INDEX. 



337 



Archieopteryx : vertebra, 44 ; rihs, 50 ; 

 skull, 78 ; scapula, 91 ; pelvis, 45, 98 ; 

 wing, 106 ; foot, 108 ; brain, 147 ; 

 teeth, 216 



Argentea of choroid, 186 



Armadillo : dermal skeleton, 32 ; skull, 83 



Arteries, development of, 268, 270 



Arteries . allantoic, 272, 276, 289 ; aorta 

 (dorsal), 270, 277 290 ; aorta (ventral), 

 278 ; aortic arches or roots, 270, 276 

 290 ; arterial arches, 270, 283285 ; 

 axillary, 288 ; brachiocephalic, 287 ; 

 branchial, 270, 279283 ; carotid, 270, 

 277, 288, 290; caudal, 270, 288290; 

 cceliac, 288, 29?) ; cceliaco-mesenteric, 

 279, 288290 ; crural, 288290 ; cu- 

 taneous, 289 ; digital, 288 ; epigastric, 

 289, 290 ; genital, 288 ; hepatic, 289 ; 

 hyaloid, 183 ; hypogastrio, 288290 ; 

 iliac, 288, 289, 291 ; intercostal, 288 ; 

 intestinal, 288, 289 ; lumbar, 288 ; 

 median sacral, 288 ; mesenteric, 288 ; 

 cesophageal, 284, 290 ; omphalo-mesen- 

 teric, 270 ; ovarian, 289 ; palmar arches, 

 288 ; pulmonary, 270, 277287, 290 ; 

 radial, 288 ; rectal, 289, 290 ; renal, 

 279, 288, 289 ; sciatic, 290, 291 ; 

 stapedial, 203 ; subclavian, 276288, 

 290 ; urinogenital, 290 ; ulnar, 288 ; 

 vertebral, 277, 290 ; vesical, 289 ; vitel- 

 line, 270 



Artiodactyle foot, 109 



Arytenoid cartilages, 254 



Ascalabota, vertebrae, 42 ; ductus endolym- 

 phaticus, 205 



Ascidians, thyroid, 225 



Ateles, caudal vertebrae, 47 



Atlantosaurus, dimensions, 43 



Atlas : of Amphibians, 42 ; of Reptiles, 

 43 ; of Birds, 45 ; of Mammals, 46 



Atrial pore of Amphioxus, 246 



Atrio-ventricular aperture, 279, 287 



Atrium, 269 



Auditory organ, 194 207 : development 

 of, 195 ; relations with air-bladder, 207 



Auditory ossicles, 198, 202 



Auditory region of skull, 58 



Autostylic skulls, 65 



B, 



Bacilli of basement membrane of cochlea, 



206 



Baleen, 27 



Balistes, exoskeleton, 31 

 Basal processes of vertebrae, 35, 42 

 Basilar plate, 57 

 Basipterygium, 99 

 Bidder's organ, 316, 317 

 Bile-duct, 242 

 Blastoderm, 5 

 Blastopore, 6 

 Blastosphere, 5 



Blustula, 5 



Blood-corpuscles, development and form 

 of, 268 



Boar, tusks of, 220 



Body-cavity, 9 



Bones, cartilage-, membrane-, and invest- 

 ing-, 62 



Brachium, 102 



Bradypus, cervical vertebrae, 46 



Brain, 131151 : development of, 131 ; 

 membranes of, 135; cerebellum, 132,133; 

 cerebrum, 132; con volutions, 132; corpora 

 bigemina, 132 ; corpora restiformia, 138 ; 

 corpus callosum, 132, 148 ; crura cerebri 

 etcerebelli, 150; epiphysis, 133; foramen 

 of Monro, 134 ; fornix, 132 ; hypophysis, 

 133 ; infundibulum, 133 ; lobi electrici, 

 138 ; .lobi inferiores, 138, 142 ; lobi 

 nervi lateralis, 139 ; lobes, central, of 

 prosencephalon, 148 ; medulla oblongata, 

 132 ; mesencephalon, 132 ; meten- 

 cephalon, 132 ; inyelencephalcn, 132 ; 

 optic chiasma, 155 ; optic lobes, 132 ; 

 optic thalami, 132; optic vesicles 

 (primary), 132, (secondary), 182 ; 

 pallium", 132, 137 ; peripheral portion 

 of prosencephalon, 132 137 ; pineal 

 gland, 132, 142 ; pituitary body, 133 ; 

 processus infundibuli, 138, 142 ; pros- 

 encephalon, 132, 137150 ; sacci 

 vasculosi, 138, 142 ; thalamencephalon, 

 132 ; ventricles, 131, 133, 134 ; vermis, 

 133 



Brain-case, 57 



Branchial arches, 60, 6568, 74, 78, 80, 

 84, 248 



Branchial clefts, 54, 159, 198, 245 



Branchiomerism, 56 



Branchiostegal membrane and rays, 69 



Bronchi, 252 : main and lateral, 259, 262, 

 263 ; eparterial and hyparterial, 263 



Bulbus arteriosus, 269, 279 



Bursa Fabricii, 234 



Bursae an ales, 233 



Butirinus, spiral valve, 229 



0. 



Cvmim, 209, 233, 236 



Calamus, of feather, 22 



Calcaneum, 105, 106, 109 



Calyces, 308 



Campanula Halleri, 185 



Canalis reunions, 199 



Canine teeth, 214, 216 



Canis : teeth, 218 ; stomach, 235 



Cannon-bone, 110 



Capillaries, 269 



Carapace, 32 



Carcharias : placenta, 12 ; number of 



vertebrae, 37 



Cardiac portion of stomach, 231 

 Carina sterni, 51 



