251 



the lateral f which however are usually obsolete), short, thick, and 

 iicai'ly ecjuiaistaut. 



The varieties in colouring are too numerous to specify, the prin- 

 ci[)<il however, are are as follows ; violet, orange-red, white, yellow 

 or pinkish red, (either uniform, or rayed with, purple, the white 

 specimens with usually two lateral crimson internal spots) ; whitish 

 or yellowish with narrow interrupted violet rays often assuming the 

 appearance of arrow-heads ; violet, rayed with wliite ; whitish, with 

 broad fawn-coloured and narrower purplish rays. 



Britain, and West Indies. 



53. Tellina Lucinoides (pi. Ivi. f. 32.) Hanky, Zool. Proc. 

 1844. 



T. testa suborbicidari, tenui, subsequilaterah, subventricosa, im- 

 poHta, intus extusque alba, striis concentricis tenuissimis lineistjue 

 radiantibus minutissimis obsolete decussata, utrin(|ue rotundata; 

 margine ventrali arcuato ; dorsali utrinque convexiusculo et suljse- 

 quahter decHvi ; latere antico paululum longiore ; flexura costaque 

 umbonaH obsoletis ; Hgamento angustissimo, infosso ; dentibus la- 

 terahbus magnis, sequidistantibus. 



Suborbicular, thin, subequilateral, rather ventricose, dull, both 

 externally and internally wliite, with very dehcate concentric striae 

 and most minute radiating lineoles ; ventral margin strongly arcu- 

 ated ; extremities rounded ; dorsal edges nearly equally sloping and 

 slightly convex ; anterior side very slightly the longer ; umbonal 

 ridge and fold obsolete ; hgament very narrow, sunken ; lateral 

 teeth distinct, equidistant. 



Not imlike the shell which is figured without a name in the 

 292nd plate (f. 8.) of the Encyclopedic Methodique. 



Chain Island, South Seas. 



54. Tellina Nux (pi. Ivi. f. 33.) Uanley, Zool. Proc. 1844. 



T. testa obovali, subinsequivalvi, subsequilaterah, tenui, convexa 

 aut subventricosa, nitida, sublsevigata aut inferne concentrice sub- 

 striata, intus extusque albida, umbonibus hyalinis et fulvis ; mar- 

 gine ventrali subarcuato ; dorsaH utrinque convex o, satis et requahter 

 decHvi; extremitate postica obtusa, attenuata; ligamento angus- 

 tissimo, infosso ; natibus obtusis ; flexura distincta ; costa umbo- 

 naH subinconspicua ; dentibus laterahbus distinctis, antico paululmn 

 propinquiore. 



Oboval, tliin, slightly inequivalve, almost equilateral, from con- 

 vex to subventricose, rather glossy, wliitish both externally and 



