Hudson or| 
Trenton Period. eee ete 
Stones Black Mrenton 
tiver tiver aia 
ance Gecee: CoROMD 
as) ||]. =o] ‘2 a 5 
BRYOZOA. oe Pease US | ells ae a) my 
2g |) = SiS eal @)) 3 72 
Slealal2)s iss] s isso] o) 2 3 5 
R/2])eale]s Ise] = a | SS = z 
S(ElS\SIe/sleeleBiisisiel| = E 
|) Se | tS) | Set | Sy NS Se ES SSeS FI qa 
GI Sy SIPS) ses a iso's 2 | = = cy 
Mle |e l|n] Me] jee]o0 e4/ae]/50/8 o I=] 
Homotrypa callosa, m.Sp......:.......... 243 x | 0 T 
Prasopora simulatrix Ulrich............. 245 x x w vr 
Prasopora contigua Ulrich............... 249 Xe || 
Prasopora conoidea Ulrich............... 249 x 
Prasopora selwyni Nicholson............. 250 x 
Prasopora insularis, n. Sp..............- 251 x 
Prasopora affinis Foord................ 253 n 
Prasopora oculata Foord................. 252 n 
Prasopora lenticularis, n. sp............. 253 x 
Aspidopora parasitica Ulrich............ 255 x} Xx 
Aspidopora elegantula, n. sp............. 256 x 
Mesotrypa infida Ulrich... ............... 258 x 
Mesotrypa (?) spinosa, n. Sp.............. 259 x = 
Mesotrypa quebecensis Ami............. 259 Hl Xs i 
Mesotrypa discoidea, n. sp............... 260 x 
Mesotry pa (?)} rotunda, DEES Dricyteictatoer a 262 x 
iBythopora herrickiWilrichs...+-..-...-- 263) x 
Bythopora alcicornis, n. sp............... 264 x 
Eridotrypa mutabilis, n. sp.............. 265 x} x T 1 
Hridotrypa mutabilis var. minor, n. var..} 266 xX | xX 
Kridotrypa exigua, n. Sp................-. 266 n 
Heterotrypa prolifica Ulrich.............. 268 I R 
Heterotrypa singularis Ulrich........... 268 if R 
Dekayella preenuntia, n. sp.............. 270 x | 
Dekayella ne var. Simplex, n. var...} 27] x] x 
Dekayella sf var. nevigera, n. var..| 271 x 
DekayelJa ne var. echinata, n. var..} 271 x| xX | xX 
Dekayella Ha var. multipora, n. var] 272 x se 
Dekayia trentonensis Ulrich............. 274 X| x d 
Callopora angularis, n. sp................ 277 x 
Callopora incontroversa Ulrich........... 278 x 
Callopora undulata Ulrich. ... .......... 279 BS |] 28 - 
Callopora multitabulata Ulrich.......... 280 x Xx] XxX]? 2 a 
Calloporajamplaymespre eriasscasaseces oes 281 x | xX] XxX 
Callopora goodhuensis, n. sp............ 282 x 
CalloporalGiumalissin=;Spreschsccccsrceee.. 282 xX] x 
Callopora pulchella, n. sp................ 283 x 
Callopora pulchella var. persimilis, n. var] 284 x 
Callopora crenulata, n. sp................ 284 x{ x 
Diplotryparlimaibaris) Me Sp. secs a ce sles 286 x 
Diplotrypa neglecta, n. sp.......-....... 287 x 
Batostoma fertile Ulrich................ 290 Xx 
Batostoma magnopora, n. sp........... | 291 x 
Batostoma varium, n. Sp................. 292 x | xX 
Batostoma montuosum, n. sp............. 293 se - 
Batostoma humile, n. sp................. 294 x °T 
Batostoma winchelli Ulrich.,............ 295 es 
Batostoma minnesotense, n. sp...-.-.-- 297 28 
Batostoma (?) decipiens, n. sp............ 298 X| X 
Hemiphragma irrasum Ulrich.... ...... 299 x |X x | xX 
Hemiphragma ottawense Foord.......... 300 ak 
Hemiphragma tenuimurale, n.sp........ 301 x/n 
Hemiphragma imperfectum Ulrich...... it 
Stromatotrypa ovata, n. sp.........-..... 302 x | x 
Monotrypa magna, n. sp................. OE) = | ap ar S 
Monotrypa intabulata, n. sp. ........... 305 " 26 
Monotrypa nodosa, n. sp. ............... 306 i ~ 
Monotrypa cumulata, no. SDsooosdopscdens 307 28 
Trematopora (?) primigenia Ulrich...... 309 xs 
Trematopora (?) “var. ornata Ulrich] 310 s 
Trematopora (?) “yar. spinosa,o.var} 310 Bs 
CORRELATION OF STRATA. 
X11 
yy 
& ; 
S 3 
ra cs 
e a 
© 2 
a 'S) 
T T 
an 
an 
, 
oT T 
ae 
a 
au 
ay 
