1 88 U trick on Correlation of the Lower Silurian. 
310 " mllleri Hall 
311 " multignima Miller 
312 " perangulata Hall . 
313 Hellcotoma helena Billings 
314 Trochoueraa ambigiia Hall 
315 Cyclora depressa Ulrich 
31G 
317 
318 
319 
320 
321 
322 
S23 
324 
325 
328 
327 
328 
329 
.330 
331 
332 
333 
334 
335 
336 
337 
338 
339 
340 
341 
342 
343 
344 
345 
34<i 
347 
348 
349 
350 
351 
.352 
353 
.354 
355 
S56 
357 
358 
359 
-360 
361 
862 
363 
364 
865 
366 
367 
868 
469 
370 
371 
372 
373 
hoffmani Miller 
miuuta Hall 
parvula Hall 
Holopea obliqua? Hall 
" paludina formis Hall 
Cycloneiua bilix Conrad?° 
" cineiiiiiatieiisis Miller 
" conicum Miller 
" fluctuatum James 
" transversum Ulrieh 
" pyramidatum James 
" n sp 
Metoptoma fissicosta Ulrich 
•' n. sp 
Conularia formosa M. and D 
trentonensis Hall 
Hyolithes americanus Billings 
Orthoceras amplieameratum Hall 
" dyeri Miller 
fosteri Miller 
crebriseptum Hall 
transversum Miller 
Endoceras proteitorme Hall 
Gomphoceras eos H. and W 
" cincinnatieneis Miller 
Trocholites ammonius Conrad 
Ti'ochoceras baeri M. and W 
Cyrtoceras couoidale Wetiierby 
" lysander Billings 
" valandinghanii Miller 
Ambonichiacarinata Ciold fuss 
casei M. and W I 
intermedia M. and W | * 
? jamesi Meek 
robusta Miller 
?* 
n, sp. 
Anomalodonta alata Meek 
" gigantea Miller 
TelUnomya alta M. and W 
hilli Miller 
obligua Hall 
pectunculoides Hall 
Lyrodesma cincinnatiensis Hall 
postriatum Emmons 
planum Conrad 
Lyrodesma major Ulrich 
Cycloconcha mediocardinalis Miller 
" (Anodontopsisj mllleri Meek. 
Cypricai'dites hainesi Miller — 
" guadrangularis Whitfield 
" ?sterlingeiisis M. and W 
Cleidophorus elliptieus Ulrich 
" fabulus Hall 
" plana latus Conrad 
Cuneamya curta Whitfield 
" elliptica Miller 
" miamiensis H. and W 
" neglecta Meek. 
" The genus Cyclonetna is represented by numerous species in the Cin- 
cinnati roclcs which are usually thrown together under Conrad's name 
C. bilix. The form here indicated by the name is figured by Meek in vol. 
£ of the Ohio Pal., pi. 13, figs. %a-Sd. 
