266 



ECHINODERMA TA. 



[PAI,. 



exculptus, S. A. Miller, 1881, Jour. Cin. 

 Soc. Nat. Hist., vol. 4, p. 69, Hud. 

 Riv. Gr. 

 finii, Ulrich, 1879, Jour. Cin. Soc. Nat. 



Hist., vol. 2, p. 19, Utica Slate Gr. 

 granti, Spencer, 1884, Bull. No. 1, Mus. 



Univ. St. Mo., p. 53, Clinton Gr. 

 granulosus, Hall, 1868, 20th Rep. N.Y.St. 



Mus. Nat. Hist., p. 327, Hud. Riv. Gr. 

 harrisi, S. A. Miller, 1879, Jour. Cin. 

 Soc. Nat. Hist., vol. 2, p. 117, Hud. 

 Riv. Gr. 

 incomptus, Meek, 1872, Am. Jour. Sci., 3d 

 series, vol. 3, p. 275, and Ohio Pal., vol. 

 1, p. 64, Hud. Riv. Gr. 

 jamesi, Dana, 1863, (Palsesterina (?) 

 jamesi,) Am. Jour. Sci., 2d series, vol. 

 35, p. 295, Hud. Riv. Gr. 

 longibrachiatus, S. A. Miller, 1878, Jour. 

 Cin. Soc. Nat. Hist., vol. 1, p. 102, Hud. 

 Riv. Gr. 

 magnificus, S. A. Miller, 1884, Jour. Cin. 

 Soc. Nat. Hist., vol. 7, p. 16, Hud. 

 Riv. Gr. 

 matutinus, Hall, 1847, (Asterias matu- 

 iina,) Pal. N. Y., vol. 1, p. 91, Tren- 

 ton Gr. 

 ^ miamiensis, S. A. Miller, 1880, Jour. Cin. 

 Soc. Nat. Hist., vol. 3, p. 143, Hud. 

 Riv. Gr. 

 I" parviusculus, Billings, 1860, Can. Nat. and 

 B Geo., vol. 5, p. 69, and Acad. Geol., p. 

 594, Mid. Sil. 

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

 " p. 247, Niagara Gr. 

 pulchellus, see Stenaster pulchellus. 

 shafferi, Hall, 1868, 20th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 326, Hud. Riv. Gr. 

 simplex, S. A. 

 Miller, 1878, 

 Jour. Cin. Soc. 

 Nat. Hist., vol. 

 1. p. 29, Hud. 

 Riv. Gr. 

 spin ul.. -us, Mil- 

 ler & Dyer, 

 1878, Jour. Cin. 

 Soc. Nat. Hist., 

 vol. 1, p. 32, 

 Hud. Riv. Gr. 

 wilberanuH, 

 Meek & Worthen, 1861, (Petraster wil- 

 berianus,) Proc. Acad. Nat. Sci. Phil., 

 p. 142, Hud. Riv. Gr. 

 PaLuEasterina, McCoy, 1851, Brit. Pal. Foss., 

 p. 59, but first defined, by Salter, 1857, 

 Ann. Mag. Nat. Hist. [Kty. palaios, an- 

 cunt; aster, star; inns, resemblance.] 

 Pentagonal, depress* d, with plated disk 

 that fills up the angles, leaving the rays 

 but slightly produced; ambulacra shal- 

 low, bordered by subquadrate plates. 

 Type P. 

 approximate, Miller & Dyer, 1878, Jour. 

 Cin. Soc. Nat. Hist., vol. 1, p. 30, Hud. 

 Riv. Gr. 

 Jimbriata, see Schaenaster fimbriatus. 

 jamesi, see Palaeaster jamesi. 

 rigida, see Petraster rigidus. 



rugosa, Billings, 1857, Rep of Progr. Geo. 

 Sur. Can., p. 291, and Can. Org. Rem. 

 Dec. 3, p. 77, Hud. Riv. Gr. 



Fig. 380 — Palseaster 

 simplex. 



Fio. 381.— Palwnsterlna apeohwa. 



speciosa, Miller & Dyer, 1878, Jour. Cin. 

 Boc. Nat. Hist, vol. 1, p. 30, Hud. 

 Riv. < ir. 



stellata, Billings, 1857, Rep. of Progr. (ieo. 

 Sur. Can., p. 290, and Can. Org. Rem., 

 Decade 3, p. 76, Trenton (ir. 

 Pai.axhinus, McCoy, 1844, Carh. Fobs. Ire- 

 laml, p. 172. [Kty. palaio$, ancient; 

 echinus, sea-urchin.] Large, oval or 

 spheroidal; plates spinous ; "> to 8 ranges 

 of plates in the interambnlacral areas; 

 2 ranges in the ambulacra! areas, each 

 plate perforated at the outer end by two 

 pores. Type 1'. koenigi. 



burlingtonensis. Meek & Worthen, 1860, 

 Proc. Acad. Nat. Sci. Phil., p. 386, and 

 Geo. Sur. III., vol. 2, p. 230, Burling- 

 ton Gr. 



Fig. 382— Palsechinus burlingtonensis, 2 diara. 



gracilis, Meek & Worthen, 1869, Proc. 

 Acad. Nat. Sci. Phil., p. 82, and Geo. 

 Sur. 111., vol. 5, p. 473, Burlington Gr. 

 PALiEocoMA, Salter, 1857, Ann. and Mag. Nat. 

 Hist., 2d series, vol. 17. [Kty. palaios, 

 ancient; coma, hair.] Disk small, 

 plates spinous, rays shallow, and hav- 

 ing ambulacral, adamhulacral, and 

 marginal plates, the latter bearing 

 spines, inclined toward the extremity 

 of the ray. Type P. marstoni. 



