446 
FIGURE. PAGE, 
24. Dreissensia polymorpha, Pallas. Europe, . 266 
25. Myalina lamellosa, Koninck. Carb.; Belgium, . 266 
26. Hoplomytilus crassus, Sandb. Devonian; Nassau, . 267 
27, 28. Modiolarca trapezina, Lam. Patagonia, : . 268 
29. Modiolarca ee Magellanica, Val. Pata- 
gonia, . : - : : : . 268 
30. Modiolopsis faba, Conr. Trenton Gr N; WY ork, 2 . 268 
31. Myoconcha crassa, Sowb. 4. L. Oolite; Gr. Britain, 268 
32. Myoconcha angulata, d’Orb. Cret.; Hur., : . 268 
PLATE 130. 
33. Amphiccelia Leidyi, Hall. Silurian; New York, eH i) 
34. Cheenocardia ovata, Meek and Worthen. Carb.; Ills.,. 269 
35. Aucella Mosquensis, Keyserl. U. Jura.; Russia, . 272 
36, 37. Limopsis Gyssei, Raine. Eocene; Paris Basin, 259 
38. Avicula ( Pseudoptera) anomala, Sowb. Cret.; Europe, 271 
39. Pteroperna costulata, Morris and Lycett. Oolite; 
me as . 272 
40, 4 Gassianella ory pheeata, Munster. Trias. ; ; Tyrol, . 272 
42, eer hae speluncaria, Munster. Permian ; Eur., 272 
3. Pterinea levis, Goldfuss. Devonian; Nassau, » 272 
44, Daonella Lommei, Wissm. Trias. ; Ty rol, and ‘Nevada, 
WSs, vote 
45. Monotis substriata, Munster. Lias ; Bavaria, te 
46. Posidonomya 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, Hale orn Silurian ; Cincin- 
- nati, O., 275 
50. Ambony chia (Anomalodonta) Casei, Meek and Wor- 
then. L. Silur.; Richmond, Ind., 275 
51. Mytilarca Chemungensis, Conr. Devonian ; N. ve 276 
52. Perna Mulleti, d’Orb. Cret.; Europe, : : ie 
3. Pulvinites Adansoni, Defrance. U. Cretaceous; Eur., 277 
54. Pernostrea Bachelieri, Munier-Chalmas. Jurassic; 
France, : : F 4 : ‘ : 2 . 278 
55. Inoceramus (Catillus) Lamarckii, Brongn. Cretaceous; 
Europe, ‘ : : ; , 5 279 
(Erroneously f. 56 in text.) 
56. Inoceramus concentricus, Sowb. Cretaceous; Eur., . 278 
(Erroneously f. 55 in text.) 
57. Inoceramus (Actinoceramus) suleatus, Parkinson. 4. 
Gault; England, . 219 
58. Inoceramus ‘(Volviceramus) involutus, Sowb. Creta- 
ceous; Europe, 279 
EXPLANATION OF PLATES. 
