TABLE OF SPECIES. 329 
ee ee ee eee as Se Sane | 
Rocxs & GRovps. 
she] a] altel} che 
SILI FE Slele/e se 
alal/S§j/eloels|o)2 
aleySl|arprloa| Pe) @ 
Sle s|Slelolals 
Bl SleiopS/ 2) m1 a 
GENERA AND SPECIES. Plate and figure. | Page. |%/¢|B)xlo 5 o|s- 
a oO 
Sl21/o|S)els| ls 
ale] |sis|?| ( 
1 Conularia trentonensis, Hall ....... | lix, 4a-f 222 le ale sq iellatelecei tee 
2 —  granulata, ‘“ .......-| lix, 54,6 223 |eclesfes|erfee[tleslee 
3 — papillata, se veeecee- |? Lx, 6a, b B98 |. a lewlecs«|oe|t|es |e 
4 — gracilis, ce Gee cal tb cy aL CIN) 994 |.cl..fesleeleo|tleol]e- 
1 Theca triangularis, GS secs ee| IxxxVvI, 1 @=.d S13 roles teed ev tec lee lols 
CRUSTACEA. é : 
1 [llenus arcturus, sé wis Sotessiats {ic AVC DIS) 5 L 23 Jeefee|H]e-|eee-feele> 
2 — _crassicauda? Wahlenberg ..| iv (bis), 13 >) tae Pare (oe be a el 
i 3 — crassicauda, ‘‘ Stkcewecle Ix, a tamd 220 |eeleefesfer|..[+]-<]-- 
4 —  trentonensis, Emmons..... | 1x, 5 230 |--|e-|e-[erfee|tl-slee 
5 = latidorsata, Hall .......---.| 1x, 64,6 930 |e-leele.|e+te (tle 
1 Thaleops (Illenus) ovatus, Conrad ..| Ixvil, 6a-c 959 |--leel..|e-]--[Pl--|-- 
1 Asaphus? obtusus, Hall .....| iv (bis), 14 Q4 Jao lee|tl--|oe]e-fer]e> 
2 — marginalis, ee Racial, 2V CDIS)\2 Lp 24 faolee|tyes}e.|eeter 
3 —?- extans, ee eicate on Nieelscead Qs Qea 998 Jools. [Aleelesleeles 
4 —?  nodostriatus, CG SrtA hand bo pel at ON) GAR lool -fen|e<lee|-les ¢ 
5 —? latimarginata, “ Peo eials Slevin ae r0 Sys el el iogl Bie ao [oe foc el ee 
1 Isotelus canalis, Conrad ........+++| iv (bis), 17, 18,19 | 25 erler|tyec[ee|er|ece- 
2 — gigas? Dekay..ocrsscereees iy Osh 18. 7 25 [ecles|tleslesieciories 
x, 7; Ix, 3, 
Be ae PICOdi EE Ace, Seine Sia 35 ti i a we[eefaefee]ee EHH 
lxvi, 5 254 
1 Ogygia? vetusta, TU aie siotetel|! Sala 0 997 |e-feeles|Hl..|- oe efor 
1 Acidaspis trentonensis, ‘‘ esees| Ixiv, 4a-f 240 Jerlesferles[ee|tleeles 
2 —_ spiniger, ss Giles. al LXIVig? oD 2d] fooler lester} |4]--]-- 
1 Platynotus trentonensis, Conrad.....| lxiv, la-e 935. |e-ler|eel--fee|tleel- 
1 Ceraurus? sp. indet. .......++++e++:| iv (bis), 20 25 fools [les [ealselentes 
2 — _ pleurexanthemus, Green.... meat Ban ee i 242 \er|-=[ee|s-|ee|#leele> 
3 _ vigilans, Hall v0.0.0] IV, 2 ah 245. \eele+|e|ee|e-|4-fe> 
4 — pustulosus, se BOErOn elb-ahy PL ey) 246 |r-leefes|erlee|tleelee 
1 Calymene multicosta, Os Adak teres |ENPIKG INO: 903 |ee|--|-e|H]--]eefee|-> 
Ixiv, 2a-e 237 
2 —_ beckii, Green . ......4. «Sis Q2a-k oo weil Spoil icie|| Stott aval t= Ft lots 
lxvil, 4a-e 
3 —  senaria, Conrad. .......-+.| Ixiv, 3a-m 238 ferfe- f+ =e e[e+ [PELE 
4 —_— (SPL ANEt.) i aia estes ine vvee | IXVI,, Oca, 0 253 [eelerleeterfes|-- tele 
1 Phacops cellicephalus, Hall ......| Ixv, 3a -% 247 |rrfeefertsstes|les [ee 
2 —?  laticaudus, ss Veeco ol) DIK sg 3 24g |r-ler|--feefee|tle-|e> 
1 Trinucleus concentricus, Katon...... S Tvii, an on aaa eel eae Sea ao 
1 Olenus asaphoides, Emmons.........| Ixvil, 2a-e DB Onesie ties [tsa teenel orl soa ete Ste 
2 — undulostriatus, Hall,.......| Ixvii, 34,6 958) [listetleclen |e [ee + 
1 Agnostus lobatus, ss Neliee el xVvingw Ocala fF OY =~ ti foe baal kate fees eefee|+ 
1 Cytherina (sp. indet.) .........+....|, x, 12 pcs ioral eile tal ensil ailes (ner oye 
Nore. Several species of Graptolithus are marked as occurring in the shales of the Hudson-river group’only. These are unknown to me 
in any situations, except where the strata are so much disturbed as to render it difficult to identify the Utica slate, in the absence of other 
fossils ; and it is quite possible that the black slate containing them is that rock, interplicated and folded with the green slates and shaly 
sandstones, which latter, in undisturbed regions, constitute the Hudson-river group proper. 
Several species of fossils from western localities (particularly of the genus Orthis) have been referred to the period of the Trenton lime- 
atone, though it is quite probable they may be found to range through the entire series, and to have existed as late as the period of the 
Hudson-river group of New-York; while others, peculiar to the latter, are found only near the termination of the ‘‘ Blue limestone forma- 
fion’’ in western localities. 
’ | Patzontotoey.] 42 
