2175 

 2176 



Class II.-PELECYPODA. 

 Order I. Tetrabranchia. 



Sub- Order I.Mytilaeea. 

 Fain. Mytilidce. 



Dreissena, Van Beneden. 



polymorpha, Pallas, 

 cochleata, Kickx. 



Sub- Order Il.Submytilacea. 



Fam. Unionidw. 

 Unio, Retzius. 



Unio, Retzius. continued. 



2185 ater, Nills. 



2186 I intermedius, Rossm. 



2187 2 consentaneus, Zieg. 



2188 reniformis, Schm. 



2189 batavus, Nills. 



2190 I riparius, C. Pfr. 



2191 2 rivularis, Rossm. 



2192 3 amnicus, Zieg. 



2193 4 nanus, Lamk. 



2194 5 carinthiacus, Zieg. 



2195 6 piscinalis, Zieg. 



2196 7 parvidens. 



2197 8 pusillus, Rossm. 



2198 9 gangrenosus, Zieg. 



2199 decurvatus, Rossm. 



2 200 I atrovirens, Schm. 

 2 20 1 subtilis, Drouet. 



2202 durieui, Desh. 



2203 mingrelicus, Drouet. 



2204 sieversi, Drouet. 



2205 aegyptiacus, Call. 



2206 byzantinus, Parr. 



2207 vescoi, Bourg. 



2208 desectus, Drouet. 



2209 vicarius, West. 



2210 moquinianus, Dup. 



22 1 1 capigliolo, Parr. 



2212 I bandinii, Kstr. 



2213 sandrii, Villa. 



2214 I sericatus, Rossm. 



2215 2 truncatulus, Drouet. 



2216 elongatulus, Miihlf. 



2217 I ceratinus, Drouet. 



2218 2 dalmaticus, Drouet. 



2219 pictorum, Lin. 



2220 limosus, Nills. 



2221 ponderosus, Spitz. 



2222 longirostris, Zieg. 



2223 graniger, Zieg. 



2224 platyrhynchus, Rossm. 



2225 rostratus, Mich. 



2226 requienii, Mich. 



2227 rousi, Dup. 



2228 aleroni, Comp. 



2229 ardusianus, Reyn. 



2230 robustus, Villa. 



2231 spinelli, Villa. 



2232 lawleyanus, Gentil. 



2233 aradae, Phil. 



