GEN. GI,Y.] 



ECHINODERMA TA. 



247 



Calyx having strong radial ridges and 

 depressed interradial and intersecond- 

 ary radial areas ; basals 5 ; subradials 5 ; 

 primary radials 3x5, or the left 

 posterior ray only 2 ; secondary radials 

 10 to 16 x 10 ; interradial plates numer- 

 ous and small ; azygous area supported 

 by a ridge up the middle series of 

 plates ; vault covered by small plates, 

 which are continued as a covering over 

 the arm furrows ; arms 20 or more, 

 bearing pinnules. Type G. nealli. 

 angularis, Miller & Dyer, 1878, (Glypto- 

 crinus angularis,) Jour. Gin. Soc. Nat. 

 Hist., vol. 1, p. 28, Hud. Riv. Gr. 

 cognatus.S. A. Miller, 1881, (Glyptocrinus 



cognatus,) 'Jour. 



Cin.Soc.Nat.Hist., 



vol. 4, p. 75, Hud. 



Riv. Gr. 

 m agnific us, S. A. 



Miller, 1883, Jour. 



C i n. Soc. Nat. 



Hist., vol. 6, p. 



230, Hud. Riv. Gr. 

 nealli, Hall, 1866, 



(Gly pt o c rinus 



nealli,) Adv. 



Sheets 24th Rep. 



N. Y. St. Mus. 



Nat. Hist., p. 206, 



and Ohio Pal., vol. 



1, p. 34, Hud. Riv. 



Gr. 

 splendens, S. A. 



Miller, 1883, Jour. 



Cin. Soc. Nat. 



Hist, vol. 6, p. 



230, Trenton Gr. 



GENN^OCRINUS, Wachsmuth & Springer, 

 1882, Proc. Acad. Nat. Sci., p. 334. [Ety. 

 gennaios, of noble birth ; krinon, lily.] 

 Body wider than high, lobed, striated ; 

 vault low; basals 3 ; primary radials 

 3x5; secondary radials 1x10; inter- 

 radials 5 to 7 ; azygous interradials more 

 numerous, and having three plates in 

 the second row instead of two, as in 

 Actinocrinus; interaxillaries 1 to 3. 

 Type G. cornigerus. 



calypso, Hall, 1862, (Actinocrinus calypso,) 

 15th Rep. N. Y. St. Mus. Nat. Hist., p. 

 133, Ham. Gr. 



cassedayi, Lyon, 1861. (Actinocrinus cas- 

 sedayi,) Proc. Acad. Nat. Sci. Phil., p. 

 410, Up. Held. Gr. 



cauliculus, Hall, 1862, (Actinocrinus 

 cauliculus,) 15th Rep. N. Y. St. Mus. 

 Nat. Hist, p. 132, Ham. Gr. 

 cornigerus, Lyon & Casseday, 1859, 

 (Actinocrinus cornigerus,) Am. Jour. 

 Sci., vol. 28, p. 238, Ham. Gr. 

 eucharis, Hall, 1862, (Actinocrinus eu- 

 charis,) 15th Rep. N. Y. St. Mus. Nat. 

 Hist, p. 130, Ham. Gr. 

 kentuckiensis, Shumard, 1860, (Actino- 

 crinus kentuckiensis,) Trans. St. Louis 

 Acad. Sci., p. 345, syn. for G. cor- 

 nigerus. 



FIG. 310,-Gaurocrinu 

 nealli. 



nyssa, Hall, 1862, (Actinocrinus nyssa,) 

 15th Rep. N. Y. St. Mus. Nat. Hist., p. 

 129, Ham. Gr. 



pocillum, Hall, 1862, (Actinocrinus pocil- 

 Inm,) 15th Rep. N. Y. St. Mus. Nat. 

 Hist., p. 134, Ham. Gr. 



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

 p. 187. [Ety. glyptos, sculptured ; aster, 

 star.] Calyx obconical, depressed be- 

 tween the arm bases, radial portion 

 ridged ; basals 5 ; subradials 5 ; primary 

 radials 3x5; secondary radials 2 or 

 more by 10 ; interradials 6 or more ; 

 azygous" interradials more numerous ; 

 arms 10, composed of double series of 

 plates. Type G. brachiatus. 



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

 p. 187, Niagara Gr. 



FIG. 311. Glyptaster egani. Natural size and 

 enlarged. 



egani, S. A. Miller, 1881, Jour. Cin. Soc. 



Naf Hist., vol. 4, p. 261, Niagara Gr. 

 inornatus, Hall, 1863, Trans. Alb. Inst, 



vol. 4, p. 205, and 2Sth Rep. N. Y. St. 



Mus. Nat. Hist., p. 134, Niagara Gr. 

 occidentalis, Hall, 



1863, Trans. Alb. 



Inst, vol. 4, p. 204, 



and 28th Rep. N. Y. 



St. Mus. Nat. Hist., 



p. 134, Niagara Gr. 

 occidentalis var. ere- ^ 



bescens, Hall, 1879, 



28th Rep. N. Y. St. 



Mus. Nat. Hist., p. 



133, Niagara Gr. 

 pentangularis, Hall, FlQ 



1867, 20th Rep. 



N. Y. St. Mus. Nat. Hist,, p. 369, Ni- 

 agara Gr. 

 GI.YPTOCRINUS, Hall, 1847, Pal. N. Y., vol. 1, 



p. 280. [Ety. glyptos, sculptured; 



FIG. 313. Glyptcrinus decadactylus. Part of 

 vault mag. 6 diam, showing excurrent 

 opening. 



krinon, lily.] Calyx obconoidal, inter- 

 radial areas flattened or depressed ; sur- 

 face sculptured and having radial 

 ridges ; basals 5 ; primary radials 3x5; 



