TABLE OF SPECIES. 



329 



GENERA AND SPECIES. 



Conuljria trentonensis, 



— granulata, 



— papillata, 



— gracilis, 

 Theca triangularis. 



Hall 



CRUSTACEA. 

 lUsnus arcturus, " 



— crajjsicauda ; Wahltnberg , , 



— craasicauda, " 



— trentonensis, Emmoni 



— latidorsata. Hall 



Thaleops (Illienus) ovatus, Conrad . . 

 Asaphus.' oblusus. Hall 



— marginalia, " ...••• 



extans, " 



nodostriatuii, " 

 latimarginata, " 



laotelus canalis, Conrad 



— giga»? Dekay 



— gigaa. 



Hall 



Ogyeia.' velusta, 



AJclJaspis trentonenais, " . . . . 



— apiniger, " .... 

 Platynotua trcntonensis, Conrad . . . 

 Ceraurus ? ig. indet. 



— pleurexanthemus, Gre«n.. 



— vigilana, Hall .... 



— pustulosua, " . . . . 

 Calymene multicosta, " , . . . 



beckii. Green 



— scnaria, Conraii. ... 



— («/». indet ) 



Phacops callicephalua. Hall 



— .' laticaudus, " 



Trinncleus conccntricus, Eaton 



Olenua asaphoidet;, Emmons. . , . 



— undulostriatua, //a//. ., 



Agnostiis lobatus, " . 



Cytlierina {»p. indtt ) 



Plate and figure. 



Ux, 4 o -/ 

 lix, 5 a, b 

 lix, 6 a, 6 

 lix, 7 a, 6 

 Ixxxvii, 1 a 



-d 



iv (bis), 12 



iv (bis), 13 



Ix, ia-d 



)x, 5 



Ix, ti a, 6 



Ixvil, 6 a - c 



iv (bis), 14 



iv (bis), 1.5 



Ix, 2, 2 a 



Ixi, 1 a, 6 



Ixvi, 4 a, 6 



iv (bis), 17, 18, 19 



iv (bis), 16 



Ix, 7; Ixi, 3,4 ) 



Ixii, 1, 2; Ixiii ] 



Ixvi, 5 



Ix, 1 



Ixiv, 4 a -f 



Ixiv, 5 



Ixiv, 1 o - e 



iv (bis), 20 



Ixv, 1 a-m 



Ixvi, \ a- h 



Ixv, i a-h 



Ixi, 2 a, 6 



Ix, 3 



Ixiv, 2 a - e 



Ixvi-, 2 o - * 



Ixvii, 4 a - e 



3 o - in 



3 a, 6 

 3 o-i 



3 

 i a - e 



1 o-A 



2 a-e 



3 a, i 

 5o-/ 



Ixiv, 



Ixvi, 



Ixv, 



Ixiv, 



Ixv, 



Ixvii, 



Ixvii, 



Ixvii, 



Ixvii, 



12 



Page. 



222 

 223 

 223 

 224 

 313 



23 



24 

 220 

 230 

 230 

 259 



24 



24 

 228 

 248 

 253 



25 



25 



231 



254 

 227 

 240 

 241 

 235 

 25 



242 



245 

 246 

 228 

 237  



250 ( 



238' 

 253 

 247 

 248 

 249: 

 255 

 256 

 258 

 258 

 44 



Rocks & Groups. 



+ 



+ 



+ 



+ 



X 



+ 



+ 



+ 



+ 



4- 



NoTB- S«Teral species of Graptoliihiu are marked as occurrinif in the shales of the Hudson-rirer ffronp only. These are unknown to me 

 in any sitUAtions, except where the ntrala are so much disturbed as to render it difficult to identify the tJtica slate, in the absence of other 

 fossils ; and ii is quite pmsible ihat ihe black slate containing them is tliat rock, inlerpHcated and folded with the green slates and shaly 

 sandstones, which Utter, tn uiidisturhed regionxj consiitute the Hudiioh-river CToup proper. 



Several species of fossils from western localities (particularly of the genus Orlhia) have been referred to the period of the Trenton lime- 

 stone, though it is quite probable they may be found to range through the entire series, and to have existed a.s late as the period of the 

 HuiIiMJo-river group of New- York ; while others, peculiar lo the latter, are found only near the termination of the *' Blue limestone forma- 

 tion'' in western localities 



[ pALArONTOLOGY.) 



42 



1^ 



