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, 



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



299, 365 



alisphenoids, 148 

 allantoic arteries, 70, 71 

 allantoic veins, 70, 71 

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



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, 



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

 amniotic fluid, 70, 71 

 amphibians, no, 148, 166, 170, 



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

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

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

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

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

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

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



amphibians (Continued) 

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

 5i8 



amphiccelous vertebrae, 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, 521, 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 

 260, anal fin, 164 

 298, anal sacs, 113 



Anamnia, 70, 78, 384 

 Anarrhichas, 489 

 Ancylopoda, 38 

 angulare, 156 

 347, 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, 90, 214, 

 375, 226, 230, 251, 256, 298, 409, 447, 

 457 480, 496, 500, 504 



antitropists, 244 



172, antrnm of Highmore, 482 

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

 285, 495 



319, anus, 258, 259, 296 

 352, aorta, aortse, 320, 326, 339, 351, 354 

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

 425, 390 

 469, apical pads, 91 



551 



