SAGENOCRINIDAE 



225 



FORBESIOCRINUS De Koninck and Le Hon 



Plates XX, figs. 4-8; XXI-XXXI; text-figs. 2a, b; 27 ; 29-31 



Forbesiocrinus De Koninck and Le Hon, Recherch. Crin. Carb. Belgique, 1854, p. 118. — Roemer in Bronn, 

 Lethaea Geognostica, I, pt. 2, 1852-54, p. 235.— Pictet, Traite Paleontologie, 1857, p. 326.— Hall, 

 Geol. Iowa, I, pt. 2, 1858, p. 628. — Bronn, Klassen u. Ord. Thier-Reichs, II, i860, p. 231. — White, 

 Boston Jour. Nat. Hist., VII, 1863, p. 497— footnote.— Meek and Worthen, Proc. Acad. Nat. Sci. 

 Philadelphia, 1865, p. 139; Geol. Surv. Illinois, II, 1866, p. 270. — Shumard, Trans. Acad. Sci. 

 St. Louis, II, 1866, p. 371. — Beyrich, Monatsber. Akad. Wiss. Berlin, Feb., 1871, p. 43 (Transl. in 

 Ann. and Mag. Nat. Hist. (4) VII, 404.— Quenstedt, Petref. Deutschlands, IV, 1876, p. 503 ; Handb. 

 Petrefaktenkunde, 1885, p. 946. — Wachsmuth, Amer. Jour. Sci., XIV, 1877, p. 184. — Wachsmuth 

 and Springer, Proc. Acad. Nat. Sci. Philadelphia, 1878, p. 252; ibid., 1888, p. 353; 1890, p. 388; 

 Revision Palaeocrinoidea, pt. I, 1879, p. 51; ibid., pt. 3, 1886, p. 145; N. A. Crinoidea Camerata, 

 1897, p. 77- — Von Zittel, Handbuch Palaeontologie, 1879, p. 353; Grundziige Palaeontologie, 1895, 

 p. 138.— Miller, N. A. Geology and Palaeontology, 1889, p. 246. — Jaekel, Zeitschr. deutsch. geol. 

 Gesell, XLIII, 1891, p. 582. — Zittel-Eastman, Textbook Palaeontology, 1896, p. 164 (Ed. 2, 1913, 

 p. 204). — Bather, Treatise on Zoology (Lankester), pt. 3, 1900, p. 190. — Springer, Mem. Mus. Comp. 

 Zool. Harvard, XXV, No. 1, 1901, p. 71; Amer. Geologist, XXX, 1902, p. 89; Jour. Geology, XIV, 

 1906, p. 518. 



Proguettardicriuus ? Steinmann, Geol. Grundlagen der Abstammungslehre, 1908, p. 153. 



Not Angelin, Icon. Crin. Sueciae, 1878, p. 9 = Lithocrinus; nor Lyon and Casseday, Amer. Jour. Sci., 

 XXVIII, 1859, p. 235 = Onychocrinus; nor Trautschold, Bull. Soc. Imp. Moscow, XL, 1867, 

 p. 31 = Synerocrinus. 



1 



WoPA^qP 







%8§ 



Fig. 26. Forbesiocrinus 



Sagenocrinidae with rays above radials separated all around. Crown elon- 

 gate ovoid. Inf rabasals recumbent, taking small part in calyx wall. . Posterior 

 basal elongated. Radianal only in upper oblique position. Anal and inter- 

 brachial areas filled by solid plates in lower part, followed by perisome, or by 

 solid plates extending to the tegmen; interbrachials in more than one series. 

 Primibrachs three, exceptionally two. Arms dichotomous, usually divergent. 

 Column large, enlarging proximally. 



