252 



ECHINODERMA TA. 



[HAD. HET. 



wachsmuthi, Meek & Worthen, 1861, 

 (Scaphiocrinus wachsmuthi,) Proc. 

 Acad. Nat. Sci. Phil., p. 141, and Geo. 

 Sur. 111., vol. 3, p. 488, Burlington Gr. 

 HADROCBINUS, Lyon, 1869, Trans. Am. 

 Phil. Soc., vol. 13, p. 445. [Ety. adros, 

 full grown ; krinon, lily.] Calyx broad, 

 low vasiform, dome hemispherical ; ba- 

 sals 3, hidden by the column ; primary 

 radials 2x5; secondary, tertiary, and 

 higher orders of radials, having 2 in each 

 series; arm-openings numerous, and 

 not separated by interradials ; inter- 

 radials 3 or 4 ; column round. Type 

 H. plenissimus. 



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

 vol. 13, p. 448, Up. Held. Gr. 



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

 vol. 13, p. 446, Up. Held. Gr. 



plenissimus, Lyon, 1869. Trans. Phil. 



Soc., vol. 13, p. 445, Up. Held. Gr. 

 Halysiocrinus, Ulrich, 1886, 14th Rep. Geo. 

 Sur. Minn., p. 110, syn. for Deltacrinus. 

 HAPLOCEINUS, Steininger, 1834,Bul. Soc.Geol. 

 France, t. 8, 1st series, p. 232. [Ety. 

 haploos, simple; krinon, lily.] Calyx 

 small subturbinate ; basals 5; radials 

 2x3 plus 1x2, protruding at the center 

 of the superior face for the attachment 

 of arms ; dome convex, composed of 5 

 plates, having sutures from the center 

 of the arm-openings toward the central 

 part of the dome. Type H.sphaeroideus. 



clio, Hall, 1862, 15th Rep. N. Y. St. Mus. 

 Nat. Hist., App. C., p. 115, Marcellus 

 shale. 



granulatus, Troost, Not defined. 



fumisphericus, Troost. Not defined. 



maximus, Troost. Not defined. 



ovalis, Troost. Not defined. 

 HEMICOSMITES, Von Buch, 1840, Monatsber. 

 d. Berlin Akad., p. 129, and Geol. Rus- 

 sia, vol. 2, p. 31. [Ety. hemi, half; 

 kosmos, sphere.] Body having four 

 series of plates; basals 4; second series 

 6; third series 9; ovarian orifice be- 

 tween second and third series ; mouth 

 central. Type H. malum. 



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

 St. Mus. Nat. Hist, p. 359, Niagara Gr. 

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

 p. 245. [Ety. hemi, half; kustis, blad- 

 der.] Parasitic, circular, more or less 

 convex on the upper surface and some- 

 times sac-like in form ; composed of 

 numerous imbricating plates ; ambu- 

 lacra 5, straight, radiating from the 

 center and composed each of a double 

 series of alternating plates, forming 

 part of the upper surface ; aperture ex- 

 centric. Type H. parasiticus, 



altus, syn. for H. granula- 



tus. 



granulatus, Hall, 1872, 24th 

 Rep. N. Y. St. Mus. Nat. 

 FIG. 328.-Hemi- Hist., pi. 6, fig. 164, Hud. 



cystites stella- Riv. Gr. 



tas- parasiticus, Hall, 1852, Pal. 



N. Y., vol. 2, p. 246, Niagara Gr. 



stellatus, Hall, 1866, Adv. Sheets 24th Rep. 

 N. Y. St. Mus. Nat. Hist., p. 215, Hud. 

 Riv. Gr. 



HETEKOCRINUS, Hall, 1847, Pal. N. Y., vol. 

 1, p. 278. [Ety. heteros, irregular; 

 krinvn, lily.] Calyx, small, slightly ex- 

 panded ; basals 5 ; radials irregular, two 

 or three of the rays having two plates 

 each, and the others only one ; four 

 radials supported on the basals ; the 

 other is smaller and rests on the azy- 

 gous plate, and supports the ventral sac 

 on one side and the brachials on the 

 other ; brachials, generally, four to each 

 ray, the last one axillary, and support- 

 ing two arms, which sometimes branch 

 at irregular distances ; pinnules strong ; 

 azygous plate pentagonal ; column pen- 

 tagonal, pentapartite ; attaching base 

 small. Type H. heterodactylus. 



ariicalosus, see Calceocrinus articulosus. 



bellevillensis, W. R. Billings, Trans. No. 

 4, Ottawa Field Naturalists Club, p. 49, 

 Trenton Gr. 



canadensis, see Ectenocrinus canadensis. 



constrictus, see Ohiocrinus constrictus. 



constrislus var. compactus, see Ohiocrinus 

 compactus. 



crassus, see locrinus crassus. 



exilis, Hall, 1866, 24th Rep. N. Y. St. Mus. 

 Nat. Hist., p. 213, Trenton and Hud. 

 Riv. Gr. 



exiguus, Meek, syn. for H. exilis. 



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

 280, Hud. Riv. Gr. Not properly de- 

 fined. 



eeniculatus, Ulricb, 1879, Jour. Cin. Soc. 

 Nat. Hist., vol. 2, p. 16, Utica Slate Gr. 



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

 1, p. 279, Hud. Riv. Gr. 



insequalis, see Calceocrinus insequalis. 



incurws, see Anomalocrinus incurvus. 



isodactylw, syn. for Ohiocrinus com- 

 pactus. 



juvenis, Hall, 1866, 24th 

 Rep. N.Y. St. Nat. Hist., 

 p. 212, Hud. Riv. Gr. 



laxus, see Ohiocrinus laxus. 



milled, Wetherby, 1880, 

 Jour. Cin. Soc. Nat. Hist., 

 vol. 3, p, 153, Trenton 

 Gr. 



cehanus, see Ohiocrinus 

 oehanus. 



pentagonus, Ulrich, 1882, 

 Jour. Cin. Soc. Nat. Hist., p IG . 329. Heter- 

 vol. 5, Hud. Riv. Gr. o c r i n u s J u- 



polyxo, syn. for locrinus venis. 

 subcrassus. 



simplex, see Ectenocrinus simplex. 



simplex var. grandis, see Ectenocrinus 

 grandis. 



mbcrastus, see locrinus subcrassus. 



tenuis, Billings, 1557, Rep. of Progr. Geo. 

 Sur. Can., p. 273, and Can. Org. Rem., 

 Decade 4, p. 50, Trenton Gr. 



vaupeli, syn. for H. constrictus. 



