474 
APPENDIX. 
[B. 
MOLLUSCA, 
By JOHN EDWARD GUAY, Esq., F.G.S, 
I. CONCHOPHORA/ 
1. S0LEN03IYA Australis. 
Soleraya Australis, Lam. Hist. v. 489. 
Mya marg'inipectinata, Peron and Lesueur. 
2. Mactra abbreviata ? Lam. Hist. v. 477. n, 20. 
Icon. 
This collection contains a considerable number of specimens of a 
shell ag'reeing with the short specific character given by Lamarck 
of the above ; but as it has not been figured, I have referred to it 
with a mark of doubt. The shells are rather solid, white, or white 
variegated with purple, with numerous concentric wrinkles, which 
are more distinct nearer the margin ; the umbones, covered with a 
thin pale periostraca, nearly smooth and polished, with a small 
purple spot, the inside white, with the disk and posterior slope 
purple ; the anterior and posterior slopes distinct, the lunule and 
escutcheon deeply and distinctly sulcated ; length fourteen-tenths 
of an inch ; height one inch. 
3. Mactra ovalina, Lam. Hist. v. 477. 
This shell is nearly of the same, shape as the last, but the anterior 
slope is rounded and circumscribed, and the posterior only marked 
by a raised line in the periostraca. The shell is thin, white ; with 
a pale brown and deeply grooved escutcheon. 
4. SoLEN TRUNCATus, TFood. Conch. 
Solen Ceylonensis, Leach, Zool. Misc. i. 22. tab. 7. 
Solen vagina, b. Lam. Hist. v. 451. 
Icon, fVood, Conch, t, 26. f. 3. 4. Ency. Method, t. 222. f. 1, 
