552 COMPARATIVE ANATOMY AND PHYSIOLOGY. 



Ganoidei, 90 ; snout, 336 



Gastropoda; divisions, 80; diges- 

 tive tract, 135; blood-vessels, 

 191 ; gills, 221 ; lungs, 228 ; re- 

 nal organ, 255 ; foot, 380 ; go- 

 nads, 502 



Gephyrea, 56 ; digestion. 118 ; re- 

 spiration, 230 ; nephrida, 251 ; 

 gonads, 489 



Glossophora, 80 ; odontophore, 135 



Gnathopoda, -58 



Gnathostomata, 88 ; mouth, 140 



Goose ; gizzard, 164 



Gordius, 51 ; mouth, 114, 179 



Gorgonia ; zoological position, 

 44 ; figure, 44 ; skeleton, 281 



Grantia, 36 ; sense-cells, 431 



Gregarina, 25 ; reproduction, 474 



Gromia, 27 ; figure, 26 ; test, 275 



Gymnosomata, 82 



Gymnotus ; electric organs, 269 



G>mnnra; teetb, 150; stomach, 165 



Heematobranchiata, 73 



Haliotis, 81 



HaHs.rca, 35 



Hatteria, 96 ; teeth, 146 ; vertebrae, 

 315 ; iaws, 339 



Haustellata, 77 



Hedgehog ; teeth, 151 



Hedriophthalmata, 70 



Helicidse ; teeth, 134 : gonads, 502 



Heliozoa, 27, 29; skeleton, 276 



Helix, 81 



Heloderuia ; oral glands, 159 



Hemiptera, 77 ; gnathites, 132 



Hesione ; air sacs, 230 



Hesperornis, 98 



Heteropoda, 82 



Hirudinea, 56 ; sensory organs, 

 433 ; gonads, 489 



Histozoa, 24 ; nephridia, 252 



Holopus, 121 



Holothuria, 64 ; lungs, 229 ; cuvie- 

 rian organs, 268 ; skeleton, 296 ; 

 larva, 372 ; gonads, 492 



Homo, 100; erect position, 356; 

 brain, 429; scrotum, 507; ovi- 

 ducts, 519 ; teats, 522 



Horse ; teeth, 153 ; stomach, 165 ; 

 foot, 355 



Hyalea, 82 



Hy alone ma ; spicules, 279 



Hydra; figure, 36, 40; digest'ou, 

 105; chlorophyll, 272 > sense- 

 cells, 432 ; gonads, 484 



Hydractinia, 40 



Hydrocorallinse, 40 



HydromedussD, 40 ; coral, 283 



Hymempteri, 77; gnathites, 130; 



vocal organ, 389 

 Hyomoschus ; foot, 357 

 Hyrax, 99 ; caeca, 172 



Ichthyopsida, 89 



Infusoria, 29 ; digestion, 103 ; re- 

 spiration, 210 ; lorica, 278 ; cilia, 

 371 ; reproduction, 476 



Insecta; gnathites, 128; enterou, 

 133 ; salivary glands, Malpighian 

 vessels, 134 ; heart, 190 ; respi- 

 ration, 216 ; poison glands, 266 ; 

 silk glands, 567 ; appendages, 

 303 ; wings, 378 ; vocal organs, 

 388 ; nervous system, 406 ; sen- 

 sory organs, 436, 449, 439, 461 ; 

 gonads, 497, 500 ; larvae, 531 



Insectivora, 99 ; brain, 426 



Isopleura, 81 



Isopoda, 70 ; parasitic, 180 ; respi- 

 ration, 229 ; gonads, 499 



Lacerta, 96 



Lacertilia, 96 ; oral glands, 159 

 Lremodipoda, 72 

 Laganum, 63 



Lamellibranchiata, 79 ; gills, 219 ; 

 glochidia, 221 ; renal organ, 254 ; 

 byssus, 268 ; shell, 306 ; foot, 

 380 ; nervous system, 410 ; eyes, 

 457 ; ear, 462 ; gonads, 501 

 Lancelet. Sen Cephalochordata 



Leech ; mouth, 179 ; respiration, 

 212 ; nephridia, 252 ; movements, 

 373 



Lenviroidea, 100 



Lepidoptera, 77; gnathites, 131; 

 stomach, 134 



Lepidosiren, 90 ; teeth, 144 



Lepidosteus, 92 ; teeth, 144 ; air 

 sac, 235 ; ear, 465 



Lepisma, 75 



Leucon, 36 



Ligula, 50 



Limax, 81 ; shell, 305 



Limulus, 70; respiration, 225; 

 carapace, 299; eye, 451; sper- 

 matozoa, 499 



Linckia, 63 ; comet form, 494 



Lineus, 85 



Lion ; skeleton, 318 



Lipobranchiata, 74 



Lipocephala, 79 



Lizard; heart, 204; arterial ar- 

 ches, 205 ; gonads, 512 



Loligo, 83; shell, 309; spermato- 

 phore, 505 



Lophius ; teeth, 142 



