Report of the State Geologist. 



385 



LAMELLIBRANCHIATA. 



List of Genera Illustrated on the Plates of the Report of the 

 State Gteologist for 1882, Prepared by Mr. C. E. Beecher. 



1. Pernopecten. 



2. Crenipecten. 



3. Euchondria. 



4. Pterinopecten. 



5. Aviculopecten. 



6. Lyriopecten, 



7. Pterinea. 



8. Limoptera. 



9. Ectenodesma. 



10. Actinopteria. 



11. Ptychopteria. 



12. Glyptodesma. 



13. Leiopteria. 



14. Leptodesma. 



15. Pteronites. 



16. Gosselettia. 



17. Mytilarca. 



18. s. g. Plethomytilus. 



19. Modiola, s. g., Mytilops. 



20. Palseopinna. 



21. Byssopteria. 



22. Microdon. 



23. Modiomorpha. 



24. Goniophora. 



25. Sphenotus. 



26. Leda. 



27. Nucula. 



28. Nuculites. 



29. Palseoneilo. 



30. Ptychodesma. 



31. Macrodon. 



32. Nyassa. 



33. Dystactella. 



34. Schizodus. 



35. Cytherodon. 



36. Conocardium. 



37. Paracyclas. 



38. Megambonia. 



39. Solemya. 



40. Amnigenia. 



41. Megalomus. 



42. Lunulicardium. 



43. Panenka. 



44. Glyptocardia. 



45. Eutliydesma. 



46. Grammysia. 



47. (Sphenomya.) 



48. (Leptodomus.) 



49. Modiella. 



50. Palseanatina. 



51. Prorhynchus. 



52. Prothyris. 



53. Tellinopsis. 



54. Cypricardinia. 



55. Orthonota. 



56. Palaeosolen. 



57. Phthonia. 



58. Pholadella. 



59 . Cimitaria. ' 



List of Genera not Illustrated on the Plates of the Geologist's 

 Report of 1882, together with the Author's Name and References 

 TO THE Earliest Publication of the Same. 



1. Entolium, Meek. Geol. of California, vol. 1, app. B, p. 478. Jurassic. 



2. Streblopteria, McCoy, Am. Mag. Nat, Hist., 2d ser., vol. 7,- for figure, 



see Syn. Carb. Foss., Ireland, pi. 12, fig. 5. 



3. Vertmnnia, s. g.. Hall. Pal. N. Y., vol. v., pt. ii., pi. 24, fig. 12. Vertumnia 



mns. 



4. Avicula, Klein, 1753. Ostrese. 



5. Actinodesma, Sandberger. Nassau, PL 29, figs. 17, 17a. A. malleiforme. 



Sand. 



6. Pteronitella, Billings. Pal. Poss, vol. 2, 1874. PL 9, fig. 5. 



49 



