62 1'LATYCRlNlU.i;. — CYATUOCRINUS. 



attachment of the muscles and ligaments, the grooves extending from the perforation to 

 the upper margin of the plates. Above the perforations the plates inarch, as in the 

 typical species, until they almost cover in the vertex, which above the ray-bearing 

 plates was probably protected by a coriaceous integument closely studded with small 

 calcareous plates. 



All the second series of plates have similar elevated stria3 to the first. 



The intermediate or non-ray-bearing plate occurs, as is generally the case in the 

 Cyathocrini, over the hexagonal plate of the first series, and supports the plates at the 

 base of the oral aperture. 



The passage through the dorso-central plate into the columnar canal appears circular 

 in all the specimens we have examined, and we consider the passage through the column 

 to be round also. 



3. Species. Cyathocrinus? pinnatus. (Goldfuss.) 

 PI. VII fg. 6, a, h. 



Definition. — Number and arrangement of the perisomic plates unknown; rays closely 

 tentaculated ; column furnished with branching auxiliary side arms. 



Synonymes and References. 



Cyathocrinites pinnatus. — Goldfuss. Pet. G. t. 58ficf. 7. 

 Cyathocrinus pinnatus.— Phill. Pal. Foss. t. 16, /. 45, p. 31. 



Formation and Localities. 



Devonian strata. — Staunton?; Mudstone Bay?; Eifel. 



We much doubt the propriety of retaining the pinnatus among the Cyathocrini, for the 

 ravs and columns which Goldfuss has figured as typical of the species, may belong to 

 two very different crinoids, as they have never been seen attached to a body. All the 

 specimens attributed to this species which we have examined are imperfect and unsatis- 

 factory, we have therefore in this instance broke through our rule of only illustrating 

 from the specimens themselves, and taken our figures from Goldfuss, without being 

 answerable for their correctness. 



