2 IS SIM I't ].<>]- I -. 



S. MIKK-I I't'eirter. 1'njiijnred. 



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

 plicate, "pellucid, rather shining; olivaceous*C0Foeous. Spire short, 

 clinic, acute; whorls 1. moderately convex, separated l>y a Munewhsit 

 channelled suture, the last wlmrl inflated, regularly deseeinling. 

 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 

 17.]. mill. (/Y/-.) 



Ktpin'tn Santo, Hrir.il (Miers. in Cuming coll.). 



S. infersi PIT;., Malak. Blatter, iii, 18,j(>, p. 2iU : Monogr. iv, p. 

 800; v, p. 21. 



Known to me by the above description only. 



S. TKYONI Pilsbry, n. sp. PI. 04, Hg. 92. 



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

 olivaceous; surface lusterless, rather irregularly corrugated, and 

 under a strong lens seen to be spirally sculptured irft/i extremely fine, 

 dense, c-nti>-nlnr strfcc, passing over (he 1'olds and intervals. Whorls 

 4],, the last gloliose. Aperture very ohli(|iie, rounded-ovate, the 

 jierisiome thin anil .sharp; columella regularly arcuate. 



Alt. 2<>, diam. 19, longest axis of aperture 16, width 12 mill. 



Hrazil (J. G. Anthony). 



The folds are much less regular than in .S'. r/if'oriri'iiit, and that 

 speci'-s shows no spiral striation. 



S. |>KI I>>AIA Pfeiller. Uiifi </u ml . 



Shell COniC-Subglobose, very thin, r/o.vc/// plicate ami rather rei/n- 



larli/ i/i-riissafei/ In/ spiral sulci ; pellucid, shilling, olivaceous-corneous. 

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

 convex, the la-l one vent ricose. Aperture oliiiipie, rounded-oval, 

 -liu'lillv angular aliove ; perislome .-imple. nuexpanded : coluniellar 

 margin lightly arcuate, very >lightly twi>ted aliove. All. 11. greater 

 diam. 12].. leaser H> mill. ( I'j'r.) 



r,tr<>p,,lis. near Ri Janeiro, lira II (Micrs, in Cuming coll.). 



Simpnln/isis tlei-ns-ia/a l'i i;., Malak. HI. iii. iS.'iC,, |i. i'1'.O; Monogr. 

 iv, p. soil : v, p. 22. 



I lia\enoi >een this species, wbicli is apparently well distinguished 

 by its spiral groo\e- decu>-ating the longitudinal folds. 



