oo ~ 
10. 
a¢ 
oo le pee 
Ss = Ve pes iles 
TRIGONACEA. 55 
. serotina, Hinds, Pro. Zool. Soc. 1844. 
. striata, Sowerby, Conch. Illus. no. 21. f. 16. 
- Tellinoides, Sowerby, Genera, no. 17. f. 2. 
Arca Tellinoides, Wood. 
. tenella, Hinds, Pro. Zool. Soc. 1844. 
. tenuis, Turton, Brit. Biv. p. 177. 
Arca tenuis, Montagu. 
- throceformis, Storer, Boston Journ. v.2; Gould, Mass. f. 66. 
. tumida, Hinds, Pro. Zool. Soc. 1844. 
- ventricosa, Hinds, Pro. Zool. Soc. 1844. 
Famity XI. TRIGONACEA. 
Genus I. TRIGONIA, Bruguiére. 
- pectinata, Lamarck, Ann. du Mus. v. 4. p. 355. pl. 67. 
Trigonia margaritacea, Lamarck ; 
Chama pectinata, Wood. 
Famizty XII. NAIADES. 
Genus I. UNIO, Bruguiére. 
- acutissimus, Zea, Trans. Amer. Phil. Soc. v. 4. pl. 10. f. 18. 
. Esopus, Green, Cont. of Mac. Ly. 1827. pl. 3. 
Unio cicatricosus, Conrad ; Unio varicosus, Conrad. 
. alatus, Say, Lea, Obs. Unio. p.62 ; Sowerby, Genera, f. 5. 
Mya alata, Wood ; Symphynota alata, Lea. 
. altilis, Conrad, Freshwater Shells, p. 43. pl. 2. f. 1. 
. ambiguus, Lea, Sowerby, Genera, pl. 1. f. 2. 
Castalia ambigua, Lamarck; Mya ambigua, Wood; 
Tetraplodon pectinatum, Spix. 
. angustatus, Lea, Trans. Amer. Phil. Soc. v. 4. pl. 17. f. 43. 
. angustus, Lamarck, Lister’s Conch. pl. 147. f. 3. 
. Anodontoides, Zea, Trans. Amer. Phil. Soc. v. 4. pl. 8. f. 11. 
Unio teres, Conrad. 
. apiculatus, Say, Amer. Conch. pl. 52. 
. Arceformis, Zea, Trans. Amer. Phil. Soc. v. 4. pl. 17. f. 44. 
Unio nexus, Say. 
