NO. 6
MIDDLE CAMBRIAN BRANCHIOPODA, ETC.
| PAGE | |||
| Branchinecta, specimens flattened between glass plates | 169 | ||
| Branchinecta paludosa (O. F. Müller), effect of pressing | 168 | ||
| Branchiopoda, classification of | 154 | ||
| Apodidæ of, compared with Burgessia bella | 179 | ||
| Bidentia difficilis nearer to Merostomata than to | 174 | ||
| Burgessia in | 163 | ||
| Cambrian, descendants of | 166 | ||
| descent of | 160-161 | ||
| development discussed | 163 | ||
| foreshadowed by Burgess shale fauna | 165 | ||
| genera in the Cambrian | 157 | ||
| of the order Anostraca | 165 | ||
| relations of, to Leptostraca, Malacostraca, Trilobita, and Merostomata | 163 | ||
| segmentation, table of | 158 | ||
| subclass | 148, 153, 166 | ||
| survival of | 165 | ||
| mentioned | 155 | ||
| Branchiopoda and Malacostraca, compared with Waptidæ | 180 | ||
| Branchipus, specimens flattened between glass plates | 169 | ||
| Branchipus vernalis Verrill, compared with Opabinia regalis | 168 | ||
| Brock, R. W., Director of Geological Survey, Canada, acknowledgments | 204 | ||
| brocki, see Emeraldella. | |||
| Burgess, mountain and pass, British Columbia, Canada | 177 | ||
| Burgess Pass, trail to Summit Lake from | 152 | ||
| Burgess shale, crustaceans of | 149 | ||
| Naraoia compacta from | 176 | ||
| species of ostracod in | 157 | ||
| Burgess shale fauna, foreshadows living Crustacea | 165 | ||
| relation to recent crustaceans | 164 | ||
| Burgess shale fossils, mentioned | 193 | ||
| Burgess shale member, collections from | 148 | ||
| of Stephen formation | 151 | ||
| Burgessia, new genus, discussed | 177 | ||
| classification of | 154 | ||
| carapace of | 157 | ||
| compared with Lepidurus | 165 | ||
| labrum of | 158 | ||
| probable ancestor of Polyartemidæ and Apodidæ | 165 | ||
| separated from Apus | 162-163 | ||
| shield of, mentioned | 157 | ||
| stratigraphic position and association | 153 | ||
| Burgessia bella, new species | 177, pl. 27, figs. 1-3, pl. 30, figs. 3 and 4 | ||
| appendages of | 178 | ||
| carapace of | 177-178 | ||
| compared with Apodidæ | 179 | ||
| compared with Apus | 162 | ||
| compared with Naraoia compacta | 176 | ||
| eyes of | 178 | ||
| stratigraphic position and association | 152 | ||
