188 IND 



B. obtusirostris 66 



B. striata 66 



Bradya, Genus 184 



Bythotrephes 122 



Calaniclte, Family 129 



Caligus 18 



Calyptomera, Sub-order 15, 18 



Camptocercus, Genus 81 



C. biserratus 83 



C. latiiostris 84 



C. lilljeborgii 84 



C macrurus 83 



C. rectirostris 84 



C. rotundus 84 



Canthocamptus, Genus 164 



C. brevipes 169 



C. crassus 169 



C. frontiualis 174 



C. gracilis 168 



C. hibernicus 172 



C. illinoisensis 170 



C. minnesotensis 173 



C. minutus 170 



C. northumbricus 169 



C. palustris 173 



C. staphylinus 172 



C. tenuicaudis and trispinosus . . 169 



C. pygmiieus 174 



Carpenter's gelatine 179 



Ceriodaphnia, Genus 35 



C. alabamensis 38 



C. consors 40 



C. cristata 37 



C.dentata 38 



C. laticaudata 39 



C. megops 36 



C. nitida 41 



C. pulchella 37 



C- punctata 39 



C. quadrangula 40 



C. reticulata 38 



C. rotunda 37 



C. scitula 40 



C. textilis 41 



Chydorus, Genus 115 



C. albicans 118 



C. cffilatus 117 



EX. 



Page. 

 C. globosus 116 



C. latifrons 118 



C. latus 117 



C. nitidus .117 



C. ovalis 117 



C. piger 118 



C. sph?ericus 116 



Circulatory system of Daphni- 



dre 23 



Circulatory system of Cantho- 

 camptus 166 



Cladocera, Order 13 



Copepoda, Order 124 



Corethra, A new species of 10 



C. appendiculata 11 



C. plumicornis 10 



Corj'C8eus, Genus 185 



Ctenopoda, Tribe 18 



Crustacea, Distribution of fresh- 

 water 1, 6, 7 



Cucullanus elegans 9 



Cyclopidse, Family 143 



Cyclops, Genus 144 



C. abyssorum 149 



C. adolescens 161 



C. sequoreus " 163 



C. afflnis 161 



C. agilis 157 



C. albidus 153 



C. annulicornis 153 



C. ater i45 



C. bicolor 160 



C. bicuspidatus 151 



C. bisetosus 151 



C. brevicaudatus 147 



C. brevicornis 145 



C. brevispinosus 148 



C. canthocarpoides 161 



C. capillatus 156 



C. clausii 153 



C. coronatus 153 



C. crassicaudis 156 



C. crassus 1 46 



C. crassicornis 162 



C. diaphanus 157, 160 



C. elegans 158 



C. elongatus 144 



