251 



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

 nearly equidistant. 



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

 cipal however, are are as follows ; violet, orange-red, white, yellow 

 or pinkish red, (cither 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 white ; whitish, with 

 broad fawn-coloured and narrower purplish rays. 



Britain, and West Indies. 



53. Tellina Lucinoides (pi. lvi. f. 32.) Hanley, Zool. Proc. 

 1844. 



T. testS, suborbiculari, tenui, subsequilaterali, subventrieosa, im- 

 polita, intus extusque alba, striis concentricis tenuissimis lineisque 

 radiantibus minutissimis obsolete decussata, utrinque rotundata; 

 margins ventrali arcuato ; . dorsali utrinque convexiuscido et subae- 

 qualiter declivi ; latere antico paululum longiore ; flexura costaque 

 umbonali obsoletis ; hgamento angustissimo, infosso ; dentibus la- 

 terahbus magnis, sequidistantibus. 



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

 externally and internally white, with very delicate concentric stria? 

 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 unlike 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. lvi. f. 33.) Hanley, Zool. Proc. 1844. 



T. testa obovali, subinasquivalvi, suba3quilaterali, tenui, convexa 

 aut subventrieosa, nitida, sublsevigata aut inferne concentric^ sub- 

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

 gine ventrali subarcuato ; dorsali utrinque convexo, satis et sequaliter 

 declivi; extremitate postica, obtusa, attenuata; Hgamento angus- 

 tissimo, iidosso ; natibns obtusis ; flexura distincta; costa umbo- 

 nali subinconspicua ; dentibus lateralibus distinctis, antico paululum 

 propinquiore. 



Oboval, tlun, slightly incquivalvc, abnost equilateral, from con- 

 vex to sub ventricose, rather glossy, whitish both externally and 



