INDEX 



271 



H 



Haeckel, 255 



Haemocoel, 204 



Haemogregarina, 57 



Haemonchus, 136 



Haemopis, 158 



Haemosporidia, 45 



Hair snakes, 128 



Haliotis, 196, 201 



Halosj'dna, 157 



Halteres, 241 



Halteria, 57 



Haliclystus, 96, 102 



Haplobothriuni, 122 



Haploid, 12 



Haplozoon, 56 



Harpes, 201 



Harvest men, 226, 230 



Head, 109, 145, 184, 192, 197, 203, 



218, 236, 239, 241 

 Head capsule, 238 

 Heart, 204, 211 

 Hectocotj'lization, 199 

 Heliozoa, 40, 57 

 Helix, 197 

 Helodrilus, 153, 157 

 Hemelytra, 241 

 Hemigrapsus, 223 

 Hemiptera, 251 

 Henneguya, 48 

 Henricia, 172, 174, 182 

 Hepatopancreas, 207, 220 

 Heredit}' in Protozoa, 27 

 Hermaphroditic gonad, 10, 75, 195 

 Hermaphroditism, 10, 75, 205 

 Heterocoela, 87 

 Heterocyemidae, 60 

 Heterodera, 136 

 Heterometabola, 237 

 Heteronemertini, 126 

 Heteronereis, 149 

 Heteronomous metamerism, 203 

 Heteropoda, 196 

 Heterosomes, 13 

 Heterotricha, 50, 57 

 Hexactinellida, 87 

 Hexacoralla, 98 

 Hinge ligament, 186 



Hirudinea, 153, 157 



Hirudo, 156, 158 



Histogenesis, 237, 249 



Histological differentiation, 20, 60 



Histolysis, 249 



Holometabola, 236, 237 



Holothuroidea, 166, 177, 182 



Holotricha, 57 



Holozoic, 24, 34 



Homalonotus, 210 



Homarus, 223 



Homocoela, 87 



Homolecithal, 14 



Homonomous metamerism, 148, 203 



Hormiphora, 102 



Horse-shoe crabs, 225 



Hubrecht, 260 



Hyallela, 222, 223 



Hyalonema, 87 



Hydatina, 143 



Hydra, 90, 93, 102 



Hydrachna, 234 



Hydrachnida, 229 



Hydractinia, 102 



Hydrocoel sacs, 166 



Hydrocorallina, 102 



Hydroid, 88 



Hydroides, 152, 157 



Hydromedusa, 91 



Hydrophobia, 55 



Hydropolyp, 91 



Hydrorhiza, 91 



Hydrotheca, 94 



Hydrozoa, 89, 91, 102 



Hymenolepis, 121, 122, 126 



Hymenoptera, 251 



Hypermastigina, 56 



Hypodermis, 128, 203 



Hypopharynx, 238 



Hypotricha, 52, 57 



Ichthyophthirius, 49 

 Idotea, 222, 223 

 Imaginal buds, 237, 249 

 Imago, 236 



Implantation cone, 67 

 Inarticulata, 162, 164 



