ECHINODERMATA. 



81 



roemeri, Shumard, 1855, (Pentremites 



roemeri) Geo. Rep. Mo., Chemung 



Gr. [Ety. proper name.] 

 sayi, Shumard, 1855, (Pentremites sayi) 



Geo. Rep. Mo., Burlington Gr. [Ety. 



proper name.] 

 shumardi, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil., Burlington Gr. 



[Ety. proper name.] 

 Graphiocrixus, De Koninck & Le Hon, 1854, 



Rech. Crin. Carb. Belg. [Ety. graphion, 



writing instrument ; krinon, a lily.] 

 brachialis, Lyon, 1857, Geo. Sur. Ky., vol. 



3, Low. Carb. [Sig. having arms.] 

 dactylus, Hall, 1860, Supp. to Geo. Rep. 



Iowa, St. Louis Gr. [Sig. fingered.] 

 quatuordecem brachialis, Lyon, 1857, Geo. 



Sur. Ky., vol. 3, Burlington Gr. [Sig. 



having fourteen arms.] 

 Hadrocrinus, Lyon, 1869, Trans. Am. Phil. 



Soc, vol. 13. [Ety. adros, full grown ; 



krinon, a lily.] 

 discus, Lyon, 1869, Trans. Am. Phil. Soc, 



vol. 13, Devonian. [Sig. a dish.] 

 pentagonus, Lyon, 1869, Trans. Phil. Soc, 



vol. 13, Devonian. [Sig. pentagonal.] 

 plenissimus, Lyon, 1869, Trans. Phil. Soc, 



vol. 13, Devonian. [Sig. the largest.] 

 Haplocrinus, Steininger, Bui. Soc. Geol. 



France t. 8, 1st series. [Ety. haploos, 



simple; fo-inon, a lily.] 

 clio, Hall, 1862, 15th Reg. Rep. N. Y., 



Marcellus shale. [Ety. mythological 



name.] 

 granulatus, Troost. Not defined. 

 liemispliericus, Troost. Not defined. 

 ma.rimus, Troost. Not defined. 

 oralis, Troost. Not defined. 

 Hemicosmites, Von Buch, 1840, Monatsber 



d. Berlin Akad. [Ety. hemi, half; 



cosmites, sphere.] 

 subglobosus, Hall, 1864, in 20th Reg. 



Rep., Niagara Gr. [Sig. somewhat 



globose.] 

 Hemicystites, Hall, 1852, Pal. N. Y., vol. 2. 



[Ety. hemi, half; faistis, a bladder.] 

 alius, a synonym for H. granulatus. 

 granulatus, Hall, 1872, Pamphlet, Cin'ti 



Gr. [Ety. from the granulated appear- 

 ance of the upper surface.] 

 parasiticus, Hall, 1852, Pal. N. Y., vol. 2, 



Niagara Gr. [Sig. parasitic] 

 stellatus, Hall, 1866, Pamphlet, Cin'ti Gr. 



[Sig. star-shaped.] 

 Heterocrine, Hall, 1847, Pal. N. Y., vol. 1. 



[Ety. heleros, irregular ; krinon, a lily.] 

 articulosus, Billings, 1859, Can. Org. Rem., 



Decade 4, Trenton Gr. [Sig. full of 



joints.] 

 canadensis, Billings, 1859, Can. Org. 



Rem., Decade 4, Trenton Gr. [Ety. 



proper name.] This species can hardly 



be separated from H. simplex, by spe- 

 cific differences, and it is doubtful 



whether it constitutes more than a 



variety, 

 constrictus, Hall, 1866, Pamphlet, Cin'ti 



Gr. [Sig. constricted.] 



constrictus var. compactus, Meek, 1873, 



Ohio Pal., vol. 1, Cin'ti Gr. [Sig. 



compact.] 

 crassus, Meek & Worthen, 1865, Proc 



Acad. Nat. Sci. Phil., Cin'ti Gr. [Ety. 



from the thick arm plates.] 

 exilis, Hall, 1866, Pamphlet, Trenton & 



Hud. Riv. Gr. [Sig. small, slender.] 

 exiguus, syn. for H. exilis. 

 gracilis, Hall, 1847, Pal. N. Y., vol. 1. 



Hud. Riv. Gr. [Sig. slender.] 

 heterodactylus, Hall, 1847, Pal. N. Y, 



vol. 1, Hud. Riv. Gr. [Sig. irregularly 



fingered.] 

 insequalis, Billings, 1859, Can. Org. Rem., 



Decade 4, Trenton Gr. [Sig. unequal.] 

 incurvus, see Anomalocrinus incurvus. 

 isodactylu.% syn. for Heterocrinus con- 

 strictus var.- compactus. 

 juvenis, Hall, 1866. Pamphlet, Cin'ti Gr. 



[Sig. voung.] 

 laxus, Hall, 1866, Pamphlet, Trenton & 



Hud. Riv. Gr. [Sig. loose.] 

 poly.ro, syn. for H. subcrassus. 

 simplex, Hall, 1847, Pal. N. Y., vol. 1, 



Trenton & Hud. Riv. Gr. [Sig. simple.] 

 simplex var. grandis, Meek, 1873, Pal. 



Ohio, vol. 1, Cin'ti Gr. [Sig. great.] 

 subcrassus, Meek & Worthen, 1865, Proc. 



Acad. Nat. Sci. Phil., Cin'ti Gr. [Sig. 



somewhat like H. crassus.'] 

 tenuis, Billings, 1857, Rep. of Progr., 



Trenton Gr. [Sig. slender.] 

 Heterocystites, Hall, 1852, Pal. N. Y., vol. 



2. [Ety. heteros, irregular; kustis, a 



bladder.] 

 armatus, ' Hall, 1852, Pal. N. Y, vol. 2, 



Niagara Gr. [Sig. having arms.] 

 Holocystites, Hall, 1864, in 20th Reg. 



Rep. [Ety. holes, entire; kustis, a 



bladder.] 

 abnormis, Hall, 1864, in 20th Reg. Rep., 



Niagara Gr. [Sig. abnormal, out of 



the usual order.] 

 alternatus, Hall, 1861, (Caryocystites 



alternatus) Rep. of Prog. Geo. Sur. 



Wis., Niagara Gr. [Ety. from the 



alternating plates.] 

 cylindricus, Hall, 1861, (Caryocystites 



cylindricus) Ann. Rep. Geo. Wis., 



Niagara Gr. [Sig. cylindrical.] 

 ovatus, Hall, 1864, in 20th Reg. Rep., 



Niagara Gr. [Sig. egg-shaped.] 

 scutellatus, Hall, 1864, in 20th Reg. 



Rep., Niagara Gr. [Sig. a salver or 



waiter of a nearly square form.] 

 sphsericus, Winchell & Marcy, 1865, Mem. 



Bost. Soc. Nat. Hist., vol. 1, Niagara Gr. 



[Sig. round-bodied.] 

 winchelli, Hall, 1864, in 20th Reg. Rep., 



Niagara Gr. [Ety. proper name.] 

 Homocrinus, Hall, 1852, Pal. N. Y., vol. 2. 



[Ety. homos, like ; krinon, a lily.] 

 alternatus, Hall, 1847, (Poteriocrinus al- 

 ternatus) Pal. N. Y., vol. 1, Trenton 



Gr. [Sig. from the alternating plates.] 



