1886.] NATURAL SCIENCES OF PHILADELPHIA. 69 



GNOKIMOCRINUS W. and Sp., Rev. i, p. 50. 

 FORBESIOCEINUS De Koninck, Rev. i, p. 51. 

 Additional species : 



1859. Forbesiocrinus Saffordi Hall, Suppl. Geol. Rep. Iowa, p. 87. Keokuk lime- 

 stone. AVhite's Creek, Tenn. 



1879. F. parvus Wetherby, Jour. Cinein. Soc. Nat. Hist. (October number), p. 5, PI. 

 11, tigs. 4 a h. Kaskaskia gr. Pula.ski county, Ky. 



N. B. Forbesiocrinus Whitfieldi Hall, which has been referred 

 to the genus Taxocrinus, according to Meek and Worthen (Geol. 

 Rep. Illinois, vol. v, p. 553), came from the Kaskaskia group, of 

 Randolph Co., 111., and not from the Keokuk limestone, as 

 stated by Hall. It also occurs at that horizon in Pulaski 

 Co., Ky. 



LITHOCRINUS W. and Sp., Rev. i, p. 52. 



ONYCHOCRINUS W. and Sp., Rev. i, p. 53. 



1882. Onychocrinus distensus Worthen, Bull. 111. St. Mus. Nat. Hist , p. 31, also 

 Geol. Rep. 111., vii, p. 307, PI. 29, fig. 5. Kaskaski gr. Monroe Co., 111. 

 (AVe are unable to distinguish this specimen from 0. cxsciilptus Lyon and 

 Cass.) 



NIPTEROCRINUS Wachsm., Rev. i, p. 55. 



Zittel (Handb. der Pal., p. 352) refers this genus to the Cyatho- 

 crinidse^ probably on account of its three small underbasals. 

 The presence of interradials clearlj^ removes it from that family, 

 and its waving sutures leave no doubt that it was properly 

 placed by us among the Ichthyocrinidse. 



Family XII. CROTALOCRINID^. 



CROTALOCRINUS Austin, 



1843. Austin, Ann. and Mag. Nat. Hist., Ser. I, vol. xi, p. 198. 



1848. Moiris, Cat. Brit, Foss., Ed. 1, p. 50. 



1854. Salter, apud Murchison, Siluria, Ed. 2, p. 219. 



1855. McCoy, Brit. Pal. Foss., p. 55. 

 1873. Salter, Cat. Mus. Cambr., p. 123. 



1878. Angelin, Icon. Criu. Suec, p. 36, 



1879. Zittel, Handb. d. Pal,, i, p. 356. 



1882. De Loriol, Pal. d. France, tome 11, Crin., p. 51. 



Syn. Anthocrinus, 1853, Miiller, Abliandl, Aka. Berlin, p. 192 ; 

 1857. Pictet Traite de Pal., iv, p. 312 ; 1862. Dnjardin and Hupe, 

 Hist. Nat, Zooph. Echin., p. 117 ; 1855. Quenstedt, Handb. d. 

 Petref., iv, p. 943. 



