486 



INDEX 



neo- tropical, 321; paleo-trop- 

 ical, 321; Patagonian, 322. 



Realms, geographic organisms, 318. 



Reason, 443. 



Recognition marks, 420. 



Record, Zoological, 14. 



Redfield, C., 106. 



Reflexes, 426. 



Regeneration, 285; of blastula of sea- 

 urchin (illus.), 287; of earth- 

 worm (illus.), 284; of eye of 

 triton (illus.), 287; of flatworm 

 (illus.), 285; (illus.), 286; of 

 Hydra viridis (illus.), 282; of 

 lizard (illus.), 286; of starfish 

 (illus.), 283; of Stentor cceruleus 

 (illus.), 282. 



Remora, commensal life with shark 

 (illus.), 370. 



Reproduction, by budding, 215; by 

 sporulation, 215; excess in, 58. 



Resemblance, general protective, 

 406; special protective, 411; 

 variable protective, 407. 



Reversion, 166. 



Rhizobius ventralis (illus.), 366. 



Rhodites rosce, galls produced by 

 (illus.), 341. 



Robinson, L., 461. 



Rocks, sedimentary, how deposited, 

 293. 



Romanes, G., 109, 461. 



Roux, W., 70. 



Riickert, 272. 



Sacculina (illus.), 365; carcinus, 



parasite of crab (illus.), 358. 

 Salamander, blunt-nosed (illus.), 20; 



cell fission of (illus.), 255. 

 Salix auritax purpurea, variation 



in stamens of (illus.), 160. 

 Salmo irideus (illus.), 343. 

 Salmon, quinnat, egg-laying of, 59. 

 Saltation, 54. 

 Samia ceanothi, cocoon of (illus.), 



332. 

 Sarcoptes scdbei (illus.), 363. 



Scale, black (illus.), 366; cottony 

 cushion, 62, 64. 



Sceloporus undiilatus (illus.), 18. 



Schaffhausen, 46, 464. 



Schistocerca, species of, from Gala- 

 pagos Islands, showing varia- 

 tion (illus.), 313. 



Schmidt, P., 346. 



Scorpion (illus.), 331. 



Skulls of two breeds of fowls (illus.), 

 88. 



Scutellista cyanea (illus.), 366. 



Sea anemone, anatomy of (illus.), 

 36, 



Seal, fur, family of (illus.), 440; 

 killed by parasitic worm (illus.), 

 357. 



Sea-urchin, egg cell of (illus.), 248; 

 larva of (illus.), 275; regenera- 

 tion of blastula of (illus.), 287. 



Segregation, 53. 



Selection, artificial, 51, 80; artificial, 

 its relation to evolution, 106; 

 claimed importance of, 50; 

 natural, 57; sexual, 51, 57, 71; 

 sexual, criticisms of, 77; sexual, 

 experimental stage of, 79. 



Selenka, 460. 



Self-defence, instincts of, 433. 



Semper, C., 131. 



Separation, 53. 



Serpent star (illus.), 14. 



Scrphus, carrying eggs (illus.), 340. 



Sex, 211, 220; cells, 218; determina- 

 tion of, 170. 



Sexes, numerical relations of, 170. 



Sexual, secondary characters, 72. 



Sheep, artificial selection of, 81; 

 Dorset (illus.), 83; Merino (il- 

 lus.), 85; polled Welsh (illus.), 

 83; Rocky Mountain (illus.), 

 382; Southdown (illus.), 84. 



Shelford, 423. 



Silkworm moth, development of 

 (illus.), 236. 



Silkworms, experimental rearing of, 

 150. 



