INDEX 



:5:]1 



stomach, 123, 135-136; arterios to, 166, 

 167, 186, 188, 189-190; crypts of, 135; 

 glands of, 135; limbs of, 123; lining of, 

 123, 135; mesentery to, 121; nerves to, 

 227, 245; secretion of, 135; veins of, 

 200-201, 211 



Stomodeal denticles, 25, 38, 122, 266; 

 function of, 38; in thyroid,Chlamydosel- 

 achiis, 134 ; location of, 38, 122 ; of Hep- 

 tanchus, 25, fig. 27; rudimentary, 38 



Stomodeum, 127 



Subclavian artery, 168, 191; in Heptan- 

 chus, 168, 191-192 



Subclavian vein, 202, 214 



Subintestinal vein, 208, 212; derivatives 

 of, 208, 210 



Subscapular sinus, 203 ; tributary to, 203 



Subscapular vein, 202, 214; in Squahis, 

 214 



Subspinalis muscle, 92, 106; nerve to, 227 



Superficial constrictors, 90, 101; functiou 

 of, 90 



Superficial intercostal artery, 169 



Supraophthalmic ampullae, 262, 279 



Superior commissure, 233 



Superior lobes of hypophysis, 233-234 



Superior mesenteric artery, 167, 188-190; 

 in rays, 190; its branches, 167, 188-190 



Superior oblic|ue muscle, 89, 99 ; nerves to 

 44, 100, 223, 240; origin of, 99 



Superior rectus muscle, 90, 99; nerve to, 

 100, 223, 241; origin of, 99 



Supernumerary branchial arches, 47 



Supporting cells in ampulla, 273 



Suprachoroidea, 268 



Supracranial fontanelle, 57; in rays, 57 



Supraorbital canal, 261, 274, 276-277; in- 

 nervation of, 224, 242, 274 



Supraorbital crest, 44, 57, 58, 241 



Suprapericardial body, 151 



Suprarenal body, 248 



Suprascapula, 49 



Supratemporal canal, 261, 276, 278; in 

 Elasmobranchs in general, 278; in Hep- 

 tanclms, 261 ; nerves to, 225, 245, 278 



Supratemporal nerve (IX), 244, 279; (X), 

 245, 278 



Suspensory ligament of liver, 121 



Sympathetic nervous system, 247-248 



Tail (caudal fin); electric organ in, 112; 

 of Heptanchus, 6 ; of Prist is, 9 ; of 

 Eliinohatis, 9 



Taste buds, 265, 266; nerve to, 243 



Taste organ, 265—206 



Tectospondyly, 75 



Teeth, 1, 38, 122, 128; development of, 

 128; finer structure of, 130; of Car- 

 charodon, 38; of Heptanchus, 122; of 

 Heterodontus, 130 ; of Lamna, 9 ; of 

 Mustelus, 9; of MyUohatis, 38; pave- 

 ment, 130; replacement of, 131 



Telencephalon, 221, 230 



Tendineae. See Chordae tendineae 



Terminal cartilage, of clasper, 81-82 



Terminal nerve of Locy, 221, 223, 239; in 

 Heptanclms, 221, 223 



Tertiary renal corpuscles, 300 



Testes, 290-291, 300, 301 ; central canal of, 

 290-291, 301 ; development of, 300 ; rela- 

 tion of, to epigonal organ, 300 ; rudi- 

 mentary, in female Heptanchus, 290; 

 structure of, 300, 301 



Third ventricle, 236 



Thread cell of ear, 273 



Thymus gland, 122-123, 132-133 ; develop- 

 ment of, 132; with duct in Heptanchus, 

 122-123 ; function of, 133 



Thyroid artery, 164-165 



Thyroid gland, 122, 123, 133-134 ; arteries 

 to, 164-165; capsule of, 133; denticles 

 of, in Chlamydoselachu-s, 134; develop- 

 ment of, 134; duct of, in Chlamydose- 

 lachns, 134; follicles of, 133, 134; his- 

 tory of, 133-134 



Thyroidean sinus, 208 



Tongue, 122, 128 



Tooth germs, 128 



Torpedo, 3, fig. 6; color of, 26, 27 ; electric 

 organ of, 112, 115 



Trabecular cartilage, 53 



Tract cells, 236 



Tractus arteriosus lateralis, 192 



Trapezius muscle, 92, 104 



TriaJcis semifasciatus, integument of, 26 



Trigeminal nerve, 223, 240-241; divisions 

 of, 223, 240-241; ganglion of, 240-241; 

 nucleus of, 240 



Trochlear nerve, 223, 240; foramen of. 

 44; muscle supplied by, 100; origin of, 

 234 



Trunk myotome. See Myotome 



Tuberculum acusticum, 236 



Tympanic membrane, 272 



Tympanum, of Heptanchus, 272; of rays, 



