218 SIMPULOPSIS. 



S. MIERSI Pfeiffer. Unfigured. 



Shell conic-subglobose, very thin, somewhat irregularly, strongly 

 plicate, pellucid, rather shining; olivaceous-corneous. Spire short, 

 conic, acute ; whorls 4, moderately convex, separated by a somewhat 

 channelled suture, the last whorl inflated, regularly descending. 

 Aperture oblique, ample, lunate-oval ; peristome thin, black-edged, 

 the right margin rather widely expanded, columellar margin hair- 

 like, somewhat twisted above. Alt. 17^, greater diam. 24, lesser 

 171 mill. (Pfr.) 



Espirito Santo, Brazil (Miers, in Cuming coll.). 



S. miersi PFR., Malak. Blatter, iii, 1856, p. 260; Monogr. iv, p. 

 800; v, p. 21. 



Known to me by the above description only. 



S. TRYONI Pilsbry, n. sp. PI. 64, fig. 92. 



Shell globosely semi-oval with conic, projecting spire, thin, light 

 olivaceous; surface lusterless, rather irregularly corrugated, and 

 under a strong lens seen to be spirally sculptured with extremely fine, 

 dense, cuticular striae, passing over the folds and intervals. Whorls 

 41, the last globose. Aperture very oblique, rounded-ovate, the 

 peristome thin and sharp; columella regularly arcuate. 



Alt. 20, diam. 19, longest axis of aperture 16, width 12 mill. 



Brazil (J. G. Anthony). 



The folds are much less regular than in S. rufovirens, and that 

 species shows no spiral striation. 



S. DECUSSATA Pfeiffer. Unfigured. 



Shell conic-subglobose, very thin, closely plicate and rather regu- 

 larly decussated by spiral sulci; pellucid, shining, olivaceous-corneous. 

 Spire moderate, conic, acute ; suture deep. Whorls 4^, moderately 

 convex, the last one ventricose. Aperture oblique, rounded-oval, 

 slightly angular above ; peristome simple, unexpanded ; columellar 

 margin lightly arcuate, very slightly twisted above. Alt. 11, greater 

 diam. 12, lesser 10 mill. (Pfr.) 



Petropolis, near Rio Janeiro, Brazil (Miers, in Cuming coll.). 



Simpulopsis decussata PFR., Malak. Bl. iii, 1856, p. 260 ; Monogr. 

 iv, p. 800 ; v, p. 22. 



I have not seen this species, which is apparently well distinguished 

 by its spiral grooves decussating the longitudinal folds. 



