DIONE. 



Plate XII. 



Species 55. (Mas. Cutning.) 



DiONE ANGULIFERA. DioH. oblongo-ovaU, posfice aiigiduto- 

 productd, fidoescente-allju, macuUs angularibns yriseo- 

 purpiireh radlatd, concentrice rugoso-striatd. 



The angular Dione. Shell oblong-oval, angularly pro- 

 duced on the posterior side, fulvous white, rayed 

 with angular greyish-purple spots, concentrically 

 roughly striated. 



Cijllwrea anguUfera, Soiverby, Thes. Conch, vol. i. ]). 035. 

 pi. 136. f. 189. 

 Dlone angulifera, Deshayes. 



Hah. ? 



This small species is chiefly distinguished by its angu- 

 larly prolonged growth on the posterior side. 



Species 56. (Mus. Cuming.) 



DiON'E piiASiANELLA. Diou. testd ohlougo-ovatd, soIidi.K.s- 

 culd, versus marghiem compressd, fulvescenU'-albd, 

 violaceo-castaneo varie linctd, imdulald et biradiatd, 

 lunula et area ligamenli violaceo-caslaiieis, concentrice 

 lineari-sulcatd, sulcis distinctis, tsquidistnntibns . 



The little pheasant Dione. Shell oblong-ovate, 

 rather solid, compressed towards the margin, fulvous 

 white, variously stained, waved and two-rayed with 

 violet-chestnut, lunule and ligamentary area violet- 

 ehestnut, concentrically linearly grooved, grooves dis- 

 tinct, equidistant. 



Venus pJiasianella, Deshayes, Pro. Zool. Soc. 1853, p. 2. 

 Dione phasianella, Deshayes. 



Hub. ? 



Characterized by a concentric sculpture of equidistant, 

 linear grooves, rather widely separated from each other. 



Species 57. (Mus. Cuming). 



Dione Afeicana. Dion, subelongato-ovali, poslice acii- 

 mhmlo-productd, fnlvescente-alhd, nigricante-griseo 

 concentrice irregnlariter undald, ItBvigald, margine 

 posiico dense corrngato-snlcato. 



The African Dione. Shell somewhat elongately oval, 

 acnminately produced on the posterior side, fulvous 

 white, concentrically irregularly waved with dark 

 grey, smooth, posterior margin densely wrinkle- 

 grooved. 



Cytlteren Africana, Philippi, MS. in Mus. Cuming. 

 Hub. Australia ? 



The posterior side of this shell is peculiar, not only in 

 being acnminately produced, but in being conspicuously 

 wrinkled along the margin with close-set grooves. 



Species 58. (Mus. Cuming.) 



Dione PALLESCENS. Dion, testa snbcordalo-ovatd, sor- 



dide alba, concentrice dense striata, striis numerosissi- 



luis, filiforndbus. 

 The pale Dione. Shell subcordately ovate, dull white, 



coiicenlrically densely striated, striaj very nmnerous 



and thread-like. 

 CgtJterea paUescens, Sowerby, Pro. Zool. Soc. 1835, p. 47. 



Dione pallescens, Deshayes. 

 Hub. Isle of Annaa ; Cuming. 



A shell of simple form, without any indication of 

 colour, sculptured with very numerous, fine, thread-like 

 stri*. 



Species 59. (Mus. Cuming.) 



Dione piperita. Dion, testa subelongato-oimtd, solidins- 

 cnld, fulmscente-lacled, punctis maculisqne Ideroghj- 

 phicis nigris promiscue aspersd, Immgatd, latere pos- 

 tico concentrice lineari-sulcato, sulcis cvquldistantibus. 



The peppered Dione. Shell somewhat elongately 

 ovate, rather solid, fulvous cream-colour, promiscu- 

 ously sprinkled with black dots and hieroglyphical 

 marks, smooth, posterior side concentrically linearly 

 grooved, grooves equidistant. 



Cytherea piperita, Sowerby, Thes. Conch, vol. i. p. 625. 

 pi. 136. f. 175. 

 Diane piperita, Deshayes. 



Ilab. Island of Burias, Philippines. 



Sprinkled in a very characteristic manner with black 

 dots and small hieroglyphic marks. 



Species 00. (Mus. Cuming.) 



Dione mULTIstriata. Dion, testd obhngo-omtd, solidd, 

 fnlco-spadiced, purpureo-cinereo radiatd, concentrice 

 irregnlariter rngose mnltistriatd. 

 The many-striated Dione. Shell oblong-ovate, solid. 



October, 1803. 



