INDEX 



321 



Cerebral arteries, 165, 183-18G; divisions 

 of, 165, 183 



Cervical plexus, 227, 246 



Cetofliinus (Selache) maximus, 3, fig. 4; 

 gill rakers of, 37, 38, 154, 155 



ChcilosciilUum, color of, 26 



Chlamydoselachus anguincus, adductor 

 muscles of, 108 ; afferent arteries of, 172- 

 173; cranium of, fig. 46; dorsal fin of, 

 6; duct to thyroid, 134; nervous col- 

 lector of, 247; plan of fin skeleton, 77; 

 teeth of, 128-130 



Chorda. See Notochord 



Chorda tympani, 224, 243 



Chordae tendineae, 161, 171 



Choroid coat of eye, 269 



Chromatophores, 26 



Circular constrictor muscles. See Super- 

 ficial constrictors 



Ciliary body, 267, 268 



Ciliary ganglion, 240; relation to sympa- 

 thetic, 247 



Ciliary nerve, 223, 241 



Circle of Willis, 184 



Circulation of blood, in gill filament, 157 



Circulatory system, 160, 170, 198, 204; 

 divisions of, 170; of Elasmobranchs in 

 general, 170-194, 204-218; of Heptan- 

 clms macuJatus, 160-169, 198-203 



CJadoselacJius, 1, fig. 10 ; muscle fibers of, 

 1; paired fins of, 15 



Clasper, 6; as secondary sexual character- 

 istic, 309; function of, 291, 309; mus- 

 cles of, 95, 110-112; relation of, to 

 apertures of uterus, 309-310; relation 

 of, to siphon, 310; skeleton of, 51, 81- 

 82 



CUmatius (?), 1, fig. 11 



Cloaca, 126, 141; ducts to, 126, 141, 291, 

 298; lining of, 126, 141 



Cloacal papillae, 126, 141 



Cloaeal pits, 141 



Cloacal vein, 203, 213 



Coeliac axis, 166, 186; branches of, 166, 

 167, 186-188 



Coeliacomesenteric artery, 190 



Coelom, 96 



Collecting tubules, 287, 289, 294, 295, 297, 

 298, 299; development of, 299-300 



Colon, 126, 141 



Color, 6, 26-27 



Commissural arteries, 162, 178-179 



Compressor muscle, 95, 111-112 



Cones of retina, 269 



V 



/, 



("(instrictor of sac, 95 



( 'onstrictor spiraculae,^ 103 



Conus arteriosus, 160-161, 170, 172 ; valves 

 of, 161, 172 



Coracoarcuales muscles, 93, 94, 108 



Coracobranchial muscles, 94, 109 



Coracohyoideus muscles, 94, 109 



Coraeoid artery, 163, 168, 179, 192 



Coracoid cartilage, 49, 79, 80, 81 



Coraeoid vein, 202, 203, 217 



Coracomandibularis muscles, 93-94, 109 



Corium, 23, 26; origin of, 96 



Cornea, 258, 267 



Coronary artery, 164, 179-180; posterior, 

 164, 168 



Coronary vein, 215 



Corpora bigemina. See Optic lobes 



Corpora restiforme, 222, 235 



Corpus luteum, 301, 303 



Cranial canals. See Canals of head 



Cranial nerves, 223-227, 238-246; abdu- 

 cens, 223-224, 241; auditory, 224-225, 

 243; facial, 224, 241-243; glosso- 

 pharyngeal, 225, 243-244; oculomotor, 

 223, 239-240; olfactory, 223, 238-239; 

 optic, 223, 239; trigeminal, 223, 240- 

 241; trochlearis, 223, 240; vagus, 225- 

 227, 244-245 



Cranium, 42-44, 53-61; development of, 

 53-55; of Chlamydoselachus, 43; of 

 Zygaena, 58-60 



Cross-trunks, 162, 174, 175, 176-177 



Crystalline lens. See Lens 



Cupula terminalis, 272, 273 



Cutaneous veins, 204, 216-217; nature of, 

 217-218 



Cuticular plate. See Dermatome 



Cyclospondyly, 74 



Danielian sinus, 198, 199 



Basyatis dipterura, anterior gastro-pan- 



ereaticosplenic artery of, 190; sting of, 



37 

 Demibranch, 148; absent behind last 



cleft, 176; kinds of, 148 

 Dendrite, 229 

 Dental ridge, 128 



Dentinal canals, 32, 35, 37, 130-131 

 Dentinal papillae, 128 

 Dentine, 32, 33, 131; of fin spine, 33-34; 



of saw tooth, 35; of sting, 37; types of, 



33-35 

 Depressor hyomandibularis, 104, 105 

 Depressor of lid, 102 



