SAGENOCRINIDAE 



215 



SAGENOCRINUS Austin 



Plates XVIII, XIX 



Sagenocrinites Austin and Austin, Ann. and Mag. Nat. Hist., X, 1842, p. no. Ann. and Mag. Nat. Hist., 

 XI, 1843, p. 205. 



Sagenocrinus, Bronn, Lethaea Geognostica, I, 1856, p. 22; Klassen u. Ord. Thier-Reiches, II, i860, p. 231. — 

 Roemer in Bronn, Lethaea Geognostica, II, 1852-54, p. 228. — Pictet, Traite Paleontologie, IV, 

 1857, p. 323. — Angelin, Icon. Crin. Sueciae, 1878, p. 8. — Von Zittel, Handbuch Palaeontologie, I, 

 1879, p. 375; Grundziige Palaeontologie, 1895, p. 130 (Sageniocrinus). — Oehlert, Bull. Soc. Geol. 

 France (3) VII, 1879, p. 7, Sep. (1878), p. 2. — Wachsmuth and Springer, Revision Palaeocrinoidea, 

 pt. 2, 1881, p. 201; ibid., pt. 3, 1885, p. 99; Proc. Acad. Nat. Sci. Philadelphia, 1888, p. 357; ibid., 

 1890, p. 388. — Jaekel, Zeitschr. deutsch. geol. Gesell., XLIX, 1S97, p. 46. — Bather, Geol. Mag. 

 (Dec. IV) V, 1898-99, p. 428; Treatise on Zoology (Lankester), pt. 3, 1900, p. 190. — Springer, Mem. 

 Mus. Comp. Zool. Harvard, XXV, 1901, p. 71 ; Amer. Geologist, XXX, 1902, p. 89; Jour. Geology, 

 XIV, 1906, p. 518. — Zittel-Eastman, Textbook Paleontology, 19 13, p. 204. 



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Fig. 24. Sagenocrinus 



Sagenocrinidae with rays separated by interbrachial plates in wide areas. 

 Crown elongate, ovoid to biturbinate. Infrabasals usually recumbent, taking 

 small part in the formation of the calyx wall. Radianal obliquely under right 

 posterior ray, more or less between basals, usually touching infrabasals. 

 Posterior basal not materially larger than the others. Anal and interbrachial 

 areas completely filled by numerous solid plates in more than one series. Primi- 

 brachs two. Arms dichotomous, not abutting. Column large, not expanding 

 at the calyx. 



Genotype. Actinocrinites ? expansus Phillips. 



Distribution. Silurian; England, Gotland, and the United States. 



