272 



INVERTEBRATE ZOOLOGY 



Incurrent canals, 83 

 Incus, 140 



Indeterminate cleavage, 14 

 Inermia, 158 

 Infrabasals, 180 

 Infusoria, 49 

 Ink sac, 198 

 Insecta, 205, 236, 252 

 Interambulacral, 168, 175 

 Internal buds, 8 



International commission on nomen- 

 clature, 3 

 Interradii, 96 

 Intromittent organ, 18, 76 

 Introvert, 160, 190 

 Invaginated development, 247 

 Invertebrates, 1 

 Iota, 133 

 Irritability, 66 

 Ischnochiton, 201 

 Isogametes, 9 

 Isopoda, 222, 223 

 Isoptera, 251 

 Isospora, 45, 57 

 Isotropic, 66 

 Itch, 229 



Jellyfish, 88 

 Jennings, H. S., 28 

 Joenia, 56 

 Julus, 233, 234 



K 



Kala-azar, 37 

 Karyosomes, 26 

 Keber's organ, 189 

 Kerona, 57 

 Keyhole urchin, 177 

 Kinetic elements, 31, 34 

 Kofoid, C. A., 31 

 Krohnia, 147, 157 



Labial palpi, 239 

 Labium, 239 



Labrum, 239 

 Lacrymaria, 57 

 Lacunae, 204 

 Lamp shells, 162 

 Lampsilis, 201 

 Land crabs, 205 

 Land snails, 192, 195 

 Laqueus, 164 

 Larva, 16, 236 

 Lasmigona, 191 

 Lateral line, 129 

 Laurer's canal, 114 

 Law of priority, 3 

 Leda, 201 

 Leeches, 153 

 Leidyana, 44 

 Leishmania, 37, 56 

 Lemnisci, 135 

 Lepas, 215, 223 

 Lepidochiton, 201 

 Lepidoderma, 143 

 Lepidonotus, 151, 157 

 Lepidoptera, 251 

 Lepidurus, 211, 222 

 Leptasterias, 173, 182 

 Leptocardii, 1 

 Leptodora, 211, 222 

 Leptolinae, 102 

 Leptomedusae, 102 

 Leptoplana, 125 

 Leptosynapta, 182 

 Leptotheca, 48, 57 

 Lernaea, 222 

 Leucilla, 83 

 Leuckart, 88 

 Leucocytozoon, 57 

 Leucon, 83 

 Leucortis, 87 

 Leucosolenia, 83, 87 

 Libinia, 223 

 Ligula, 117, 122, 126 

 Lillie, Frank, 168 

 Limax, 197, 201 

 Limnadia, 211, 222 

 Limnetus, 211, 222 

 Limpets, 192, 194 

 Limulus, 226, 234 

 Linckia, 182 

 Lines of growth, 186 



