Dr. FiTTON on the Strata below the Chalk. 287 



no bed strictly resembling the "Black Dirt" of Portland has yet been found 

 liere, — none including, like that bed, fragments of stone, and exhibiting so 

 obviously the characters of a coarse gravelly soil : nor have I seen or heard 

 of any instance north of Garsington_, in which silicified wood has been found 

 in this part of the series. It can only be said, therefore, that the beds above 

 the Portland here resemble those of the coast, in their sudden contrast with 

 the Portland strata, from the abundance of the freshwater fossils which they 

 contain, and the frequent alternations of beds of clay, or mud^ with the fissile 

 limestone near the contact. 



Pit at BisT/opsTONE : — in " Church Furlong " belonging to Dr. Lee. 



1. Soil bearing corn. Ft. In. 



2. Fuller's earth ; greenish and brown. Thickness very irregular. 1 in. to 1 



In this bed are iridescent Mytili, like those of the bed 7. below, and of the sections at 

 Whitchurch ; p. 288—289. 



3. Rubble ; white, freshwater limestone, decomposed : containing Cypris and casts of 1 . 



small Paludinae, in calcareous spar j 



4. Clay and stone, 



a. Light olive greenish Fuller's earth 4 



b. Soft limestone ^ 6 



c. Fuller's earth, like a 2 



d. Stone, like b 3 



e. Fuller's earth : 2 j ^ 



5. " Sandstone" , so called; firm, grey, and whitish, granular calciferous grit. It has distinct 



traces of the lines of deposition, and on the surface some approach to ripple-marks. 



— Qux. does it represent the grit of the Hastings sands ? 6 in. to 9 



6. Sand, alternating with ochre and clay, 



a. Sandy ochreous clay 2 



b. Dark greenish Fuller's earth 2 



c. Greenish grey sand, mixed with calcareous matter, and including scales 1 _, 



of fishes / - — i 1 1 



7. Fissile, calciferous clay, or marl, passing into stone. In the upper part are iridescent 



Mytili {Mytilus Lyellii ? PI, XXI. fig. 18,) like those of 2, above, and of the pits near 

 Whitchurch, 



a. Dark, bluish grey, very fissile clay, containing Cypris in great numbers, 



an oblong Unio, and small scales of fishes (Lepidotus), I j 



b. Clay; somewhat harder, less plastic, 



c. Clay ; lighter-coloured and still harder ; approaching to stone. 



All these divisions contain Cypris Valdensis and another species ; a small 

 smooth Modiola, a striated species ; and Cyclas parva, PI, XXI, fig. 7, J 



\Purbeck.~\ 



8. "Pendle": fissile, argillaceous limestone; here of a dark grey colour; in another ~| 

 ^ adjacent pit almost white : containing Cypris ; casts of Cyclas parva, some of which I 



include casts of Cypris; striated Modiolae ; small Paludinae ; and other small uni- | 

 valves, as in the Malm of Garsington 4 in. to J 



In some of the pits hereabouts, the " Pendle " contains also a depressed Planorbis, as 

 VOL. IV. SECOND SERIES. 2 P 



