D I N E . 



Plate XL 



Fig. -if). (Mas. Cuming.) 



This little shell appears in Mr. Cnming's collection 

 with the name Cijlherea consangiiinea, C. B. Adams 

 (Panama Shells, p. 273). It is apparently a small speci- 

 men of a variety of C. lata. 



Species 47. (Mus. Cuming.) 



DioNE AusTRALlc.^. Dioii. tedd ovoid, suhftqidlaleraU, 

 tenui, compressiiisculd, albidd, ferriigiueo-rufo copiosi 

 radiald, versus umboni'S Uvidis, concenlrice dense tenni 

 lirato-slriatd. 



The Australian Uione. Shell ovate, nearly equilateral, 

 thin, rather compressed, white, copiously rayed with 

 rust-red, livid toward the uraboes, concentrically 

 densely finely ridge-striated. 



Hah. Torres' Straits, North Australia. 



A delicate and very characteristic species, nearly eqni- 

 hitei'al in form. 



Species 4.8. (Mus. Cuming.) 



DlONE PELLUCIDA. Bion. testd otald, siibaqidlaleraU, 

 lenniculd, fidvesceute-albd, ferrugineo-riifo radiatim 

 niacnlatd, Imvigatd, vel tenui cuncentrice striata. 



The pellucid Dione. Shell ovate, nearly equilateral, 

 rather thin, fulvous white, radiately blotched with 

 rust-red, smooth, or finely concentrically striated. 



Cytherea pellucida, Lamarck, Anim. s. vert, vol.vi. p. 313. 

 Dione pellwMa, Deshayes. 



Hab. ? 



This, and the shell which 1 have called 1). Juslralica, 

 have a strong general resemblance, but the umboes are 

 more central and tumid in B. pellucida, which is altogether 

 of a dift'erent character and composition. 



Species 49. (Fig. a, b, Mus. Cuming.) 



Dione ustulata. Bion. lestd globoso-cimciformi, solidd, 

 pallide ustulaio -fused, purpureo-violaceo postice et ver- 

 sus marginem ventralem tincid, concenlrice siibrude 

 striatd, lumdd ampld, superjiciarid. 



The scorched Dione. Shell globosely wedge-shaped, 

 solid, pale burnt - brown, stained jiosteriorly and 



towards the ventral margin with purple-violet, con- 

 centrically rather rudely striated, lunule large, super- 

 ficial. 

 Hub. Swan Kiver and New Caledonia. 



Allied in general aspect to B. citrina, bvit of a more 

 gibbous, wedge-like form. 



Species 50. (Mus. Cuming.) 



Dione virgo. Bion. testd siibtrigono-OBatd, suhcordatd. 

 solidd, sordide alba, ad uin.bones sajie roseo-tincld, con- 

 cenlrice rngoso-striald. 



The virgin Dione. Shell somewhat triangularly ovate, 

 solid, dull white, often tinged with rose at the um- 

 boes, concentrically roughly striated. 



Cliione virgo. Gray, Cat. Cyth. Anal. vol. viii. p. 30G. 

 Dione virgo, Deshayes. 



Hab. Java. 



Of simple character, mostly distinguished, however, by a 

 blush of rose about the umboes, which is more conspicuous 

 in the interior of the shell. 



Species 51. (Mus. Cuming.) 



Dione Torresica. Bion. testd globoso-caudatd, tenui, 

 inflatd, fulvescente-albd, ferrngineo-rufo radiatim as- 

 persd, circa viargineni posticnni purpureo-violaceo 

 tiuctd, lunula et area ligamenti purpureo-violaceis. 



The Torres Dione. Shell globosely cordate, thin, in- 

 flated, fulvous white, radiately sprinkled with rust- 

 red, tinged w4th purple-violet about the posterior 

 margin, lunule and ligamentary area purple-violet. 



Hab. Torres' Straits, North Australia. 



There is a close resemblance between the general detail 

 of character of this and the species from the same locality 

 which I have named B. Auslralica, but these are widely 

 difl:erent in form. 



Species 52. (Mus. Cuming.) 



Dione subpeli.ucida. Dion, testd subobliqui ovald, 

 compressiu.iculd. tenui, fulvescente-albd, ferrugineo- 



October, IS 63. 



