SAGENOCRINIDAE 20J 



TEMNOCRINUS Springer 

 Plate XVI 



Temnocrinus Springer, Amer. Geologist, XXX, 1902, p. 94; Jour. Geology, XIV, 1906, p. 518. — Ziltel- 



Eastman, Textbook Paleontology, 1913, p. 204. 

 Cyathocrinites, Miller (in part), Nat. Hist. Crinoidea, 1821, p. 88. 

 Fsocrinus, Phillips (in part), Pal. Fossils Cornwall, 1841, p. 30. 

 Cladocrinites, Austin (in part), Ann. and Mag. Nat. Hist., XI, 1843, p. 197. 

 Cupulocritms, D'Orbigny (in part), Prodrome Pal. Strat., I, 1849, p. 46. 

 Taxocrinus, Wachsmuth and Springer (in part), Revision Palaeocrinoidea, I, 1879, p. 49. 

 Cyathocrinus, Roemer in Bronn (in part), Lethaea Geognostica, I, 1852-54, p. 236. 



* £ 9 & '° 



Fig. 22. Temnocrinus 



Sagenocrinidae with rays above radials separated by solid plates in lower 

 part of areas. Crown elongate, expanding upward. Infrabasals recumbent, 

 taking small part in calyx wall. Radianal in primitive position in form of radial 

 directly under right posterior ray. Anal x and few smaller plates filling only 

 lower part of area. Interbrachials few, followed by perisome passing into the 

 tegmen. Primibrachs two. Arms dichotomous, divergent. Column with 

 proximal enlargement. 



Genotype. Cyathocrinites tuberculatus Miller. 



Distribution. Silurian; England. 



This genus was founded upon a species which has been more frequently cited, figured, 

 and discussed than any other species of the group, often as the chief representative of Taxo- 

 crinus, if not the actual type. As is more fully shown in the discussion under that genus, 

 Phillips did not designate any type species, but there are good reasons for considering that 

 the genotype was one of the species which he himself described, and not Miller's Cyatho- 

 crinites tuberculatus which he associated with them in his proposed generic group. Miller's 

 species differs from the others in the presence of a radianal under the right posterior ray, 



