DIONE 



Plate V. 



Species 10. (Fig. a, b, Mus. Cuming.) 



DiONE vuLNERAT.i. Dioii. tedd orbiculari, lacted, uu- 

 rmilio-fnsco tincld tenniradiatd ut marmoratd, intens!- 

 violaceo conceiitrici lineald, widique concentrici pli- 

 cato-slriatd. 



The wounded Dione. Sliell orbicular, cream-colour, 

 tinged, iinely rayetl and mottled with orange-brown, 

 concentrically liiieated with deep violet, concentrically 

 plicately striated throughout. 



Cytherm mlnerata, Broderip, Pro. Zool. Soc. 1S35, p. 46. 

 Dlone vuhierata, Deshayes. 



Hub. Real Llejos, Central America. 



An exquisitely-painted shell, delicately pencilled with 

 orange-brown and violet ou a ground of \^•arm cream-co- 

 lour. 



Species 17. (Mus. Cuming.) 



I)io}<e gigaxtea. Dion, iedd obloiujo-ovali, compressd, 

 spadiceo-albd, caridm-r/rkeo radlatd, epidermide corned 

 castaned versus riwrginem indiitd, laviyaid, tel conceri- 

 trice pUcato-striatd. 



The gigantic Dione. Shell oblong-oval, compressed, 

 fawn-white, rayed with blue-grey, covered towards the 

 margin with a chestnut horny epidennis, smooth, or 

 concentrically plicately striated. 



Venus (ji(]o.ntua, Chemnitz, Conch. Cab. vol. x. p. 354'. pi. 

 171. f. 1061. 



Cytkerea yiganlea, Lamarck. 

 Dione (jigantea, Deshayes. 



Hah. Day of Mexico. 



This well-known species is one of the few shells in 

 which the radiated paiutiug is of a blue-grey colour. To- 



wards the margin it is covered by a thin chestnut huruy 

 epidermis. 



Species 18. (Mus. Cuming.) 



Dione eutila. Dion, testa suhquadrato-ovatd, erassd, 

 fidvo-Iacied, riifo-fmco copiose interrupte radiatd, wi- 

 dique conceutrice plicato-striatd, lunula et ared Vuja- 

 menii conspicue ttudulalo-maculatis. 



The ruddy Dione. Shell somewhat squarely ovate, 

 thick, fulvous cream-colour, copiously interraptedly 

 rayed with red-brown, concentrically plicately striated 

 throughout, lunule and ligamcutary area conspicu- 

 ously wave-blotched. 



Vytherm rutila, Sowerby, Thes. Conch, p. 743. pi. 103. 

 f. 205. 

 Dione rutila, Deshayes. 



llab. ? 



A compressed solid shell, conspicuously painted, especi- 

 ally about the margin of the lunule and ligamentary area. 



Species 19. (Mus. Cuming.) 



Dione striata. Dion, testa yloboso-cordatd, tnmidd, 

 Jlavescente, postice fumeo-violaceo abrupte radiatd, con- 



centrice dense pUcaio-striatd. 

 The striated Dioke. Shell globosely iieart-shaped, 



swollen, yellowish, posteriorly abruptly rayed with 



smoky violet, concentrically densely plicately striated. 

 Cldone striata, Gray, Analyst, vol. viii. p. 306. 



Bione citriiia, var. Deshayes. 

 Hab. Philippine Islands ; Cuming. 



Compared with D. cilriiia this species is of a more 

 globose cordate form, less solid, and more swollen. 



August, 1863. 



