446 EXPLANATION OF PLATES. 



24. Dreissensia polymorpha, Pallas. Europe, . . . 266 



25. Mj^alina lamellosa, Koninck. Carb. ; Belgium, . . 266 



26. Hoplomytilus crassus, Sandb. Devonian; Nassau, . 26Y 

 2*7, 28. Modiolarca trapezina, Lam. Patagonia, . . 268 



29. Modiolarca (Phaseolicama) Magellanica, Val. Pata- 



gonia, . ■ . . . 268 



30. Modiolopsis faba, Conr. Trenton Gr., N. York, . . 268 



31. Myoconcha crassa, Sowb. |. L. Oolite; Gr. Britain, '268 



32. Myoconcha angulata,d'Orb. Cret. ;Eur., , . . 268 



Plate 130. 



33. Amphicoelia Leidyi, Ball. Silurian; New York, . 275 



34. Chaenocardia ovata. Meek and Worthen. Garb.; Ills., . 269 



35. Aucella Mosquensis, Keyserl. TJ. Jura.; Russia, . 272 



36. 37. Limopsis Gyssei, Rainc. Eocene ; Paris Basin, . 259 



38. Avicula (^ Pseudoj^tera) anomala, Sowb. Cret.; Europe, 271 



39. Pteroperna costulata, Morris and Lycett. Oolite; 



England, 272 



40. 41, Cassianella grj^Dhseata, Munster. Trias.; Tyrol, . 272 



42. Pseudoraonotisspeluncaria, Munster. Permian; Eur., 272 



43. Pterinsea laeAns, Goldfuss. Devonian ; Nassau, . . 272 



44. Daonella Lommei, Wissm. Trias. ; Tyrol, and Nevada, 



TJ. S., . . 273 



45. Monotis substriata, Munster. Lias; Bavaria, . . 273 



46. Posidonomj^a Becheri, Bronn. Carboniferous ; Eng., . 274 



47. Rhynchopterus obesus. Meek. Triassic ; Nevada, . 274 



48. Monopteria gibbosa, Meek and Worthen. Carbonifer- 



ous ; Ills., 274 



49. Ambonychia bellistriata. Hall. L. Silurian ; Cincin- 



nati, 0., 275 



50. Ambonychia (Anomalodonta) Casei, Meek and Wor- 



then. L. Silur. ; Richmond, Ind., .... 275 



51. Mytilarca Chemungensis, Conr. Devonian ; N. Y., . 276 



52. Perna Mulleti, d'Orb. Cret.; Europe, . , .277 



53. Pulvinites Adansoni, Defrance. U. Cretaceous; Eur., 277 



54. Pernostrea Bachelieri, Munier-Chalmas. Jurassic ; 



France, . . ; 278 



55. Inoceramus (Catillus)Lamarckii,Brongn. Cretaceous; 



Europe, 279 



(Erroneously f. 56 in text.) 



56. Inoceramus concentricus, Sowb. Cretaceous; Eur., . 278 



(Erroneously f. 55 in text.) 



57. Inoceramus (Actinoceramus) sulcatus, Parkinson, f. 



Gault; England, 279 



58. Inoceramus ( Yolviceramus) involutus, Sowb. Creta- 



ceous; Europe, . 279 



