THE OOLITE FORMATION. 



205 



Plagiostoma Parkinsoni, 

 Pecten lens, 



„ punctata, 

 Unio 2 species (undetermined), 

 Terebratula fimbria, plentifully continued 

 through this bed. 



5. The next rock which occurs, has been named Gryphite 

 grit, from its containing such a vast accumulation of the 

 Grypheea cymbium ; it is a rough stone, somewhat oolitic, 

 of a brownish-red colour, giving the soil, which is formed 

 from it at the top of the hills, the appearance of the red 

 marls of the new red-sandstone formation. The stone pre- 

 sents no regular cleavage, nor does it appear to be separable 

 into distinct layers, still we find certain fossils attach them- 

 selves almost exclusively to different elevations in this 

 stratum. Thus, the G. cymbium occupies the lower third 

 of this mass of stone ; the Terebratula dygona and Pholo- 

 domya ambigua the middle position ; whilst the upper third 

 is nearly composed of the remains of Trigonia costata. Be- 

 sides these, this stratum contains a large variety of fossils 

 which are more diffused through^ the whole of the rock than 

 those just mentioned. 



I have reason to beheve that the following hst is by no 

 means complete, as every fresh search in these beds furnishes 

 us with some new species. The undermentioned are already 

 in my collection. 



Fishes. Palates of a species of Psmodus, 



and rarely found. 

 Multilocular shells. Nautilus. 



Ammonites Parkisoni, and three . 



others. 

 Belemnites brevis. 



