132 



INDEX. 



Laevicardium, 97. 

 Lamellibranchiata (Carbonif.) 



27. 

 Lamellibranchiata (Permian 



Period), 48. 

 Lamellibranchiata (Jurassic), 



72 



Lamprostoma, 108. 

 Lampsilis, 91. 

 Lanceolaria, 91. 

 Larina, 114. 



Carditamera, 34. 

 Leiorhynchus, 70. 

 Leptasna, 23. 

 Leptodomus. 

 fragilis, 39. 

 topekaensis, 40. 

 truncatus, 40. 

 granosus, 40. 

 Limnsridse, 105. 

 Limnseinse, 105. 

 Limninm, 92. 



Limnophila (Jurassic), 105. 

 Limnostracitis, 72. 

 Limopsis, 88. 

 Lingula, 68. 



anatina, 2, 68. 

 brevirostris, 69. 

 Beanii, 69. 

 cuneata, 2. 

 prima, 3. 

 Lingulepis, 69. 

 Lingulepis, 1. 

 dakotensis, 3. 

 pinniformis, 2. 

 prima, 3. 



Lingulidse (Jurassic), 68. 

 Lingulidse, 1. 

 Liocardium, 97. 

 Liopistha, 97. 

 Lioplacodes, 115. 

 veternus, 116. 

 Lioplax, 114, 115. 

 Lirodon, 87. 

 Lissees, Les, 3. 

 Litharca, 88. 

 Lithocardium, 97. 

 Lithophaginee, 84. 

 Lithophagus, 84. 

 Lituitis, 64. 

 Lopha, 72. 

 Lunarca, 88. 



I Lutetia, 34. 

 Lyogyrus, 112. 

 Lyonsia, 36. 



concava, 41. 

 Lyrodon, 82. 



M. 



Macrodon, 88. 

 Macrodontinse, 88. 

 Macrodontinse (Jurassic), 89. 

 Macrophysa, 105. 

 Mactrina, 93. 

 Mactromya, 36. 

 Maldia, 60. 

 Malletia, 60. 

 Malletinse, 60. 

 Margarita, 92. 

 Margaritana, 91. 

 Margaritaria, 36, 104. 

 Margaritifera, 28, 79. 

 Margaron, 91. 

 Martinia, 16, 17. 

 Martinia, 19. 

 Matheria, 34. 

 Megalodon, 34. 

 Megalomus, 88. 

 Megambonia, 28, 88. 

 Melania, 115, 116. 

 amarula, 116. 

 veterna, 115. 

 Melaniidse, 118. 

 Melantho, 113. 

 Melininse, 28. 

 Meekia, 96. 

 Menetus, 107. 

 Menetus, 106. 

 Merista, 16. 

 Meristella (Goniocoelia) unisul- 



cata, 16. 

 Metaptera, 91. 

 Micromya, 91. 

 Modiola, 85. 



cancellata, 87. 

 formosa, 86. 

 Meekii, 86. 

 minuta, 86. 

 Wyomingensis, 52. 

 Modiolopsis, 85. 

 Modiolus, 85. 

 Mollusca (Carboniferous Age), 



16. 

 Mollusca (Jurassic), 68. 



Mollusca (Permian Period), 48. 

 Mollusca (Potsdam Period), 1. 

 Monocoudyllsea, 91. 

 Monodacna, 97. 

 Monodontina, 91. 

 Monotis, 53. 

 Hawni, 54, 

 interlsevigata, 79. 

 salinaria, 53, 54. 

 substriata, 81. 

 Multicostatae, 103. 

 Munsteria, 118. 

 Murchisonia, 45. 

 Mya, 42. 



dilatata, 43, 44. 

 pectorum, 92. 

 pubescens, 101. 

 Myacites, 99. 

 Myacites, 36. 



Albertii, 100. 

 elongatus, 100. 

 mactroides, 100. 

 musculoides, 100. 

 nebrascensis, 100. 

 obtusus, 100. 

 radiatus, 100. 

 subellipticus, 101. 

 ventricosus, 100. 

 Myalina, 30. 



angulata, 30, 31. 

 aviculoides, 51. 

 lamellosa, 30. 

 perattenuata, 30. 

 perattenuata, 32. 

 permiana, 52. 

 subquadrata, 32. 

 Mycetopus, 91. 

 Mycinodon, 34. 

 Myoconcha, 34. 

 Myodora, 36. 

 Myophoria, 57. 

 Myopsis, 99. 

 Myrina, 84. 

 Mytilidae, 84. 

 Mytilimeria, 36. 

 Mytilus, 84, 85. 

 cancellatus, 87. 

 (Myalina) concavus, 52. 

 hirundo, 79. 

 modiolus, 85. 

 partcnus, 86. 







