1881.] NATURAL SCIENCES OF PHILADELPHIA. 319 



1858. Actinocr. pernodosus Hall (Sect. A). Geol. Rep. Iowa, i, pt. ii, p. 608, PI. 

 15, figs. 3, a, b; Meek and Worthen, Geol. Rep. 111., t, p. 341. Keokuk 

 limest. Iowa and Illinois. 

 1821. Actinocr. polydaotylus Miller (not Bonney = Mariarr. pachydactylua Hall, 

 = Melocr. pachydaciylui Wachsm. and Spr.). Hist. Crinoidea, p. 103 

 Agassiz, Mem. Soo. de Neuchat., i, p. 197; Milne-Edwards, 1836, Aniin. s. 

 vert, de Lamk. (ed. ii), vol. ii, p. 670; Bronn, 1836, Lethaea Geogn , i, p 

 61, PI. 4, fig. 4, and p. 670 ; Phillips, 1836, Geol. Yorkshire, ii, p. 206, PI. 4 

 figs. 17, 18 ; de Koninck, Anim. Foss. Terr. Carb. Belg., p. 51, PI. G, figs. 3 

 a, b; McCoy, 1844, Synop. Carb. Foss. Ireland, p. 183, and British Pal. Foss 

 Mus. Cambr., ii, p. 121; de Kon. and Lehon, 1853, Recher. Crin. Belg., p 

 154, PI. 4, fig. 2 ; Roemer, .1855, Letbaea Geogn. (Ausg. 3), p. 248. Mount 

 limest. Mendip Hills, Caldy, Ireland, and Tournay, Belg. 

 1858. Actinocr. proboscidialis Hall (Sect. B). Geol. Rep. Iowa, i, pt. ii, p. 584, PI. 

 10, fig. 13 ; Meek and Worthen, 1873, Geol. Rep. 111., v, p. 341. Lower Bnr- 

 lington limest. Burlington, Iowa. 

 Syu. A. lagina Hall, 1861. Desc. New Pal. Crin., p. 13. 

 Syn. A. quaternarias Hall, 1860. Supp. Geol. Rep. Iowa, p. 22. 

 Syn. A. qnaternaiius var. spiniferas Hall, 1861. Desc. New Pal. Crin., p. 11. 

 Syn. A. themis Hall, 1861. Ibid., p. 11. 

 1844. (?) Actinocr. pusillus McCoy. Synop. Carb. Foss. Ireland, p. 182, PI. 26, fig. 

 4.- Mount, limest. Ireland. 

 There is SDme doubt whether this species belongs to Aotinocrinus ; the rays 

 are lobed but more like in species of Doryorinus. Figure and description 

 are too indistinct to ascertain therefrom the form of the anus. 

 1861. Actinocr. reticulatus Hall (Sect. B). Desc. New Spec. Crin., p. 2; also Bost. 

 Journ. Nat. Hist., p. 269; Meek and Worthen, Geol. Rep. 111., v, p. 341. 

 Lower Burlington limest. Burlington, Iowa. 

 Syn. A. locellus Hall, 1861. Desc. New Pal. Crin., p. 15. 

 Syn. A. thoas Hall, 1861. Ibid., p. 11. 

 1860. Actinocr. scitulas Meek and Worthen (Sect. A). Proc. Acad. Nat. Sci. Phila., 

 p. 386; abo Geol. Rep. 111., ii, p. 202, Ibid., v, p. 341. Upper Burlington 

 limest. Burlington, Iowa. 

 Syn. A. rusticus Hall, 1861. Desc. New Sp. Crin. p. 2; also Bost. Journ. 



Nat. Hist., p. 267. 

 Syn. A. Sillimani Meek and Worthen, 1861. Proc. Acad. Nat. Sci. Phila., 



p. 134. 

 Syn. A. Wachsmutlii White, 1861 (not 1879). Proc. Bost. Acad. Nat. Hist., 

 vol. ix, p. 17. 

 1S60. Actinocr, sexarmatus Hall (Sect. B). Supp. Geol. Rep. Iowa, p. 21 ; Meek 

 and Worthen, Geol. Rep. 111., v, p. 341, Photogr. PI. 3, fig. 26. Lower Bur- 

 lington liraest. Burlington, Iowa. 

 Syn. A. securus Hall, 1861. Desc. New Pal. Crin , p. 14. 

 Syn A. thetis Hall, 1861. Ibid., p. 11. 

 18»3. Actinocr. stellaris de Kon. and Lehon. Recher. Crin. Belg., p. 456, PI. 3, 

 figs. 3, a, b, and figs. 4, a-g ; also PI. 4, fig. 3 ; Pictet, Traite de Paleont., 

 iv, p. 323, PI. 101, fig. 5. Mount, limest. Tournay, Belg. 

 Syn. A. Gilbertsoni de Koninck (not Miller nor Phillips). Anim. Foss. du 

 Terr. Carb. de Belg., p. 50, PI. G, figs. 2, a, b, c. 

 1853. Actinocr. tennnis de Kon. and Lehon. Recher. Crin. Belg., p. 128, PI. 2 

 figs. 3, a, b. Mount, limest. Tournay, Belg. 



