ADDITIONS AND CORRECTIONS 549 
cosa, Gld. Mer. & Cal. Shells, p. 17.” | 
Species 80. Add “Comp. Mulinia donaciformis, Gray, in Jag. 
Nat. Hist. N.S. vol. i. p.376:—Zool. Beech. Voy. p. 164, 
pl. 44, f. 13, ‘from Nevis.’” 
Species 81 should be “Gnatnopon meENpicus, Gld. Mactra 
mendica, Gid. in Proc. Bost. Nat. Hist. Soc. 1851, p. 88 :— 
Mex. § Cal. Shells, p. 20, pl. 15, f. 4.” 
Species 85. Add as synonym, ‘“=Cytherea equilatera, Desh. in 
Rev. Cuv. 1839, p. 358:—Mag. Zool. Guér. pl. 22 :—(Tri- 
gona x.) B. M. Cat. Ven. p.50, no. 17. San Blas.” Zo tablet 
246 add ‘‘also a smaller sp. with its velvety epidermis.” 
To tablet 258 add “also an intermediate sp. with the ribs 
interrupted.” 
Page 66, line 15, add “‘pl. 9, f. 1, 2.” 
» 67, line 24, add “a, b, as of Lesson.” 
», 40, line 11, add “Chén. Conch. Til. pl. 1, f. 4, 4a, 4 6.” 
», 12, line 10 from bottom, dele the reference. 
» 179, line 6 from bottom, for ***6,” read ‘“*06.” 
Page 80, after line 17, add “? = Venus succincta, Val. Rec, Obs. 
vol. ii. p. 219, pl. 48, f. 1, a, b, ec. Acapulco.” 
Page 82. In tablet 413, for “2 minute valves,” read “£1 minute 
valve”’.—The Genus Gouldia (teste Gould) is an Astarte with 
lateral teeth, as supposed. The West Indian Crassatella 
Guadalupensis, D’Orb. is the exact analogue of Gouldia 
Pacifica: his Cr. Martinicensis is intermediate between that 
species and G. varians. 
To tablet 420 is added a minute pair measuring ‘018 by ‘O15. 
Page 87, line 8, for “f.57” read “f.5-7.” Add to synonyms, 
“Chama frondosa, Chén. Conch. Ill. pl. 6, f£.8: (var. Mexi- 
cana) f. 7. (Do. jun. as Ch. echinata, Brod; apparently 
copied from the Transactions) pl. 6, f. 6.” The true Ch. 
echinata appears to be figured as Ch. Delessertii, pl. 6, f. 4. 
Page 90, line 11, for “ Hipponyx tessellata,” read ‘‘ H. serratus.’ 
», 102, before line 5, insert ““Famity DIPLODONTID.%.” 
Page 103, line 4 from bottom, for *‘Grnus ———,” read “Sus- 
aEnvus Fenanta, ftéecl., H. § A. Ad. Gen. vol. ii. p. 473.” 
Species 154, add to synonyms “Comp. Poronia Petitiana, Chén, 
Conch. Lil. p. 2, pl. 1, f. 2. Callao (Petit), not rare.” 
