266 



ECHINODERMA TA. 



[PAI.. 



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

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

 Riv. Gr. 

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



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

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



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

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



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

 iarrisi, 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. 



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

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

 Riv. Gr. 



matutinus, Hall, 1847, (Asterias matu- 

 tina,) 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. 



parviusculus, Billings, 1860, Can.Nat. and 

 I 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. 

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

 simplex, S. A. 

 Miller, 1878, 

 Jour. Gin. Soc. 

 Nat. Hist, vol. 

 1. p. 29, Hud. 

 Riv. Gr. 



spinulosus, Mil- 

 ler & Dyer, 

 1878, Jour. Cin. 

 Soc. Nat Hist,, 

 vol. 1, p. 32, 

 Hud. Riv. Gr. 

 wilberanus, 



Meek & Worthen, 1861, (Petraster wil- 

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

 p. 142, Hud. Riv. Gr. 

 yEASTERiNA* McCoy, 1851, Brit. Pal. FOPS., 

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

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

 cunt; aster, star; imis, resemblance.] 

 Pentagonal, depressed, with plated disk 

 that fills up the angles, leaving the rays 

 but slightly produced ; ambulacra shal- 

 low, bordered by subquadrate plates. 

 TypeP. 



approximata, Miller & Dyer, 1878, Jour. 

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

 Riv. Gr. 



fimbriata, see Schaenaster fimbriatus. 

 jamesi, see Palseaster jamesi. 

 rigida, see Petraster rigidus. 



Fio. 380 Palteaster 

 simplex. 



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

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

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



FIG. 381. Palseasterina speciosa. 



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

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

 Riv. Gr. 



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

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

 Decade 3, p. 76, Trenton Gr. 

 PAL^CHINUS, McCoy, 1844, Carb. Foss. Ire- 

 land, p. 172. "[Ety. palaios, ancient; 

 echinus, sea-urchin.] Large, oval or 

 spheroidal ; plates spinous ; 5 to 8 ranges 

 of plates in the interambulacral areas; 

 2 ranges in the ambulacra! areas, each 

 plate perforated at the outer end by two 

 pores. Type P. koenigi. 



burlingtonensis. Meek & Worthen, 1860, 

 Proc. Acad. Nat. Sci. Phil., p. 396, and 

 Geo. Sur. 111., vol. 2, p. 230, Burling- 

 ton Gr. 



FIG. 382. Palsechinus burlingtonensis, 2 dlam. 



gracilis, Meek & Worthen, 1869, Proc. 

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

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

 PAL.EOCOMA, Salter, 1857, Ann. and Mag. Nat 

 Hint, 2d series, vol. 17. [Ety. palaios, 

 ancient ; coma, hair.] Disk small, 

 plates spinous, rays shallow, and hav- 

 ing ambulacral, adambulacral, and 

 marginal plates, the latter bearing 

 spines, inclined toward the extremity 

 of the ray. Type P. marstoni. 



