172 



Description of the fossils. 



EcMnodermata. 

 Crinoidea. 



Pentacrinus. Miller. 



Pentacrinus sp. cf. Andreæ. de Loriol. 



Plate VI, figs. 1—6. 



1878. De Loriol, P. Monographie des Crinoides fossiles de la Suisse, 

 Deuxième partie. Abh. Schweiz, paläont. fies. Basel und Genf. vol. V. 

 p. 112, tab. XIV, flg. 31— 38. 



The remains of Crinoids are found in great quantities in 

 a very coarse-grained brown crinoid-sandstone from Mount 

 Nathorst. The fragments consist of stalks, cirrhi and arms, 

 but are, unfortunately, weathered and so badly preserved that 

 the species could not be determined with any certainty. A few 

 of the better-preserved stalks, however, are pentagonal, sharply 

 angular, perfectly smooth without any sculpture, and resemble 

 very closely that of Pentacrinus Andreæ^ de Loriol. Very rarely 

 fragments of stalks occur, in which the suture-line bears 

 centrally a small round depression as in Peîitacrinus crista-galU, 

 QuenstedtM (pi. VI, fig. 6), but the tubercle in the middle of the 

 side of the stem-joints, described by de Loriol as characteristic 

 of this species, has not been observed. 



') De Loriol, P. 1884—9. Paléontologie Française. Ser. 1. Animaux 

 invertébrés. Terrain jurassique. Tome XI. Deuxième partie. Crinoïdes. 

 Paris, p. 1,52, tab. 152, fig. 1 — 10. 



