APPENDIX. 387 
Hyria avicularis, p. 214, t. 24, f. 11. 
On Awnoponta (p. 215). Lea, in his third edition of the 
‘ Naiades,’ has added the following species: A. argentea (Lea, Am. 
Ph. Tr. vol. 8), ferruginea (do.), Harpethensis (do.), Couperiana (do.), 
globosa (do.), Maryattana (do.), Montezume@ (do.), Footiana (do.), 
Dunlapiana (do.), Californiensis (do. in vol. x.), tortilis (do.), deni- 
grata (do.), oblita (do.), virens (do.), Linneana (do.), opaca (do.), 
Wheatleyi (do.), Schréteriana (do.), crepera (Lea in Z. P. 1850), 
Cumingti (do.), subcrassa (do.), gracilis (do.), tenuis (do.), polita 
(Mousson, Java), solidula (Deville and Huppé in Mag. Z.), Puel- 
chana (D’Orb. 8. Am.), lucida (do.). Examine, likewise, Ann. Nat. 
H. 1842, Kuster’s edition of Chemnitz, Chenu’s ‘ Illustrations Con- 
chyhologiques,’ Proc. Bost. vol. 1, 2, 3, J. Conch. vol. 1, Morelet’s 
‘Testacea Novissima,’ Sil. J. n. s. 6, and Middendorff’s ‘ Zoologie’ of 
his ‘ Reise, &c. Sibiriens.’ 
Anodonta Wahlamatensis, p. 215, t. 24, f.18 ... A. latomarginata, 
p- 221, t. 24, f. 14 ... A. Blainvilliana, p. 222, t.24, £18 ... 
A. angulata, p. 222, t. 24, f.15 ... A. ensiformis, p. 223, t. 24, 
f. 17 ... A. sinuata, p. 224, t. 24, f. 16. 
On Cuama (p. 226). Consult Reeve’s monograph (Conch. Ic.) ; 
see, likewise, Ann. Lye. N. York, 5, and Zeit. Mal. 1846. 
Chama pellucida, p. 228, t. 24, f. 19. 
Cleidotharus Chamoides, p. 228, t. 24, f. 20. 
Tridacna serrifera, p. 232, t. 24, f. 21. 
On Mopiotra (p. 232). At page 237 there is an important error. 
The description of M. elongata has been attached to M. cuneiformis, 
erroneously alleged to have been published in the Z. P. 1844. The 
description of M. elonyata, on the contrary, was drawn up from a 
new species (at least it was so in 1843—I know no name for it even 
now—when that part of the book was printed) from the Gambia. 
The error having been detected by the author, the M. euneiformis was 
not inserted in the Zoological Proceedings. The synonym of “ Gould 
Mas.” should be omitted from M. discrepans (p. 242); his species is 
certainly distinct from our British one. Numerous additional species 
have appeared during the last few years. Consult Proc. Philad. 3, 
Krauss’s Sud-Af. Mol., D’Orb. S. Am. and Cuba Shells, Proc. 
Bost. 3, 4, Ph. Sic. 2 (and his ‘ Abbildungen’), the Zeit. Mal. 1844, 
1847, 1848, 1849, 1851, Moller’s Mol. Groen]. and Middendorff’s 
Mal. Ros. 
Modiola Metealfei, p, 235, t. 24, f. 25 .... M. Philippinarum, 
p- 295, t. 24, f. 26 ... M. trapesina, p. 237, t. 24, f. 27 ... 
M. (Lithodomus) cinnamonea, p. 288, t. 24, f. 24 ... M. (Litho- 
domus) canalifera, p. 239, t. 24, f. 22 ... M. plumula, p. 239, 
t. 24, f. 23... M. elongata (as cuneiformis, p, 237), t. 24, 
