I 4 PSE U DOST RO M BUS. 



B. ANNULATA, L.im. PI. 5, fig. 74. 



Yellowish white, columella white. Length, 1*5 inches. 

 Narrower than the preceding species, and covered with 

 revolving stria?; yet it may be only a variety of it. 



B. ARMATA, Gray. PI. 6, figs. 82, 83. 



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



Length, 1-2 inches. 



Bio Neyro, Patagonia. 



This species is considered b}^ d'Orbigny merely a spinose 

 variety of B .- cochlidium. 



Submenus Pseudostrombus, Klein. 



Leiodomus Swainson, cannot be distinguished as a submenus, 

 the distinctive characters gradually merging in those of PxciKln- 

 utrombu*. 

 B. TURRITA, Gray. PL 6, fig. 84. 



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

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



whorl. Length, 1 '25-1 '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. 



1>. MKLANOIDES, Desh. PI. 6, figs. 85, 86. 



Upper whorls crossed by well-marked plications, body whorl 

 sometimes only plicate on the upper part; revolving stria* 

 decussate the plications of the spire. Color, yellowish white, 

 sometimes with a chocolate-colored narrow band near the sutures 

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



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



Cochin China; Mozornbif/uc. 



/>. Mr.zfnnhiw.tixix, K. A. Smith (tig. 86), is described from a 

 well-grown specimen of the dark-colored variety. 



P>. <iRANri,osA, Lam. PI. 6, fig. 01. 



Chestnut or chocolate, sometimes obscurely banded on the 

 periphery, with a double row of bead-like nodules revolving 



below the suture. Length, 1 inch. 



Const, W. Africa. 



