476 
APPENDIX. 
[B. 
There are two other specimens of this shell in the Museum which 
do not agree with any that Lamarck describes ; one of these being 
fourteen-tenths of an inch long, and one inch high, is double the 
size of Captain King's specimen ; its habitation is not marked, 
but the other specimen is from Ceylon. 
10. Cytherea Kingii, (n. s.) 
Testa ovato-cordata, tumida, alhiday concentrice substriata, 
radiata, radiis jlavicantihus ; lunula lanceolato-cordatd ; 
intus alhidd. 
Shell ovate, heart-shaped, white or pale brown, with darker brown 
rays, each formed of several narrow lines, the umbones white, the 
edge quite entire ; the lunule lanceolate heart-shaped, obscurely 
defined, the centre rather prominent ; inside white, the hinge margin 
rather broad. 
This shell is very like Cytherea IcBta, but differs from it in its 
markings, as well as its outline, which is more orbicular. The 
specimen given to the Museum by Captain King, is one inch long, 
and eight-tenths of an inch high ; but there is another specimen in 
the collection, from the Tankerville cabinet (No, 2S8), which is 
twice that size. 
11. Cytherea GiBBA. 
Cytherea Gibbia, Lam. Hist. v. 577. 
Icon. Chemn. vii. t. 39. f. 415. 416. 
12. Petricola rubra ? Cardium rubrum ? Montague. 
This shell agrees in general form, teeth, and colour, with the Car- 
dium rubrum of Montagu, but it is larger. It was found imbedded 
in the sea-weed and spongy-like substance that covers the TrU 
dacna squamosa. 
13. Cmama limbula, Lam. Hist. vi. 95. 
This shell may, perhaps, be a variety of Chama gryphoides. 
14. Tridacna Gig as, Lam. Hist. vi. pt. 1. 105. 
Chama Gigas, Gmel. Syst. Nat. i. 3299. 
Icon. Chemn. vii. t. 49. f. 495. Ency. Mcth. pi. 235. f. 1, 
