54 8 



INDEX 



Helix nemoralis, 115. 



Heloderma (Gila), 370, 371; H. 

 suspectum, 371. 



Hemilastena ambigua, 446. 



Hemiptera (Homoptera) (Rhyn- 

 chota), 64, 276, 277. 



Hemoglobin ; see Haemoglobin. 



Hemosporidia, 201. 



Henry, 523-527. 



Henslow, John Stevens, 104. 



Heredity: alcohol vs., 120-128; 

 ^nature and nurture vs., 89-93 ' 

 protozoa vs., 194-198. 



Hermaphrodites, 78. 



Hernandez, Francisco, 308. 



Hesperornis, 154, 379. 



Heteroptera (Hemiptera), 277. 



Heterozygous (cross-bred) individ- 

 uals, 46, 57-61, 67, 72, 84, 85, 127, 



133, 134, 5 OI > 54- 

 Hiort, 478. 



Hippopotamidae, 410; hippopotamus 

 amphibius, 411. 



Hirudinea, 181, 237, 241; hirudo 

 medicinalis, 241. 



History, of life, 144-156; vs. biology, 

 492-499 ; see also Life. 



Holarctic Region, 450. 



Holland, W. J., 292. 



Holmes, 516. 



Holocephali (Chimaeras), 343. 



Holothuroidea, 222, 224; see also 

 Synapta. 



Holt, Caroline M., 63. 



Hominidse, 175-176, 434, 435, 438; 

 Homo, 175, 176; H. Cro-Magnon, 

 422, 441; "H. diluvii testis," 

 360; H. heidelbergensis, 440; 

 H. neanderthalensis, 440; H. 

 sapiens europaeus : see below. 



Homo sapiens europaeus (man), 175, 

 176, 341; ancestry, 429; char- 

 acters of, 435-438; diseases vs. 

 development of, 489-491 ; eu- 

 genics vs., 500-507; evolution of 

 (protozoan to hom.inid.cz an stages), 

 4 2 9-434; history vs., 492-499; 

 relatives of, 438-441; sociology 

 vs. biological viewpoint, 530-534. 



Homology of organs, etc., 138. 

 Homonyms vs. synonyms, 174. 

 Homoptera, 277. 

 Homozygous (pure-bred) individuals, 



46, 56-61, 67, 117, 127, 134, 504. 

 Honey ants, 304. 

 Honeybees, 296. 

 Hooker, Sir Joseph, in. 

 Hookworm ; see Nematoda. 

 Hormones, 87. 

 Horns, 23. 

 Horse (Equus), 417-425; Equus 



asiaticus, 424; E. burchelli granti, 



415; E. caballus, 422; E. celticus, 



423; E. przewalskii, 421, 422, 



423; E. scotti, 418, 421. 

 Hosts, of parasites, 201-206, 231. 

 Howard, L. O., 279. 

 Hudsonian Life Zone, 457. 

 Humblebees, 296. 

 Humboldt, Alexander v., 512, 514. 

 Humerus, 332. 



Humid Northwestern Area, 460. 

 Huronian Period, 148. 

 Huxley, T. H., 112, 341, 429, 522. 

 Hyatt, 516. 

 Hybridization, 42-44, 119; see also 



Mendel, G. J. ; Mendelism. 

 Hydatina senta, 236. 

 Hydra, 73, 212; H. oligactis, 213. 

 Hydrochloric acid, 20. 

 Hydrogen, 31. 



Hydromedusae ; see Hydrozoa. 

 Hydrophobia (rabies), cure for, 487. 

 Hydrotheca, 214, 215. 

 Hydrozoa (Hydromedusae), 213-215; 



Hydra, 73, 212; hydrotheca, 214, 



215. 

 Hyaenidae, 401. 

 Hyenas ; see Hyaenidas. 

 Hylidae, 363. 

 Hymenoptera, 95, 274-275, 276, 282; 



ant, 299-307; bee, 293-298; see 



also Ant; Bee. 

 Hypoblast (Endoderm), 210. 

 Hypsodon (Portheus), 348. 

 Hyracotherium, 421. 



[cerya purchasi, 309. 



