DIONE.— Plate XII. 



fulvous drab, rayed with purple-ash, concentrically 



irregularly roughly many-striated. 

 Cytherea muUMriata, Sowerby, Thes. Conch, vol. i. p. 



628.pl. 13fi. f. 177. 



Dione muUidriata, Deshayes. 

 Hab. New Zealand. 



Eather variable in character, but generally more or less 

 rayed with purple-ash upon a fulvous bay ground. 



Species 61. (Mus. Cuming.) 



Dione toktuosa. Dion, tudci mbaugude ohlique cor- 

 datd, solidd, eburned, ad iimbones fulvesceute tinctd, 

 latere antico breviiisculu, rotundato, postico flexuuse 

 attenuato-producto, concentriee obtuse comigato-lirald, 

 liris hie illic coiifluentibus. 



The twisted Dione. Shell rather narrowly obliquely 

 cordate, solid, ivory-wLite, tinged with fulvous at the 

 unil)oes, anterior side rather short, rounded, poste- 

 rior liexuously attenuately produced, concentrically 

 obtusely wrinkle-ridged, ridges here and there flow- 

 ing together. 



Cijtherea lortuosa, Broderip, Pro. Zool. Soc. 1835, p. 15. 

 Venus lortuosa, D'Orbigny. 

 Dione lortuosa, Deshayes. 



Hab. Xipixapi, Central America ; Cuming. 



The confluent ridges of this attenuately cordate species 

 and the interstices are of a uniform delicate ivorv-white. 



Species 62. (Fig. a, b, c, Mus. Cuming.) 



Dione pannosa. Dion, testa subtrif/ono-ovutd, soUdius- 

 cnld, falcd, violuceo-fusco varie radiatd, tinctd vet 

 reticulata, lavigatd, vet concentrice subruyoso-striatd, 

 sub lenle radiatim vdnutissiine striatd. 



The ragged Dione. Shell somewhat triangularly 

 ovate, rather solid, fulvous, variously stained, rayed, 

 or reticulated with violet-brown, smooth, or concen- 

 trically rather rougldy striated, beneath the lens 

 radiately very minutely striated. 



Cytherea pannosa, Sowerby, Pro. Zool. Soc. 1835, p. 17. 

 Cytherea lutea, Koch. 

 Venus pannosa, D'Orbigny. 

 Dione pannosa, Deshayes. 

 CaUista puella. Carpenter. 



Hab. Chili, Peru, Mazatlan. 



The colouiing of this species, though exti'emely vari- 

 able, is mostly disposed in irregular mottled reticulations, 

 more especially about the lunule and ligamentary area. 



