192 



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

 umbonali maculis renosis obliquis notata : margarita argentea, ad um- 

 bones purpurea. Long. 1 -\ ; Lat. .,",: alt. \ poll. 



A beautiful and delicate shell, which 1 suspecl to be an inhabitant 

 of brackish or even fresh water. 



PjLANORBIS [Discus] DENTATU8. T. discoidea, solidula, pallide 

 cornea, utroque umbilicata ; anfr. :'> leviter striatis, supra et infra sub- 

 carinatis; sutura profunda ; apertura sublunata; labro intus callo 

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

 diam. A poll. Inhabits Cuba. J. Bartlett. 



05^ 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; intra convexa, nitida : anfractibus 6 sub- 

 convexis, externis prope suturam excavatis: apertura lunata, labro 

 angulato. Lat. il ; alt. -\ poll. 



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

 dytes Morelet, Rev. Zobl. 1848, and Journ. Condi. 1850.] 



Bruvirs kubicuxdulus. 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. 1,',; lat. 



To P o11 - 



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



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



BtTLIMUS INTERSTINCTUS. T. ovata, apice mainillata, imperfo- 

 rate, pallide incarnata, striis liturisque purpureis et pallidis hie et illie 

 variegata" ; anfractibus 7 ventricosis. ultimo magno, partem dimidiam 

 spirae aequante ; sutura" marginata, albida, notissime crenulata: aper- 

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

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



At ii a i iv \ torrida. T. ovoidea, apice mamiUata, rufo-castanea : 

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

 tra -t;i : Mitiu.i marginata, perspicue crenulata ; apertura parva, ovat§ ; 

 columella alba, fusco-marginata, basi leviter truncata; labro simplici, 

 ente, intus albo, incrassato. Long. Z\ ; lat. 1\ poll. 



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



Ai hatina [Subulina] inyoj.uta. T. turrits, elongata, apice 

 mamillata, imperforata, fu ; anfractibus 1 1 leviter striatis, 



quatuor superioribus sub-equalibus, ultimo carinato ; sutura impressa, 

 minutissime crenulata : aperture! ovata, spira' partem sextam sequante, 



