APPENDIX. xvii 



40. Concretions in sand, Nantucket. 



— 41. Zoophyte (?) in conglomerate, Gay Head. 



42. Fossil crab. Gay Head. (Plate 19, figure 19.) 

 -~43. Fossil crab. Gay Head. 



44. Fossil crab, Gay Head. 



45. Shark's tooth, Gay Head. 



46. Shark's tooth, Gay Head. (Plate 19, figure 10.) 



47. Shark's tooth. Gay Head. (Plate 19, figure 12.) 



48. Crocodile's tooth (?), sillcified, Gay Head. (Plate 19, figure 13.) 



49. Vertebra (mineralized,) Gay Head. 



50. Vertebra, Gay Head. (Plate 19, figure 7.) 



51. Vertebra, Gay Head. (Plate 19, figure 6.) 

 -« 52. Vertebra, (mineralized,) Gay Head. 



-- 53. Vertebra, Gay Head. 



54. Fragment of a rib. Gay Head. 



55. Fragments of bones, Gay Head. 



56. Fragments of bones. Gay Head. 

 ■ 57. Bones with lignite. Gay Head. 



58. Bones with lignite in conglomerate. Gay Head. 



59. Bones with lignite in conglomerate, Gay Head. 



V 60. Bones in conglomerate. Gay Head. 

 -^ 61. Perforated bone, Gay Head. 



62. Iron pyrites, Gay Head. 



-63. Pisiform hematite, Gay Head. 



64. Mammillary hematite. Gay Head. 



— 65. Nodule of hematite perforated by lignite, Gay Head. 



66. Nodular hematite. Gay Head. 



67. Nodule of hematite perforated by lignite, Gay Head. 



68. Columnar clayey iron, Gay Head. 



69. Columnar clayey iron. Gay Head. 



70. Columnar clayey iron, Gay Head. 

 -71. Compact clayey iron. Gay Head. 



—72. Compact clayey iron, Gay Head. 

 —73. Slaty clayey iron. Gay Head. 

 «V74. Ferruginous sandstone. Gay Head. 



— 75. Selenite with lignite in clay, Gay Head, 

 x/" 76. AVhite clay, Kingston. 



V77. Ferruginous conglomerate, Marshfield. 



>^78. Concretion in green sand, Marshfield. 



79. Fossil shell. Gay Head. 



80. Fossil shell. Gay Head. 



81. Fossil shell. Gay Head. 



82. Fossil shell, Marshfield. 

 \/ 83. Fossil shell, Marshfield. 



^• 84. Fossil shell, Marshfield. 



V 85. Lignite, Gay Head. 

 ^ 86. Lignite, Gay Head. 



3 



