618 
Cambridge Natural History, 439 
Camillus shale, 91, 93, 106 
Canada, Geological Survey, acknowledg- 
ments to, 8 
Carapace, 30 
Carcinosoma, 18, 228, 229 
ingens, 228, 220, 245, 247 
figure, 246 
newlini, 229, 245, 247, 300 
Carcinus moenus, 75 
Catskill, 411 
Catskill beds, 16, 19, 89, 94, 110; of 
Pennsylvania, 16 
Cayuga county, 87, 89, 92 
Cephalaspis, 84, 357 
Cephalopods, 99 
Cephalothorax, 30; appendages of, 42 
Ceratiocaris, 20, 349, 379 
erandis, 16, 379 
figure, 379 
Ceraurus miseneri, 325 
Chadwick, G. H., cited, 411 
Chamberlin, T. C., cited, 96, 97, 113, 438 
Chelicerae, 43, 408 © 
Chemung beds, 17, 89, 94 
Chonetes, I00 
Clarke, J. M., cited, 17, 19, 20, 39, 43, 81, 
93, 94, 104, I10, 168, 200, 279, 292, 311, 
334, 350, 357, 435, 430, 438, 439 
Claus, cited, 139 
Claypole, E. W., cited, 16, 18, 228, 245, 
292, 435, 430, 437 
Clayville, 9 
Citmacograptus bicornis, 412 
var. peltifer, 412 
typicalis, II 
Climactichnites, 85, 86 
Clinton beds, 18, 19, 87, 93, 160 
Cobleskill formation, 93, IOI, 107 
Columbia University, acknowledgments 
to, 8 
Conchidium colletti, 99 
NEW YORK STATE MUSEUM 
Conocephalites, 34 
Conularia, 99 
Corycephalus, 291 
Crustacea, 147, 385; relationship of the 
eurypterids to, 148 
Cryptograptus tricornis, 412 
Ctenopterus, 30, 50, 130, 151, 260, 287, 
288, 297, 313, 321 
See also Stylonurus 
Cumings, cited, 99 
Cyrtoceras, 325 
Dalmanites, 291 
breviceps, 325 
Dawson, Sir William, cited, 18, 85, 86, 
113, 350, 357, 433, 430 
Delway, James E., cited, 13, 155, 227, 432 
Delaware county, 89 
Delaware Water Gap, 417 
De Lima, W., cited, 96, 436 
Delobranchiata, 137 
Dendrocrinus casei, 325 
Dicellograptus gurleyi, 412 
Dinorthis subquadrata, 325 
Dohrn, A., cited, 433 
Dolichocephala lacoana, 16, 292 
Dolichopterus, 15, 20, 28, 31, 35, 44, 49, 
51, 55, 58, 65, 70, 76, 78, 80, 81, 83, 
QO, 128, 129, 132, 133, 149, 200, 212, 
258-61, 262, 268, 270, 272, 321, 320, 
384 
sp., 201 
breviceps, 414-15, 431 
figure, 414 
frankfortensis, 22, 86, 149, 261, 268-69, 
431 
laticeps, 261 
latifrons, 22, 86, 149, 261, 269-70, 431 
macrochirus, 15, 53, 65, 69, 89, 92, 149, 
259, 260, 261, 262-68, 260, 272, 273, 
275, 278, 322, 431 
figure, 266 
mansfieldi, 425 
