1S80.] MR. K. A. SMITH ON NEW SHELLS. 4S5 



Spira subgradata, liallide lilacea. Anfr. ultimas ad peripheriam 



rotundatus, usque ad basin lineis subgranosis ornatus. Aper- 



tura late ovata, superne aliquanfo acuminata, intus cceruleo- 



alba, versus labrum oUvacea, longitudinis totiiis h haud eequans. 



Peristoma nigrescens, marginibus callo saturate olivaceojunctis. 



Long. 34 mill., diam. 23; aperturae long. 16, diam. 12. 



Hab. "Low land near the east coast of Africa, from 6° to 7° 



south latitude" {Capt. J. B. Spele). 



This interesting species is well characterized by its deep and wide 

 umbilicus, and the peculiar elevated transverse subgranular lines 

 encircling the whorls. They are about ten in number on the penul- 

 timate volution and about thirty on the last. The epidermis is of a 

 greenish-olive tint, and is varied at intervals by darker concentric 

 stripes, which probably indicate stages of arrested growth. 



Helix (Ampelita) percyana. (Plate XLVIIL figs. 12, 1 2a.) 



Testa tenuiuscula, depresso-globosa, mediocriter umbilicata, undique 

 minute subseriaiim granulata incrementique lineis perobliquis 

 sculpta.fusco-olivacea, opaco-lacteo sparsim/ulgurata, Anfrac- 

 tus 4, celeriter accrescentes, convexi; ultimus magnus, aliquanto 

 iiiflatus, antice deseendens. Spira prominula, ad apicem obtusa- 

 Apertura magna, transversa, parum obliqua, fere subhorizon- 

 talis, intus lilacea. Peristoma album, breviter expansum et re- 

 Jlexum, marginibus approximatis, columellari obliquo,rectiusculo, 

 vix arcuato. 

 Diam. max. 31 mill., min. 222, alt. 18. 

 Hab. Madagascar. (In Dr. J. Percy's collection.) 

 The ornamentation of this pretty species is very peculiar. The 

 narrow zigzag lines are irregular in their disposition, and of the same 

 opaque creamy colour as frequently adorns many of the species of 

 Orthostylus from the Philippine Islands. The granules which 

 cover the entire surface are disposed in somewhat irregular closely- 

 set transverse series, interrupted considerably by oblique lines of 

 growth. The texture of the shell is thin, and so transparent that 

 the fuigurations of the exterior are quite conspicuous through the 

 lilac interior of the aperture. 



EXPLANATION OP PLATE XLVIII. 



g. 1 . Conns consanguineu.% p. 478. 

 2. nepHmoidcs, p. 479. 



3. taylorianus, p. 480. 



4. albospira, p. 480. 



5. Tercbra mariesi, p. 480. 



6. Tropho7i stuarti, p. 481. 



7. Lattrus nagasakicnsis, p. 482. 



Fig. 8, 8a. Cyprtsa decipiens, p. 482. 

 9. Turbo {Pomaulax?) taylori- 

 anus, p. 483. 



10. Liotia crassibasis, p. 484. 



11. Paludina sjjc/cei, Y). 484:. 



12, 12a. Helix\Ai7ipclita) percyana, 

 p. 485. 



32* 



