xiv TABLE OF CONTENTS. 



Page 

 CHAPTER VIII. — Descriptions of the Species (continued). 



Elceacrinus Vemeuili, Roemer 216 



var. pomum, var. nov 218 



angular is, Lyon, sp 219 



sp 219 



Subfamily Schizoblastidse 220 



Definition of genus Schisoblastus 220 



General characters 221 



Schizoblastus Sayi, Shumard, sp 224 



melonoides, Meek and Worthen, sp. . . . 226 



Rofei, E. & C 228 



Definition of genus Crypt obi cist us 229 



General characters 230 



Cryptoblastus melo, Owen and Shumard, sp 232 



Definition of genus Acentrotremites 234 



Acentrotremites ellipticus, Cumberland, sp 235 



Family Granatoblasticke 237 



Definition of genus Granatocrinus 238 



General characters 240 



Granatocrinus Norwoodi, Owen and Shumard, sp. . . . 245 



orbicularis, G. B. Sowerby, sp 248 



Derbiensis, G. B. Sowerby, sp 250 



carnpanulatus, M'Coy, sp 251 



M'Coyi, sp. nov 252 



ellipticus, G. B. Sowerby, sp 253 



Definition of genus Heteroblastus 255 



Heteroblastus Cumberlandi, sp. nov 257 



Family Codasteridte 257 



Subfamily Phffinoschismida; 258 



Definition of genus Cadaster 259 



General characters 261 



Cadaster pyramidatus, B. F. Shumard 266 



trilobatus, .M'Coy 268 



var. acutus, M'Coy, var 269 



Definition of genus Phcenoschisma 270 



General characters 271 



Phcenoschisma Verneuili, E. & C 273 



Arckiaci, E. & C 274 



nobile, B. & C 275 



acutum, G. 15. Sowerby, sp 276 



caryophyllatum, de Koninck, sp. . . . 277 



Benniei, sp. nov 278 



