106 



Poteriocrimtes crassus is found in the magnesian beds 

 OF MOUNTAIN LIMESTONE, Clcvedon ; and in mountain 

 LIME, at Bristol; and P. tenuis, in the mountain lime of 

 Men dip and of Bristol. 



Platycrijiites Icevis occurs in the mountain limestone 

 of Mendip, and in the Black Rock, near Bristol, Dublin, 

 and Cork. P. rugosus in mountain limestone of Mendip 

 and Caldy Island. P. tuberculatus, in mountain lime 

 strata. P. striatus, mountain limestone, near Bristol. 

 P. pentangular is, mountain lIxMestone, Bristol, Mendip, 

 and Mitchel Dean; and in the transition limestone, 

 Dudley and Dinewaur Park. 



Cyathocrinites planus, in mountain limestone, Cleve- 

 don, and Black Rock, Bristol. 



C. tuherculatus, in mountain lIxMestone, Dudley? 

 C. rugosus, in transition limestone, Shropshire, Here- 

 fordshire, the islands of Oeland and Gothland, and in Dale- 

 carlia.* C. quinquaiigularis, in magnesian limestone, 

 Clevedon, and mountain limestone, Black Rock. 



Actinocrinites triaconta dactylos, in mountain lime- 

 stone, in Craven in Yorkshire, the Mendip-hills, and Black 

 Rock, Bristol. A. polyductylus, in mountain limestone 

 of the Mendip-hills and Caldy Island. A, Ice^vii,, in moun- 

 tain limestone of Mitchel Dean. 



Rhodocriiiites. R. verus, transition limestone, 

 Dudley; mountain limestone, near Bristol, Mendip-hills, 

 and Mitchel Dean. 



It appears that all the preceding remains occur in the 

 transition, the mountain and the magnesian limestone de- 

 posits, " where," as Mr. Miller observes, " they are lost. 



* It was the body of this animal which I saw in Mr. John 

 Hawker's Collection, and which, from its general form, and the 

 figure of its plates, I considered as belonging to the tortoise encri- 

 nite, or the marsupite of Mr. Mantell. 



