23 



47 Unio Arctatus, p. 207 



48 — Monodontus, p. 210 



49 — Tetralasmus, p. 198 



50 — Declivis, p. 200 



51 — Apiculatus, p. 1 78 



52 — Confragosus, p. 210 



53 — Platyrrhinchus, p. 205 



54 — Crassissimus, p. 209 



55 — Leeai, p. 182 



56 — Spinosus, p. 182 



57 — Childreni, p. 193 



58 -— Smithii, p. 195 



59 — BoneUii, p. 212 



60 — Delphinulus of More- 



let, APP. 



PLATE XXIV. 



1 Unio Foliatus, p. 176 



2 — Haysianus, p. 188 



3 — Hembeli, app. 



4 — Cucumoides, app. 



5 — Grayanus, p. 177 



6 — Greenii, p. 191 



7 — » iEsopus, p. 181 



8 — Ventricosus, p. 189 



9 — Amsenus, app. 



10 — Curreyanus, app. 



11 Hyria Avicularis, p. 214 



12 Castalia Inflata, p. 173 



13 Anodonta Wahlamatensis, 



p. 215 



14 Latomarginata, 



p. 221 



15 

 16 

 17 



18 



223 



— Angulata, p. 222 



— Sinuata, p. 224 



— Ensiformis, p. 



— Blainvilleana, p. 

 222 



19 Chama Pellucida, p. 828 



20 Cleidothserus Chamoides, p. 



228 



21 Tridacna Serrifera, p. 232 



22 Modiola (Lithodomus) Ca- 



ll alifera, p. 239 



23 (Lithodomus) Plu- 



mula, p. 239 



(Lithodomus) Cin- 



24 



25 



26 



namonea, p. 238 



Metcalfei, p. 235 



Philippinarum, p. 



235 



27 - 

 38 - 



29 

 30 



Trapesina, p. 237 



Elongata(asCunei- 



formis), p. 237 



Striatula, p. 241 



Subramosa, p. 241 



31 Mytilus (Dreissena) Leuco- 



phaeatus, p. 251 



32 Hirsutus, p. 244 



