560 INDEX 



Ccraurus — Continued. page 



pleurexanthemus — Continued, 

 figured 



pi. 100 ; figs. 1, 2, 6, 9 : 448 



pi. 101 ; fig. 8 450 



pi. 102 ; figs. 1-10 451 



pi. 103 ; figs. 3-9, 11 452 



pi. 104 ; figs. i-S 454 



text fig. 16 384 



exopodite of 412 



limbs 149, 150, 166 



compared with Neolenus, Anaspidcs, Koonunga, and 



Paranaspides 207 



Chaetomorpha clavata (Agardh) and other species, compared 223 



Chancelloria Walcott, described 327 



compared 326 



drusilla Walcott, described 331 



figured, pi. 87, figs. 2, 2a-e 361 



eros Walcott, described 329 



figured, pi. 86, figs. 2, 2a-c; pi. 88, figs. 1, la-f 360, 362 



libo Walcott, described 332 



figured, pi. 87, figs. 1, la 361 



yorkensis Walcott, described 332 



figured, pi. 87, fig. 3 332 



Chancelloridae Walcott, family described 327 



Chepultepec formation 468, 469 



fauna 468 



Chetang formation 10, 22 



fauna in Montana 24 



limestone fauna 22 



Chisholm shale, reference 8 



Chlorophyceae, genera and species listed 222 



Choia Walcott, described 291 



carteri Walcott, described 292 



figured, pi. 72, fig. 4 ; pi. 73, figs. 1, la, b; pi. 75, fig. 2. .346, 347, 349 



compared with Hamptonia 298 



Habella (Hicks), from Menevian formation 291 



hindei (Dawson"), described 295 



figured, pi. 76, figs. 1, la 350 



ridleyi Walcott, described 294 



figured, pi. 73, figs. 2, 2a; pi. 74, figs. 1, la 347, 348 



utahensis Walcott, described 295 



figured, pi. 75, fig. 1 349 



Chrotella macellata, compared 313 



Chushina formation (Ozarkian, Lower) w 458 



fauna 458, 473 



Cirripedia, relation to Trilobita 168 



Cladophora arcta (Dillw.) Kiitzing, compared 223 



fracta ( Vahl) Kiitzing, compared 223 



gracilis (Griffiths) Kiitzing, compared 223 



Climacospongia Hinde, from Silurian 269 



Copepoda, relation to Trilobita , 168 



