ON HELICINA PTEROPHORA, n.svp., FROM GUATEMALA. 
By E. R. Syxzs, B.A., F.L.S., etc. 
Read 8th November, 1901. 
Testa depressa, conoidea, tenuiuscula, sub lente dense malleata, 
cornea, infra suturas et ad peripheriam zona brunnea notata, apice 
obtusulo; anfr. 54, plano-convexiusculi, ultimus non descendens, 
acute carinatus ; Ee thins subtriangularis, intus ad carinam castanea, 
callum tenuissime circumscriptum ‘emittens ; peristoma album, ex- 
pansum, reflexiusculum, ad carinam valde rostratum, margine 
columellari sinuato, basali reflexo. Operculum ignotum. Diam. 
max. 22, min. 12mm.; alt. 8mm. 
Helicina pterophora, n.sp. 
ITab.—Guatemala (coll. Boucard). 
This striking shell recalls in form H. rhyncostoma, Shuttl., but may 
be readily separated by the difference in sculpture, the present species 
not being spirally striate, and also by its larger size. From 
iT. rostralis, Morel., its shape will readily distinguish it, while 
H. oxyrhynea, Crosse & Debeaux, appears to be a much smaller and 
more conic species. 
