192 



ovato-oblongata, sub-falcate ; colore luteo-viridescente, supra cost;! 

 umbonali maculis venosis obliquis notata ; margarita argentea, ad urn- 

 bones purpurea. Long. I- 1 - ; lat. ^ i alt. i poll. 



A beautiful and delicate shell, which I suspect to be an inhabitant 

 of brackish or even fresh water. 



Planorbis [Discus] dentatus. T. discoidea, solidula, pallide 

 cornea, utroque umbilicata ; anfr. 3 leviter striatis, supra et infra sub- 

 carinatis ; sutura profunda ; apertura sublunata ; labro intus callo 

 albo incrassato induto ; fauce dentibus sex abditis armata. Axis, -^V ! 

 diam. A poll. Inhabits Cuba. J. Bartlelt. 



D^= Vol. i. 157, (Dec. 1843. ) 

 Specimens collected by Dr. George A. Perkins, Liberia. 

 Helix [Caracolla] pellucida. T. fragili, pellucida, pallide 

 cornea, orbiculari, carinata, vix perforata ; spira depressa, sub lente 

 striis subtilissimis decussata ; infra convexa, nitida : anfractibus 6 sub- 

 convexis, extends prope suturam excavatis : apertura lunata, labro 

 angulato. Lat. ^ ; alt. \ poll. 



[This is H. Africana Pfr. ; Proc. Zobl. Soc. 1848; and H. troglo- 

 dyte* Morelet, Rev. Zobl. 1848, and Journ. Conch. 1850.] 



Bulimus rubicundulus. T. oblongo-conica, tenui, rosaceo- 

 erubescente ; anfractibus 7 convexiusculis, ultimo obsolete carinato. 

 sutura marginata, albida, eleganter crenulata ; apertura ovata, colu- 

 mella tenui, labro subreflexo, intus sub-incrassato. Long. I- 1 -; lat. 



IoP o11 - 



Allied to B. Boholensis Brod., and is colored like some varieties of 



B. concinnus Brod. [It is a variety of the following.] 



Bulimus interstinctus. T. ovata, apice mamillata, impei-fo- 

 rata, pallide incarnata, striis liturisque purpureis et pallidis hie et illic 

 variegata ; anfractibus 7 ventricosis, ultimo magno, partem dimidiam 

 spira? aequante ; sutura marginata, albidii, notissime crenulata : aper- 

 tura parva, sub-quadrata ; columella rosacea, evolvente, postice sinu- 

 ata ; labro acuto, intus callo rosaceo incrassato. Long. 1| ; lat. ^-. 



AcnATiNA torrida. T. ovoidea, apice mamillata, rufo-castanea : 

 anfractibus 7 ventricosis, striatis, ultimo magno, basi deorsum con- 

 tracts ; sutura marginata, perspicue crenulata ; apertura parva, ovata ; 

 columella alba, fusco-marginata, basi leviter truncata. ; labro siniplici, 

 fuscescente, intus albo, incrassato. Long. 31 ; lat. 1^ poll. 



Allied to A . saulcydi, Guerin, a reversed species. 



Achatina [Subulina] involuta. T. turrita, elongata, apice 

 mamillata, imperforata, fuscescente; anfractibus 12 leviter striatis, 

 quatuor superioribus sub-equalibus, ultimo carinato ; sutura impress;!, 

 minutissime crenulata ; apertura ovata, spira? partem sextam aequante, 



