PSAMMOBIA. 



Plate VIII. 



Species 55. (Mus. Hanley.) 

 PsAMMOBiA CASTA. Piam. tedd obJongo-ovatd, plano- 

 convexd, pellueido-albd, pallidi rosacea, postice jkxn- 

 oso-angulatd, sulcis linearibui femiissimis oblique sciilp- 

 td, ad angulum postiaim interruptis. 

 The chaste Psammobia. Shell oblong-ovate, flatly con- 

 vex, transparent white, faintly rose-tinted, poste- 

 riorly flexuously angled, obliquely sculptured with 

 very fine minute linear grooves, which are inteiTupted 

 at the posterior angle. 

 Hnb. Guatemala. 



A very delicate semitransparent shell, sculptured ob- 

 liquely with very fine linear grooves, which terminate 

 some little distance before reaching the posterior flexu- 

 osity. 



Species 56. (Mus. Cuming.) 



Psammobia parvula. Psam. testd oblongd, planiusculd, 

 posiwe impresso-Jlexuosd, tenuisdme decussatini striald, 

 nitente-albd, versus umbonein cameo tinctd. 



The small Psammobia. Shell oblong, rather flat, pos- 

 teriorly impressly flexuous, finely decussately stri- 

 ated, shining-white, flesh-tinged towards the umbo. 



Hab. ? 



Of very simple form, but distinct from any hitherto 



described species. 



)7. (Mus. Cuming.) 



Psammobia vaginoides. Psam. testd oblongo-ovatd, 

 convexiuseuld, cequilaterali, lateribus rotundatis, term- 

 issime decussatim striata^ sordide alba, versus umbonem 

 rosaced, epidermide siramined ad marghiem indutd. 

 The sheath-like Psammobia. Shell oblong-ovate, 

 rather convex, equilateral, sides rounded, very finely 

 decussately striated ; dull white, pink towards the 

 umbo, covered at the margin with a straw-coloured 

 epidermis. 



Hab. ? 



Equilateral, with the sides uniformly rounded, pink- 

 tinged about the umbo, with a pale straw-coloured epi- 

 dermis at the margin. 



Species 58. (Mus. Cuming.) 



Psammobia lineolata. Psam. testd oblongd, ad latera 

 subacuminatd, plana, postice subattgulato-Jlexuosd ; car- 

 neo-rosaced, lifieis opaco-albis concentrice fasciatd. 



The LiNEOLATED PsAMMOBiA. Shell oblong, somewhat 

 acuminated at the sides, flat, posteriorly, slightly 

 angularly flexuous ; flesh-pink, banded with irregular, 

 concentric, opake white lines. 



Gray, MS., Mus. Brit. 



Hab. New Zealand. 



A rather flatly-compressed shell, of a deep flesh-pink 



colour, peculiarly marked with wliitish concentric bands 



and lines. 



Species 59. fFig. a, b, Mus. Cuming.) 



Psammobia convexa. Psarrt. oblongo-ovatd, plano-con- 

 vexd, crassiuscitld, lateribus subagualibus, lavigatd, 

 nitente ; carneo-albd, rosacea varie radiatd el minu- 

 tissime marmoratd. 



The convex Psammobia. Shell oblong-ovate, flatly con- 

 vex, rather thick, sides nearly equal, smooth, shining ; 

 flesh-white, variously rayed with pink, and very mi- 

 nutely mottled. 



jfab. ? 



Distinguished chiefly by its convex though flattened 



form. 



Fig. 60. (Mus. Cuming.) 



Psammobia cjirulescens. Psam. testd subelougalo-ob- 

 loiigd, depressd, postice late superficialiler Jlexuosd, 

 subangulaid, striis elevatis obliquis sculptd, striis ad 

 angulum posticum interrvptis ; pallide violaceo-creru- 

 lescente, umbonihis purpurea biradiatis. 



The bluish Psammobia. Shell somewhat elongately 

 oblong, depressed, posteriorly broadly superficially 

 flexuous, slightly angled, sculptured with obhque 

 raised stria;, stria' interrupted at the posterior angle ; 

 pale violet-blue uraboes, two-rayed with purple. 



Lamarck, Anim. sans vert. vol. vi. p. 170. 

 Psammobia bipartita, Philiiipi. 



Hab. Ceylon. 



Of a delicate violet-blue, with the sculpture suddenly 



interrupted at the edge of the posterior angle. 



June, 1857. 



