105 



whose lateral bevelled angles are inserted five heptagonal 

 first costals : from each scapula proceeds an arm supporting 

 two hands. There is only one species, 1. R. verus. 



IV. CoADUNATA ; the joints of the pelvis anchylosing 

 to the first columnar joint, i. Eugeniacrinites, a clove-like, 

 lily-shaped animal, of which but one species is known, 

 1. E. quinqimngularis. 



Fossil pentagonal plates are frequently found in chalk, 

 which are sometimes connected, and form a body of a mar- 

 supial form : considering these remains as belonging to an 

 animal of the family of the encrinites, I introduced them in 

 Organic Remains, vol. ii. Tab. xiii. fig, 2 k as portions of the 

 tortoise encrinite, deriving its name from its plates. Since 

 which, Mr. Mantell has investigated the remains of this 

 animal with so much care, as to have ascertained it to have 

 been an unattached animal, and without a column : and from 

 its purse-like form Mr. Mantell has denominated the fossil 

 marsupites. An interesting account of this fossil may be 

 found in the work of Mr. Mantell on the South Down fossils. 



The observations of Mr. Miller, on the geological distri- 

 bution of the crinoidea, are highly interesting ; and I am 

 pleased with the opportunity of pointing out to the student 

 the localities of the different species from Mr. Miller's work; 

 and to add, that the localities of the specimens which I 

 possess, serve to confirm these important observations, and 

 to encourage the opinion that the different genera and spe- 

 cies of this family have commenced and terminated their 

 existence at different periods. 



Cyathocrinites rugosus is found amongst the earliest 

 traces of organic remains, imbedded in the transition 

 LIMESTONE formation, in Shropshire, Herefordshire, the 

 islands of Oeland and Gothland, and in Dalecarlia. C quin- 

 qvangularis occurs in the magnesian variety of the moun- 

 tain LIMESTONE, at Clevcdou ; and in mountain lime- 

 stone, at the Black Rock, near the Avon. 



p. 



