marked plications, body wliorl 



sometimes onl}^ plicate on the upper part; revolving striae 



decussate the plications of the spire. Color, j-ellowish white, 



sometimes with a chocolate-colored narrow band near the sutures 



and a broader one at the base, or whole surface clouded or covered 



with chocolate. Length, 1-1 •25 inches. 



Cochin China; Mozambique. 



B. Mozambire.ii.His, E. A. Smith (fig. 86), is described from a 



well-grown specimen of the dark-colored variet3\ 



B. GRANULOSA, Lam. PI. (), fig. 91. 



Chestnut or chocolate, sometimes obscurely banded on the 



periphery', with a double I'ow of bead-like nodules revolving 



below the suture. Length, 1 inch. 



Gabon Coast, W. Africa. 



