INDEX 



553 



Hinge of bivalve shells, 267 ; teeth , 267. 



Hippocampus, 404. 



Hippopotamus, 526, 537. 



Hirudinea, 203. 



Hirudo, eyes of, 209; lateral sense- 

 organs, 209; medicinalis, 204; 

 quinquestriata, 206. 



Histology, 4. 



Hoatzin, 487. 



Hock, 538. 



Holothuria edulis, 173 ; floridana, 



173- 



Holothuroidea, 173. 



Homalogaster, 136. 



Hoof, 536. 



Hormiphora plumosa, 126. 



Horns, 537. 



Horse, 526, 538; sea, 404. 



Host, of guinea worm, 156; of para- 

 sitic worms, 134, 142, 144. 



Hound fish, rough, 366. 



Humerus, 341 ; of birds, 469. 



Hyalonema, 89. 



Hyalosphenia lata, 20. 



Hybrids, 3. 



Hydatids, 143. 



Hydra, 73, 96, 99, 100. 



Hydranths, 91. 



Hydrocorallina, 104. 



Hydrophyllia, 108. 



Hydrotheca, 91. 



Hydrozoa, 90, 91. 



Hydrula, 98. 



Hyla, 432. 



Hyoid apparatus of birds, 468; of 

 frog, 411 ; of mammals, 500. 



Hypopharynx, 244. 



Hypophysis cerebri, 354, 380. 



Hyposternum, 443. 



Hypostome, 92. 



Hyrax, 526, 539- 



Hystricidae, 541. 



Ichthyomyzon, 365. 

 Idyia roseola, 128. 



Ilium, 342; of birds, 470, 476; of frog, 

 416; of mammals, 503. 



Imago, 251. 



Incisor teeth of rabbit, 491. 



Incubation, 483, 490. 



Infundibulum, 127, 354, 380; of 

 brain, 513, 517. 



Infusoria, 45. 



Ink gland of Cephalopoda, 306. 



Ink sac of Cephalopoda, 306. 



Insecta, 241; abdomen, 242; head, 

 242: thorax, 242; appendages of 

 head, 242; of thorax, 242; muscu- 

 lar force of, 252. 



Insectivora, 526, 541. 



Interclavicle, 445. 



Intestine of vertebrates, 374, 418, 447. 



Introvert, 289. 



Ischium, 342; of bird, 470; of frog, 

 416. 



Itch mite, 260. 



Jaws, of Cephalopoda, 304 ; of leech, 

 205; of Peripatus, 239 ; of starfish, 

 159; upper, of frog, 410; of verte- 

 brates, 343. 



Jellyfish, 90. 



Jerboa, 541. 



Kangaroo, 525, 529. 



Kidneys, of birds, 481 ; of frogs, 427 ; 

 of mammals, 518 ; of molluscs, 275, 

 283,295; of vertebrates, 358, 384. 



King crab, 260, 263. 



Kiwi, 483. 



Koala, 531. 



Labia majora, 521. 



Labrum, of Arachnida, 256; of in- 

 sects, 242; of Limulus, 262; of 

 Myriapoda, 240. 



Lacerta viridis, 330. 



Lachrymal bones, 500. 



Lachrymal foramen, 500. 



Lacrymaria, 49. 



Laemaigus, 393. 



Lagena, 25. 



Lamellae of molluscan gills, 272, 274. 



Lamellibranchiata, 265. 



