

INDEX 



(In using this index consult, for a given animal, both the sci- 

 entific and common names.) 



abdominal ribs, 141 

 abomasus, 292 

 achselbogen, 251 

 acinous glands, 97, 112 

 Acipenser, 171 

 acoelous vertebrae, 131 

 acoustic hairs, 467 

 acoustic maculae, 409 

 adenoid tissue, 362 

 afferent nerves, 408, 435 

 air-bladder, 270, 310, 311 

 air-cells, 314 

 albatross, 478 



alimentary canal, 258, 259, 260, 

 261, 262, 263, 264, 265, 266, 298, 



299, 365 



alisphenoids, 148 

 allantoic arteries, 70, 71 

 allantoic veins, 70, 71 

 allantois, 70, 71, 322, 323, 324, 347, 



377, 378 ^ 



alveoli, of jaws, 273 

 alveoli, of lungs, 314 

 Amblypoda, 38 

 Ammocoetes, 477 

 Ammon's horn, 417 

 amnion, 70, 71 



Amniota, 19, 70, 78, 174, 373, 375, 



378, 383, 384, 385, 393, 427, 457 

 amniotic fluid, 70, 71 

 amphibians, no, 148, 166, 170, 172, 



174, 178, 200, 202, 203, 220, 237, 



239, 245, 253, 271, 272, 283, 285, 



288, 291, 294, 296, 308, 310, 319, 



322, 328, 331, 344, 346, 347, 352, 



353, 356, 358, 369, 375, 383, 385, 



392, 398, 409, 415, 416, 419, 425, 



427, 439, 444, 456, 464, 465, 469, 



amphibians (Continued} 

 472, 479, 484, 488, 489, 491, 504, 

 5i8 



amphiccelous vertebras, 127 



Amphioxus, 24, 26, 27, 28, 29, 44, 

 59, 61, 63, 66, 67, 76, 123, 143, 

 152, 154, 162, 163, 200, 260, 267, 

 289, 290, 303, 305, 306, 353, 365, 

 411, 432, 436, 443, 445, 460, 461, 

 476, 503, 515, 517, 52i, 525, 526, 

 527, 528, 529, 531, 533, 534, 537 



amphirrhine condition, 476 



Amphiuma, 305, 313 



amplexation, 383, 397 



ampullae, of semicircular canals, 487 



ampullae, of slime canals, 471 



anal fin, 164 



anal sacs, 113 



Anamnia, 70, 78, 384 



Anarrhichas, 489 



Ancylopoda, 38 



angulare, 156 



annelids, 368, 460, 512, 513, 514, 

 515, 517, 518, 519, 520, 524 



annelid theory of vertebrate ances- 

 try, 513, 520 



ansa hypoglossi, 458 



ant-eater, 316, 393 



anterior girdle, 130 



anthropoids, 38, 41, 43- 45, 9, 214, 

 226, 230, 251, 256, 298, 409, 447, 

 480, 496, 500, 504 



antitropists, 244 



antrum of Highmore, 482 



Anura, 31, 220, 313, 355, 486, 493, 



495 



anus, 258, 259, 296 

 aorta, aortae, 320, 326, 339, 351, 354 

 apes, 45, 214, 223, 229, 253, 297, 



390 

 apical pads, 91 



