APPENDIX. 387 



Hyria avicidaris, p. 214, t. 24, f. 11. 



On Anodonta (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.), Montezuma (do.), Footiana (do.), 

 Dunlapiana (do.), Califomiensis (do. in vol. x.), tortilis (do.), deni- 

 grata (do.), oblita (do.), virens (do.), Linneana (do.), opaca (do.), 

 Wheatleyi (do.), Schrdteriana (do.), crepera (Lea in Z. P. 1850), 

 Cumingii (do.), subcrassa (do.), gracilis (do.), tenuis (do.), polita 

 (Mousson, Java), solidula (Deville and Huppe in Mag. Z.), PtteZ- 

 chana (D'Orb. S. Am.), lucida (do.). Examine, likewise, Ann. Nat. 

 H. 1842, Kuster's edition of Chemnitz, Chenu's 'Illustrations Con- 

 chyliologiques,' Proc. Bost. vol. 1, 2, 3, J. Conch, vol. 1, Morelet's 

 1 Testacea Novissima,' Sil. J. n. s. 6, and Middendorff's ' Zoologie' of 

 his ' Reise, &c. Sibiriens.' 



Anodonta Wahlamatensis, p. 215, t. 24, f. 13 ... A. latomarginata, 

 p. 221, t. 24, f. 14 ... A. Blainvilliana, p. 222, t. 24, f/l8 ... 

 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 Chama (p. 226). Consult Reeves monograph (Conch. Ic.) ; 

 see, likewise, Ann. Lye. N. York, 5, and Zeit. Mai. 1846. 



Chama pellucida, p. 228, t. 24, f. 19. 



Cleidotlimrus Chamoides, p. 228, t. 24, f. 20. 



Tridacna serrifera, p. 232, t. 24, f. 21. 



On Modiola (p. 232). At page 237 there is an important error. 

 The description of M. elongata has been attached to M. euneiformis, 

 erroneously alleged to have been published in the Z. P. 1844. The 

 description of M. elongata, 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. Mai. 1844, 

 1847, 1848, 1849, 1851, Moller's Mol. Groenl. and Middendorff's 

 Mai. Ros. 



Modiola Metcalfei, p. 235, t. 24, f. 25 ... M. Philippinarum, 

 p. 235, t. 24, f. 26 ... M. trapesina, p. 237, t. 24, f. 27 ... 

 M. (Lithodomus) cinnamonea, p. 238, t. 24, f. 24 ... M. (Litho- 

 domus) eanalifera, p. 239, t. 24, f. 22 ... M. plumida, p. 239, 

 t. 24, f. 23 ... M. elongata (as euneiformis, p. 237), t. 24, 



