128 rOTERIOCMNID.i: PENTACRINUS. 



from the Inferior Oolite at Leckhampton, near Cheltenham. These we consider as 

 portions of an undescribed species which bears some resemblance to the P. basalliformis, 

 but yet possessed of sufficient characteristic marks to remove it from that species. 



The chief distinctive features of the column of this species are its more decided 

 stellular form than most others of the genus, the re-entering angles going far in towards 

 the central axis, and the peculiarity observable in one part of every alternate joint at 

 its inmost angle projecting beyond the intervening ones, while all the joints at the salient 

 angles are level with the general surface. The crenated ridges on the facets of the 

 joints are also but faintly indicated, and on some of the articuldlions they are wholly 

 wanting. 



The Rev. P. D. Brodie appears to have been the first to notice the occurrence of this 

 Pentacrinns in the Roe stone, the local name given to a subordinate member of the 

 Inferior Oolite, but he has not met with any portions of the body, so that all the 

 knowledge we possess of this crinoid is derived from the fragments of columns 

 collected by its discoverer. 



It is to be hoped, now that attention has been directed to the subject, that the dis- 

 covery of the body and rays of this Pentacrinus will reward the exertions of those who 

 devote much time and labour in searching for the hidden treasures of by-gone ages. 



Pentacrinus cingulatus. {Munster^ 



As nothing but fragments of the column have been obtained in the Jurassic rocks, it 

 is perhaps premature to speculate on the probability or improbability of this being a 

 distinct species. Our own impression however is that these portions of columns may 

 justly be referred to the P. Millerii, (P. scalaris of Goldf.) 



Figures and description of specimens from the Jura-formation are inserted in Goldfuss' 

 work, PI. 53, fig. 1, p. 174. 



Pentacrinus pentagonalis. {Goldfuss.) 



The columnar fragments on which this species is founded, we consider as identical 

 with the preceding. They are probably those of young immature individuals- 

 Figures and description of this Pentacrinus are given by Goldfuss, PL 53, fig- 2, 

 p. 175. In the illustrations the figures are greatly enlarged- 



