poteeiocrinidye pentacrinus. 123 



Synonymes and References. 



Pentacriiiites subbasaltifoimis — Miller, Nat. Hist. Cr'm., p. 140. 

 — Woodvv. Cat. Vol. 2, p. 51. 



— Wetherell, in GeoL, Trans, vol. 5, pi. 8,Jifj. 3, p. 132, 

 — Morris, Cat. Brit. Foss. p. 56. 



Formation and Localities. 



London Clay, White Conduit House, Islington ; Richmond, Hampstead, and Heme 

 Bay have also been named as localities where it has been found. 



Mr. James Sowerby found some fragments of the column of this species in the London 

 Clay, at Islington ; and he informed Miller that similar fragments were occasionally met 

 with at Richmond, and also that some species were obtained when sinking a well at 

 Kensington. 



Although the specific characters of this Pentacrinus are unknown, there can be no 

 doubt of its being a distinct species, and forming one of those graduating links in the 

 series of created beings, that connect the ancient extinct crinoids with the living 

 echinoderms. 



4. Species. Pentacrinus Sowerbu. (Wetherell) 

 Plate 16, Fi(j. 3 a, and 3 b. 



The only portion known of this species is the column, but which is sufficiently 

 distinct in the arrangement of the ossicular, to entitle it to specific distinction. 



The angles of the Pentagonal joints are even more rounded in this, than in the pre- 

 ceding species, and the general surface of the column is interrupted by the projection 

 of the larger joints which occur at short intervals. 



Synonymes and References. 



Pentacrinus Sowerbii — Weth. in Gcol. Trans, vol. 5. PL 8,Jif/. 4, ;). 132. 

 —Morris, Cat. Brit. Foss. p. 56. 



