species of these minute stellitee. The specimen from which the copies, 

 Plate I. Fig. 19 and 20, were made, having been originally in Mr. 

 Strange's museum, was most probably obtained, with the former, from 

 Verona. 



Plate I. Fig. 20, exhibits the interior part of the fossil. The radii 

 are connected at their sides by a substance, which, in the recent animal, 

 was doubtlessly membranaceous. The mouth is surrounded by five sub- 

 cordiform substances, disposed between the central terminations of the 

 radii. 



Plate I. Fig. 19, represents the superior surface, which appears to 

 have been smooth. The radii, however, are here unexpectedly sul- 

 cated ; a circumstance which, however, may have proceeded from the 

 contraction of the membrane over them, in its dried state. 



In its general appearance, this stellite resembles the Stella cartilaginea 

 of Aldrovandus; or Stella membranacea, as Linck would rather call it. 

 But its great degree of comparative thickness, and a curiously-figured 

 process on its sides, mark an essential difference between the two, besides 

 that of their size. 



You have perceived, by the preceding account, that the fossil remains 

 of these animals are rare. But you will also discover, that as far as 

 my reading and observations extend, that the difference between the 

 fossil remains and the recent animals does not appear to be so great as 

 was observable, whilst examining the fossil animal remains noticed in the 

 former volume. 



