234 



ECHINODERMA TA. 



[COM. — CTE. 



obconicus, Meek & Worthen, 1865, (C. 



shumardi var. obconicus,) Proc. Acad. 



Nat. Sci. Phil., p. 144, and Geo. Sur. 



111., vol. 3, p. 294, Trenton Gr. 

 punctatus, Billings, 1854, Can. Jour., vol. 



2, p. 270, and Can. Org. Rem., Decade 



3, p. 61, Trenton Gr.. 



shumardi, Meek & Worthen, 1865, Proc. 

 Acad. Nat. Sci. Phil., p. 143, and Geo. 

 Sur. 111., vol. 3, p. 292, Trenton Gr. 

 Compsastek, Worthen & Miller, 1883, Geo. 

 Sur. 111., vol. 7, p. 327. [Ety. kompsos, 

 elegant ; aster, star.] Central disk small ; 

 rays large, long, fusiform ; grooves 

 deep, bordered by numerous adambu- 

 lacral plates ; several rows of disk- 

 plates upon each side of the ambula- 

 cral furrows. Type C. formosus. 

 formosus, Worthen & Miller, 1883, Geo. 

 Sur. 111., vol. 7, p. 327, Kaskaskia Gr. 

 Compsockinus, S. A. Miller, 1883, Jour. Cin. 

 Soc. Nat. Hist., vol. 6, p. 233. [Ety. 

 kompso8, elegant; krinon, lily.] Basals 

 4; primary radials, 3x5; secondary 

 radials 2 or more by 10 ; tertiary radi- 

 als more or less numerous; median 

 line of radials keeled ; interradials nu- 

 merous; column four-sided. Type C. 

 harrisi. 



harrisi, S. A. 



Miller, 1881, 



(Glyptocrinus 



harrisi,) Jour. 



Cin. Soc. Nat. 



Hist., vol. 4, p. 



74, Hud. Riv. 



Gr. 

 Conocrinvs, Troost. 



Not defined. 



CORD YLOCRINI s, 



Angelin, 1878, 

 Icon. ( ' r i n . 

 S u e c . , p. 3. 

 [Ety. kordyle, 

 a cudgel ; kri- 

 non, lily.] Body 

 resembling Platycrinus ; basals 3 ; un- 

 equal ; radials 3x5; arms single or 

 branching; pinnules long ; interradials 

 between the upper edges of the first 

 radials; followed by 3 or 4 more; 

 column cylindrical. Type C. comtus. 



Fig. 271. — Comp8ocrimiH 

 harrisi. Mag.2diam. 



Fig. 272.— Compsocrlnus harrisi. Diagram of 

 basal part and a specimen flattened, natural 

 size. 



parvus, Hall, 1861, (Platycrinus parvus,) 

 Pal. N. Y., vol. 3, p. 114, Low 

 Held. Gr. 



plumosus, Hall, 1861, (Platycrinus plu- 



mosus,) Pal. N. Y., vol 3, p. 113, Low. 



Held. Gr. 

 ramulosus, Hall, 1861, (Platycrinus ram- 



ulosus,) Pal. N. Y., vol. 3, p. 115, Low. 



Held. Gr. 

 Coronocrinus, Hall, 1869, Pal. N. Y., vol. 3, 



f). 124. [Ety. korone, a crown ; krinon, 

 ily.] Founded upon the fragment of 

 the upper part of the calyx showing 

 great breadth, probably hemispheric 

 form, and as many as 40* arm openings 

 in the circumference. Wacbsmnth 

 says it is a syn. for Dolatocrinus, but 

 as that genus is not known, in rocks, so 

 low as this is found, there is great 

 doubt about the synonymy. Type C. 

 polydactylus. 

 polydactylus, Hall, 1859, Pal. N. Y., vol. 

 3, p. 124, Low. Held. Gr. 

 Cotvlkdonocbinus, Casseday & Lyon, I860, 

 Proc. Am. Acad. Arts and Sci., vol. 5, 

 p. 26. [Ety. kotyledon, any cup-shaped 

 cavity; krinon, lily.] Basals 2; radials 

 3x5; secondary radials 2 x 10 ; arms 

 10; interradials 3x5. Distinguished 

 from Dichocrinus by having no azygous 

 plate in line with the first radials, and 

 believed, by Wachsmuth, to have 

 been founded upon an abnormal Dicho- 

 crinus. Type C. nentalobus. 

 pentalobus, Casseday & Lyon, 1860, 

 Proc. Am. Acad. Arts and Sci., vol. 5, 

 p. 26, Kaskaskia Gr. 

 Cremacrinus, Ulrich, syn. for Calceocrinus. 



punctatus, see Calceocrinni punctatus. 

 Cbinocystitbs, Hall, 1864, 20th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 301. [Ety. 

 krinon, lily ; kustis, bladder.] Elongate, 

 swelling in the upper third of the 

 azygous side, and contracting below the 

 arms; covered by five or more ranges 

 of irregularly disposed plates; central 

 and submarginal apertures. Type C. 

 chrysalis, 

 chrysalis, Hall, 1864, 20th Rep. N. Y. St. 



Mus. Nat. Hist., p. 362. Niagara Gr. 

 (?) rectus, Hall, 1864, see Rhodocrinus (?) 

 rectus. 

 Orinosoma antiqua, Castelnau, 1843, Syst. 



Sil. Probably a fucoid. 

 Cromyocrinus, Trautschold, 1867, syn. for 

 Eupachycrinus. 

 gracilis, see Eupachycrinus gracilis. 

 Crumensecrinites, Troost, 1850. Not defined. 



ovalis, Troost, 1850. Not defined. 

 Oryptoblastus, Etheridge & Carpenter, 1886, 

 Catalogue of Blastoidea, p. 229. This 

 genus is founded upon Granatocrinus 

 melo, and distinguished from Granato- 

 crinus, by a slight difference, in the 

 hydrospires. They also referred to it 

 G. pisum, and two other species, about 

 which they had very little informa- 

 tion. 

 Ctenocrinw, Bronn, 1840, Leonh. und 

 Bronn. Jahrb, syn. for Melocrinus. 

 bainbridgensis, see Melocrinus bainbridgen- 

 sis. 



