INDEX 



59i 



Artery — 



iliac, 59, 450. 



innominate, 415, 449. 



internal carotid, 58, 361. 



lienogastric, 362, 450. 



lingual, 57. 



occipitovertebral, 58. 



oesophageal, 58. 



ophthalmic, 253. 



ovarian, 59. 



pectoral, 415. 



posterior carotid, 362. 



posterior mesenteric, 362, 450. 



pulmonary, 57, 391, 415. 



renal, 59, 362, 450. 



spermatic, 59. 



sternal, 254. 



subclavian, 58, 362, 449. 



suprabranchial, 336. 



ventral abdominal, 254. 



ventral thoracic, 254. 



See also Aorta, Aortic arches. 

 Arthrobranchise, 258. 

 ^Arthropods, 267, 515. 

 Artiodactyla, 465, 520. 

 Ascaris lumbricoides and A. 

 megalocephala, 295. 



alimentary canal of, 297. 



body-wall of, 296. 



excretory organs of, 297. 



generative organs of, 299. 



muscle fibres of, 297. 



nervous system of, 297. 

 Asexual reproduction. See Re- 

 production, asexual. 

 Assimilation, 6, 16, 102, 543. 

 Astacus torrentium and flwvia- 



tilis, 239. 

 Aster, 104. 



Atlas, first vertebra, 424. 

 Atriopore, 327. 

 Atrium, of Amphioxus, 328. 

 Atrium = auricle. See Heart. 

 Aurelia, 186. 

 Auricle. See Heart. 

 Automatism, 12, 16, 102, 542. 



in Amoeba, 115. 



in leucocytes, 101. 



in Paramecium, 133. 



in plants, 531. 



in protoplasm, 102. 



Autonomic nerves, 75- 

 Autotomy, in crayfish, 267. 

 *&ves, 374, 519. 

 Axis, 425. 

 Axon, 93. 



Backbone, 342. 



of dogfish, 344. 



of frog, 26, 27. 



of pigeon, 404. 



of rabbit, 422. 



of snakes, 392. 

 Bacteria, 533, 536. 

 Baer, von, law of, 510, 523. 

 Balance of nature, 536. 

 Balantidium coli and B. entozoon, 



158- 

 Bands, peripharyngeal, of Amphi- 

 oxus, 334. 

 of Ammoccetes, 377. 

 Bar, gill, of Amphioxus, 328, 



331- 



tongue, of Amphioxus, 332. 

 Barbicels, 400. 

 Barbs, of feather, 400. 

 Barbules, 400. 

 Basipodite, 241. 

 Basipterygium, 350. 

 Bastard wing, 401. 

 Batteries, of nematocysts, 163. 

 Bed bug, 287. 

 Bee, head of, 286. 

 Bees, 282, 285, 286. 

 Beetles, 282, 285, 286. 

 Behaviour, 15, 134. 



of Amoeba, 116, 134. 



of Hydra, 169. 



of Paramecium, 133. 

 Bile, 50. 

 Bile duct, 48. 



of dogfish, 354. 



of frog, 48. 



of man, 476. 



of pigeon, 411. 



of rabbit, 442. 



reflex opening of, 77, 78. 

 Binary fission, 118, 141. 

 Binuclearity, 148. 

 Biogenesis, 549. 

 Biology, definition of, 20. 



problem of, 542, 547, 



