New Species of Anatina. 99 
ANATINA BREVIS. 
Tas. Supp. xurm. f. 1, 2. 
A. testé plano-converd, sub-triangulari, transversim striatd, valvd dex- 
ird convexd, costis duabus depressis, transversim lamellosis, supra 
extremitatem posticam positis ; valvd alterd subconcavd, margine 
dorsali inflexo et in sulcwm alterius valve inserto: cardine cartila- 
gine internd trigond et appendice testaced intermedia : umbonibus 
postice reflexis: impressionibus muscularibus distantibus, laterali- 
bus: impressione pallii sinu lunari; long. +8, lat. #5, alt. $$. 
Shell plano-convex, subtriangular, transversely striated. Right valve 
conyex, with two depressed transversely lamellated ribs upon the posterior 
extremity. Left valve slightly concave, dorsal margin inflected, and in- 
serted into asulcus in the opposite valve. Hinge with an internal trian- 
gular cartilage, and a supervening small shelly piece. Umbo reflected 
posteriorly.* Two distant muscular impressions ; a lunate sinus in the 
impression of the mantle. 
A figure of this shell was given by Mr. G. B’ Sowerby, in his Appen- 
dix to my Sale Catalogue as Pandora brevis, the cardinal appendage 
being overlooked by him, or (which is more probable) it was lost before 
he had the shell. 
ANATINA PANDORIFORMIS. 
Tas. Supp. xuitt. f. 3, 4. 
A. testé plano-converd, subovatd, striis transversis distantibus ; valvd 
dextré convexd, extremitate posticd carinatd truncatd ; valvd alterd 
subconcavd : cardine appendice pland fossulis cardinalibus cartila- 
gine adherente; lined depressd subobsoletd, internd, ab umbone 
' versus marginem inferiorem oblique decurrente ; long. 3%, lat. 5, 
alt. zy. : 
Shell plano-convex, subovate, with transverse distant strie. Right 
valve convex, the posterior extremity carinated and truncated ; left valve 
slightly concave. Hinge with a flat testaceous piece attached by cartilage 
* Contrary to every other genus examined, applying the term posterior to 
the side where the siphons are situated. 
a 2 
