MOLLUSCA. 59 



his B. monilifer from Tavoy, in Siam ; he has, however, very kindly forwarded specimens of 

 that species, which proves to be clearly distinct, and will be figured in a supplementary 

 plate to the monograph of the genus in Conch. Icon. 



52. HELIX, Linnceus. 



1. Helix calliostoma. PI. XIV. Tig. 7 a, b. H. testa obconica, obtecte perforata, valde carinata, 

 alba, superne planiuscula, transvershn oblique striata, striis interrupts, longitudinaliter lineis impressis 

 obsita, cingulis angustis et maculis rufo-violascentibus circumdata, anfractibus quatuor ad quinque, plani- 

 usculis, basi convexa, infra carinam concava, reticulato-striata, fasciis rufescentibus multis circumdata, 

 apertura angulata, depressa, intus purpureo-violascente, peristomate intus incrassato, rubicundo. 



Hab. ? 



A solid depressed sharply-angled species, encircled throughout with irregular brown 

 and purple-brown linear bands, whilst the aperture is deeply stained with violet-red. 



2. Helix curvllabruii. PL XIV. Fig. 9 a, b. H. testa conica, perforata, basi acute carinata, 

 lsevi, flavicante, prope suturam cingula lata rufo-castanea, basi planiuscula, omninb castanea, apertura sub- 

 angulata, depressa, obliqua, margine superiore dilatato, inflexo, peristomate incrassato. 



Hab. Philippine Islands. 



A flattened conical shell, conspicuously umbilicated, with the lip peculiarly curved at 

 the edge. The base is of a dark reddish chestnut, the spire yellowish, spirally banded with 

 the chestnut colouring against the sutures. 



3. Helix tropidophoea. PL XIV. Pig. 14. H. testa subdiscoidea, imperforata, valde carinata, 

 carina acuta, prominula, brunnea, striis minutis confertis reticulata, anfractibus quinque, convesiusculis, 

 apertura lonato-transversa, angulata, peristomate simplici, acuto. 



Hab. Borneo. 



A comparatively thin shell, with simple lip, very sharply keeled, of which the base has 

 a shining horny aspect. 



4. Helix obscurata. PL XIV. Fig. 18. H. testa discoidea, late et profunde umbilicata, olivacea, 

 oblique striata, striis transversis distinctis decussatis, spira depressa, anfractibus ad quinque, rotundatis, 

 apertura lunato-rotundata, labio simplici, acuto. 



Hab. Borneo, under decayed leaves in the forests. 



A small rounded species, composed of rounded whorls, broadly umbilicated, after the 

 manner of the large II. BanJcsii. 



5. Hellx Tatloriana. PL XV. Fig. 2 a, b. H. testa conica, trochiformi, lsevi, imperforata, sub- 

 pellucida, basi acute carinata, fulva, ad apicem carneola et reticulata, maculis sparsis perlucidis fuscis 

 obsita, oblique striata et transversim subtilissime rugulosa, spira acuta, basi convexiuscula, fulva, circa 



