EXPLANATION OF PLATES: 121 
¥IG. 
144 Hyria Syrmatophora, Sow. Prisodon, Schum. Diplodon, 
Spix. 
145 Bae littoralis, Lam. Mysca ovata, Turt. 
147 Unio Alatus; Symphynota, Lea. 
148 Atratus, Lam. Naia, Sw. 
149 Monocondylza Paraguayana. 
150 Iridina elongata; Pleiodon, Conrad .« | Platini L 
151 Mycetopus solenoides, D’Orb. PEE, Lea. ea ais 
152 Anodon Cataractus. 
Fam. Cha macea 
153 Chama Lazarus. 
154 Diceras perversum, (from Sowerby’s Genera.) 
155 Etheria semilunata. 
Order, MonoMyaRIA. 
Fam. Tridacnacea. 
156 Hippopus maculatus. 
157 Tridacna elongata. 
Fam. Mytilacea. 
158 Mytilus achatinus. 
159 polymorphus; Gen. Dreissina. 
160 Modiola Tulipa. 
161 Lithodomus Dactylus. 
162 Pinna saccata. 
Fam. Malleacea. 
163 Avicula Hirundo. 
164 margaritifera, Meleagrina, Lam. 
.165 Malleus Vulgaris. 
166 Perna ephippium. 
167 Catillus Lamarkii; Inoceramus, Sow, (from Blainv. ) 
168 Crenatula mytiloides, 
169 Gervillia aviculoides, } (from Sowerby’s Genera. ) 
170 Pulvinites megaeeie. 
Fam. Pectinides. 
171 Pecten varius. 
172 Plica; Decatopecten, Riippel. 
173 Hinnites pusio. Pecten pusio, Lam. 
174 Lima squamosa. 
175 Dianchora striata, (from Sow. Min. Con.) 
176 Plagiostoma spinosum, (from Sow. Min. Con.) 
177 Spondylus Americanus, hinge, (See Frontispiece.) 
178 Plicatula gibbosa. 
R 
