and Species of Crinoidea. 197 



P. ? dactyloides, Austin, sp. 

 Def. — The perisomic plates appear to coincide with the ge- 

 neric character of Poteriocrinites. Rays five and undivided. 

 The ray-joints are long near the body, but go on gradually 

 diminishing in size to their terminations. The proboscis shows 

 the reticulated structure peculiar to. Poteriocrinites. This spe- 

 cies appears to be small. 



Genus Cladocrinites*. 

 This genus includes the species which Mr. Phillips named 

 provisionally Isocrinites, but as Von Meyer had previously 

 founded a genus of that name, composed of quite a distinct 

 suite of fossils, we have ventured to remove the so-called Iso- 

 crinites of Mr. Phillips into our proposed new genus. 



Generic definition. — Dorso-central plates five ?, resembling 

 a tumid supra-columnar joint. First series of perisomic plates 

 (costals) five ; second series or ray-bearing plates five : all 

 these plates are remarkably short in comparison with the 

 length and size of the rays. Column generally enlarging at 

 its junction with the body, and apparently devoid of auxiliary 

 side-arms. 



C. Egertoni, Phill. sp. 



The specific definition has already been given by Mr. Phil- 

 lips ; we however differ in opinion with respect to the portion 

 of the fossil which is to be considered as the body and which 

 the rays. We consider all the joints above the second series 

 of perisomic plates as belonging to the rays, Mr. Phillips, on 

 the contrary, counts the rays only as commencing at the cu- 

 neiform joints. 



C. nobilis, Phill. sp. 



Mr. Phillips included this beautiful species amongst the 

 genus Poteriocrinites} 



C. tuberculatus, Mill. sp. 

 Miller described this Crinite as a Cyathocrinite, to which 

 genus it does not belong. 



C. longidactylus, Austin. 

 Def. — The perisomic plates conform to the generic type. 

 The five main rays are each composed of two joints only, from 

 which proceed two secondary rays ; these again subdivide, the 

 inner branches extending a considerable distance before the 

 last bifurcation takes place ; but the outer branches divide at 

 about half the distance that the inner rays do. The total 



* From klados. a branch. 



