310 PROCEEDINGS OF THE ACADEMY OF [1879. 



1861. Cyathocr. parvibrachiatus Hall. Desc. New. Pal. Crin., p. 6 ; Bost. Journ. 



Nat. Hist., p. 294. Keokuk limest. Subcarb. Keokuk, Iowa. 



1821. Cyathocr. planus Miller. A History of the Crinoidea, p. 85, figs. 29, 30 

 (not figs. 1 and 28); Austin, 1843; Rec. & Foss, Crin. p. 59, pi. 7, figs. 

 4 a-e. Subcarboniferous. Near Bristol, England. 



1863. (?) Cyathocr. polyxo Hall. New sp. foss. from Niagara Gr. p. 5; and figured 

 without description, 28th Rep. N. Y. St. Cab. Nat. Hist., pi. 15, figs. 10-17. 

 Niagara limest. Upper Silur. Waldron, Indiana. (This is evidently not 

 Cyathocrinus, but its generic relations cannot be ascertained from the ma- 

 terial which has been discovered.) 



1870. Cyathocr. poterium Meek & Worthen. Proc. Acad. Nat. Sci. Phil., p. 24; 

 Geol. Rep. 111., vol. v. p. 489, pi. 12, fig. 4. Keokuk limest. Subcarb. 

 Crawfordsville, Indiana. 



*1859. Cyathocr. pulchellus Billings. (Palseocr. pulchellus.) Geol. Surv. Can., 

 Dec. iv. p. 46. Trenton limest. L. Silur. Ottawa, Can. 



1878. Cyathocr. ramosus Aigelin. Iconogr. Crin. Suec, p. 22, pi. 20, figs. 1-3. 

 Upper Silur. Gotland, Sweden. 



1856. (?) Cyathocr. radiatus Eichwald. (Apiocrinus radiatus.) Bull. Soc. des 

 Nat. de Moscou, p. 115; Lethtea Rossica, p 592, pi. 31, figs. 50 a-f. Car- 

 boniferous. Near Moscow, Russia. (Perhaps Poteriocrinus the figures 

 not sufficiently intelligible.) 



*1S59. Cyathocr. rhombiferus Billirjgs. (Palseocrinus rhombiferus.) Geol. 

 Surv. Can., Dee. iv. p. 45. Trenton limest. L. Silur. Ottawa, Can. 



1862. Cyathocr. rigidus White. Proc. Bost Soc. Nat. Hist., p. 8. Lower Bur- 



lington limest. Subcarb. Burlington, Iowa 

 1858. Cyathocr. rotundatus Hall. Geol. Rep. Iowa, vol. i. pt. ii. p. 555, pi. 9, 



figs. 7 a, b. U,,per Burlington limest. Subcarb. Burlington, Iowa. 

 1826. Cyathocr. rugosus Goldfuss. Subcarboniferous. Saxony. 

 I860. Cyathocr. saffordi Meek k Worthen. Proc. Acad. Nat Sci. Phil., p. 371; 



Geol. Rep. 111., vol. ii. p 236, pi. 17, figs. 5 a, b. Keokuk limest. Sub- 

 carb. Tennessee. 

 *1859. Cyathocr. striatus Billings. (Palseocr. striatus.) Geol. Surv. Can , Dec. 



iv. p. 25, pi. i. fig. 5 a, b Chazy limest. Montreal, Can. 

 1878. Cyathocr. striolatus Angelin. Iconogr. Crin. Suec, p. 23, pi. 19, fig. 9. 



Upper Silur. Gotland, Sweden. 

 1868. Cyathocr. tenuidactylus Meek & Worthen. Proc. Acad. Nat. Sci. Phil., p. 



238; Geol. Rep. 111., vol. v. p. 403, pi. 2, fig. 15. Lower Burlington limest. 



Subcarb. Burlington, Iowa. 

 1868. Cyathocr. waukoma Hall. 17th Rep. N. Y. St. Cab. Nat. Hist, p. 324, pi. 



11, figs. 13, 14. Niagra Gr. Upper Silur. Racine, Wisconsin. 

 1878. Cyathocr. zonatus Angelin. Iconog. Crin. Suec, p. 22, pi. 6, fig. 5. Upper 



Silur. Gotland, Sweden. 



Note. Cyathocrinus Ilarrodi, n. sp. Form of calyx shallow, cup- 

 shaped, the lower portion truncate and slightly excavated. 



Undcrbasals very small, subquadrangular, spread out horizontally, and 

 forming a nve-rayed star. Basals large, a little wider than high, bending 

 abruptly toward the underbasals in such a manner that the lower half of 

 the plate stands on a level with the hitter. The radials are of the size of the 

 basals perhaps a trifle smaller once and a half as wide as high, subpentan- 



