162 



Index Tęst. Sup. t. 16. f. 21. Long. 120 ; lat. 1-40 poli. 



Hab. Gulf of Guinea (Rang). Mus. Hanley, Cuming. 



In contour, colouring and general sculpture this rare shell ap- 

 proaches the cincta of Chemnitz (f. 387), but whilst that species is 

 girt with but a few broad belts, ours is adorned with at least forty. 

 It is sometimes called V. cingulata of Lamarck, but not only is the 

 expression " annulis creuatis" utterly at variance with its character- 

 istics, but an examination also of the typical specimens of the Jardin 

 des Plantes has proved to me its complete distinctness from that 

 species. Its teeth are those of the section Dosina. 



Venus decipiens. Ven. testd parvd, rotundato-subtrigond, com- 

 pressd, inceguilaterali, solidd, pallide fulvd, radiis latis rufo- 

 bnmneis variegatd, concentrice costatd ; costis glabris, subremotis, 

 depressis, postice sublamellosis , et supra pubem impressam por- 

 rectis ; interstitiis subconcavis, Icsvibus ; margine ventrali subar- 

 cuato, intusque subcrenato ; dorsali, utringue declivi, postice con- 

 vexo, antice brevi, subrecto ; lunuld lanceolatd ; Ugamento angus- 

 tissimo, infosso. 

 Index Tęst. Sup. t. 16. f. 22. Long. 0-75 ; lat. 090. 

 Hab. Australia ? Mus. Hanley, Cuming. 



So extremely likę the young of fasciata as with difficulty to be 

 distinguished. Its form, however, is proportionably broader between 

 the lateral extremities, the valves are much more compressed, and 

 the interstitial spaces decidedly broader. The hinder terminations 

 of the lamellar ribs, whlch project beyond the escutcheon in com- 

 pressed tubercles, do not appear to become obsolete by age, as in 

 fasciata, 



Amphidesma carnicolor. Amph. testd suborbiculari, convexd aut 

 subventricosd, subtenui, subcequilaterali, albido-rosed aut carned, 

 undigue concentrice lamellatd ; lamelUs multis, membranaceis, ad 

 margines earum serratis ; interstitiis rugis radiantibus minutis, 

 confertissime ornatd ; margine ventrali rotundato, intusąue integro ; 

 dorsali, utrincue brevi, subrecto et sub(Bqualiter declivi ; pube im- 

 pressd; superficie internd aurantid. 



Index Tęst. Sup. t. 12. f. 28. Long. 1 ; lat. 1 poli. 



Hab. Philippines. Mus. Cuming, Hanley. 



Exquisitely sculptured, but so minutely as to baffle the unassisted 

 eye. 



