1881.] NATURAL SCIENCES OF PHILADELPHIA. 249 



1861. PI, scobina Meek and Worthen. Proc Acad Xat. Sci. Phila., p. 129 ; also 

 Geo). Rep. 111., iii, p. 466, PI. 16, fig. 9. Lower Burlington limegt. Bur- 

 lington, Iowa. 

 Stfn. PI. clytis Hall, 1861. Bost. Jour. Nat. Hist., p. 285, Separate photogr. 

 plates, i, fig. 4. 

 1858. PI. BCulptus Hall. aeol. Rep. Iowa, i, Pt. ii, p. 536, PI. 8, fig. 11. LoWer 



Burlington limest. Burlington, Iowa. 

 1858. PI. Shutnardianus Hall. Geol. Rep. Iowa, i, Pt. ii, p. 532, PI. 8, fig. 5. 



Lower Burlington limest. Burlington, Iowa. 

 1844. PI. similis McCoy. Carb. Foss. Ireland, p. 177, PI. 26, fig. 6; D'Orbigny, 



Prodr. i, p. 156. Mount, limest. Ireland. 

 1842. PI. spinosus Aust. f Ann. and Mag. Nat. Hist., x, p. 109, and xi, p. 199; 

 also Mon. Rec. and Foss. Grin., p. 19, PI. i, figs. 2 k, o, p, q, r, s ; De Kon. 

 and Leh., 1853, Rech. Grin. Garb. Belg., p. I6f>, PI. 6, fig. 2 a, b. Mount 

 limest. Mendip Hills, Eng., and Tournay, Belg. 

 Syn. Engeniaorinites (?) hezagonus Miinster, 1839. Beitr. z. Petref. i, p. 4, 

 PI. 1, figs. 6 a, b: De Kon. 1842, Desc. Anim. Foss. Carb. Belg., p. 39, PI. 

 E, figs. 5 a, b, c. 

 Syn. PI. laevis (in part) Miller. 1821, Hist. Grin., p. 74, PI. 1, fig. 4 (not the 

 other figures). 

 1821. PI. striatus Miller. Hist. Grin., p. 82; Agassiz, 1835. Mem. Soc. des Sci, 

 Nat., Neuchat. i, p. 196 ; Austin, 1842, Ann. and Mag. Nat. Hist., x, p. 

 109; Blainville, 1834, Man. d'Act., p. 262; De Kon., 1842, Desc. Anim. 

 Foss. Carb. Belg., p. 44; Milne-Edwards apud Lamarck, ii, p. 666; Austi^, 

 1843, Mon. Rec. and Foss. Grin., p. 37, PI. 3, figs. 3 p-u. Mount, limest. 

 Bristol, Engl. 

 1858. PI. subspinosus Hall. Geol. Rep. luwa, i, Pt. ii, p. 536, PI. 8, figs. 9. 10; 

 Meek and Worthen, 1866. PI, (Pleurocrinus) subspinosus, Geol. Rep. 

 111., ii, p. 173, PI. 15, fig. 6, and vol. v, PI. 11, fig. 2. Lower Burlington 

 limest, Burlington, Iowa. 

 1860. PI, subspinulosus Hall. Supp. Geol, Rep. Iowa, p. 81. Upper Burlino'ton 

 limest. Burlington, Iowa. 

 Syn. Dichocrinus lachrymosus Hall, 1860. Supl. Iowa Rep., p. 84. 

 1865. PI, tenuibracMatUS Meek and Worth. Proc. Acad. Nat. Sci. Phila., p. 168; 

 also Geol. Rep. 111., v, p. 450, PI. 3, fig. 4. Upper Burlington limest. Bur- 

 lington, Iowa. 

 1842. PI, trigintidactylus Austin (Pleurocrinus). Ann. and Mag. Nat. Hist., x, 

 p. 69; also 1844, Mon. Rec. and Foss. Grin., p. 30, PI. 3, figs. 1 b-h (not a 

 = PL auslinianua). Mount, limest. Bristol, Eng. and Tournay, Belo-. 

 Syn. PI. triacontadactylus McCoy, 1844, Garb. Foss. Ireland, p. 177, PI. 25, 

 figs. 2-7. 

 1858. PI. truncatulus Hall. Geol. Rep. Iowa, i, pt. ii, p. 538. Lower Burlington 



limest. Burlington, Iowa. 

 1821, PI, tuberculatus Miller.— Pleurocrinus— (not P. tuberculatus Phillips = 

 Hexaoiniis). Hist. Crin., p. 81, figs. 1, 2; Schlotheim, 1822, Nachtr. z. 

 Petref. i, p. 85, and 182.3, lb. ii, p. 97, PI. 26, figs. 2 a-b ; Agassiz, 1835, 

 Mem. de la Soc. Nat. Sci. Neuchat., i, p. 197. Mount, limest. Mendip 

 Hills, Eng., and Tournay, Belg. 

 Syn. PI, ellipticus (in part) Phillips. Geol. Yorkshire, ii, PI. 3, fig. 19 (not 

 21); also Austin, Mon. Rec. and Foss. Grin, PI. 4, figs. 3, p to u ; McCoy, 

 Carb. Foss. Ireland, p. 177. 



