xii APPENDIX. 



143. Claystone concretions, Amherst. 



144. Claystone concretions, Amherst. 



Vl45. Claystone concretion, Hadley. (Plate 15, figure 18.) 



146. Claystone concretion, Hadley. 



Form of a prolate Sphei-oid. 



147. Claystone concretion, Montague. 

 v/ 148. Claystone concretion, Montague. 



vl49. Claystone concretion, Montague. 



V 150. Claystone concretion, Montague. 



^151. Claystone concretion, Sunderland bridge. 



V 152. Claystone concretion, Sunderland bridge. 

 153. Claystone concretion, Sunderland bridge. 



' 154. Claystone concretion, Sunderland bridge. 



V 155. Claystone concretion, Sunderland bridge. 

 ^/156. Claystone concretion, Sunderland bridge. 



W 157. Claystone concretion, Sunderland bridge. 

 vl58. Claystone concretion, Sunderland bridge. 

 vi59. Claystone concretion, Sunderland bridge. 

 */160. Claystone concretion, Sunderland bridge. 

 n/161. Claystone concretion, Sunderland bridge. 

 vl62. Claystone concretion, Sunderland bridge. 

 Vl63. Claystone concretion, Sunderland bridge. 

 \/l64. Claystone concretion, Sunderland bridge. 

 \/l65. Claystone concretion, Sunderland bridge. 

 Vl66. Claystone concretion, Hadley. 

 / 167. Claystone concretion, Hadley. 

 vl68. Claystone coacretion, Hadley. 

 ./ 169. Claystone concretion, Hadley. 

 y'170. Claystone concretion, Hadley. 

 ^ 171. Claystone concretion, Wethersfield, Connecticut. 

 v''l72. Claystone concretion, Wethersfield, Connecticut. 

 ■^173. Claystone concretion, Wethersfield, Connecticut. 

 "^174. Claystone concretion, Wethersfield, Connecticut. 

 v475. Claystone concretion, Wethersfield, Connecticut. 

 V176. Claystone concretion, Wethersfield, Connecticut. 

 Vl77. Claystone concretion, Wethersfield, Connecticut. 

 \/i78. Claystone concretion, Wethersfield, Connecticut. 



Annular Claystone Concretions. 

 "^YIQ. Claystone concretion, Hadley. (Plate 15, figure 1.) 

 v/l80. Claystone concretion, Hadley. (Plate 15, figure 2.) 

 ■\ 181. Claystone concretion, Hadley. 

 \/182. Claystone concretion, Hadley. 



V 183. Claystone concretion, Hadley. 

 V184. Claystone concretion, Hadley. 

 n/185. Claystone concretion, Hadley. 



