SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



PAGE 



Habel, mountain peak, British Columbia, Canada 202 



Habelia, new genus, described 201-202 



between Branchiopoda and Merostomata 163 



characterized 1 58 



classification of 155 



representing Merostomata 155 



Habelia optata, new species 202, pi. 29, fig. 6 



appendages of 202 



resemblance to Yohoia tenuis 202 



Hepatic caeca, described 160 



of Burgessia bella 179 



of Naraoia compacta 176 



Hepatic tubes 160 



Holothurians, mentioned in second paper 148 



Holothurioidea mentioned 149 



Hurd, mountain in British Columbia, Canada 186 



Hurdia, new genus, discussed 186 



classification of 154 



mentioned (footnote) 154 



Hurdia triangulata, new species 186, pi. 34, fig. i 



stratigraphic position and association 153 



Hurdia victoria, new species 186, pi. 32, fig. 9 



stratigraphic position and association 153 



Hymenocaridae Salter 182 



classification of 154 



Hymenocarina Clarke 182 



bivalve stage of 157 



classification of 154 



descendant from Branchiopoda 164 



order of, in Ordovician, Silurian, and Devonian 155 



Hymenocaris Salter, discussed 183 



bivalve carapace of 157 



classification of 154 



compared with Nebalia 165 



distributed in lower half of Middle Cambrian 155 



of Leptostraca 163 



rami, segmentation, and cercopods 159 



synonymy of 182-183 



mentioned I55 



Hymenocaris ? circularis, new species 184, pi. 32, fig. 4 



stratigraphic position and association 153 



Hymenocaris obliqua, new species 185, pi. 32, figs. 1-3 



stratigraphic position and association 153 



Hymenocaris ovalis, new species 185, pi. 32, figs. 5 and 6 



stratigraphic position and association I53 



Hymenocaris ? parva, new species 185, pi. 32, fig. 7 



stratigr.'iphic position and association I53 



