826 



INDEX. 



487 



276 



9 



265 



1'AGE 



Armadillo (Crustacean) . . 291 

 Armadillos . . . .727 

 Arrow-worms . . . 232 

 Artemia . . . 284, 285 

 Arterial- arches of Vertebrates 486 

 ,, system. See Vascular 



system. 

 ,, ,, of embryo of 



higher Vertebrates 

 Arthrobranchs of crayfish 

 Arthropoda, classes of . 



,, general characters 



of ..... 



Arthrostraca . . . 284, 291 



Articular . . . 462, 637 



Artiodactyla . . . . 730 



, , and Perissodac- 



tyla contrasted . 

 Ascaridre 



Ascaris . . . . 190, 

 Ascetta .... 

 Ascidia. 

 Ascidiacea 



Ascon type (of sponge) . 

 Asellus .... 

 Asexual reproduction 

 Aspidocotylea 

 Aspredo 

 Astacus 266-282 



730 

 189 

 191 

 123 



425 

 437 

 124 



291 



54 

 178 



Asteracanthion 



Asterias 



Asteroidea 



Astropecten . 



Astrophyton . 



Astrorhizid^j . 



Atavisms or reversions . 



Atax .... 



Ateles .... 



Athecee 



Atlanta 



Atlas vertebra 



Atrial cavity . 



Atriopore of Amphioxus 



Attidse .... 



Atypus .... 



Auchenia 



Auditory capsules of skull 



Auditory nerve 



,, organs of Insects 

 Aulostoma 



427 



242 

 242 

 241 

 247 

 249 

 1 06 

 86 



357 

 766 



596 

 401 



675 

 445 

 445 

 356 

 35 6 

 733 

 459 

 472 

 327 

 232 



PAGE 



Aurelia . . . 146, 164 



,, life history of . .150 

 ,, relatives of . .152 

 Auricularia (of Holothuria) 256, 262 

 Australian region . . . 804 

 Autostylic .... 564 

 Autozooid . . . .160 

 Aves (see Birds) . . . 625 

 Axial skeleton (see Backbone) 458 

 Axifera . . . .160 



Axis vertebra . . -675 

 Axolotl . . . 586, 588 

 Aye-Aye .... 763 

 Azygobranchs . . .401 



BABIRUSA .... 732 

 Baboons .... 767 

 Backbone .... 458 

 Bactrites . . . -413 

 Baculites . . . -413 

 Badger. . . 755 



Balaena ..... 747 

 Baloenoidea .... 747 

 Balaenoptera .... 747 

 Balanoglossus . . 416-422 



,, Vertebrate char- 

 acters of . . . .421 

 Balanus . . . 284, 289 



Baleen 747 



Bandicoot .... 723 

 Barbary ape .... 77 

 Barbule .... 529 

 Barnacle . . . .287 

 Basitemporal . . . 626 



Batoidei . . . -547 



Bats 759 



Bdellostoma .... 500 



Bears 755 



Beaver ..... 749 



Bees 316 



Beetles 344 



Belemnites . . . . 413 

 Belinurus . . . .361 



Beroe 165 



Bilateral symmetry . . 35 

 Bile .... 28, 782 

 Bilharzia . . 179 



Bionomics- 

 Birds . . .653 

 Ccelentera . .167 



55 



55 



