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 |