INDEX. 



Transverse process, 56 

 Trochal ridge, 279, 303 

 Trochosphere, 279, 303 

 Truncus arteriosus, 17, 19, 81, 91 

 Tuber cinereum, 99 

 Tubular fibres (see Neurochord) 

 Tympanic cavity, 9, 33 ; mem- 

 brane, 2, 9, 33 

 Typhlosole (see Intestinal valve) 



U. 



ULNA, 70 



Umbilicus, 282 



Umbo, 332 



Uncini, 28^ 



Unguis, 477 



Unio, 305 



Unipolar nerve-cell, 139 



Upper layer cells, 158, 159, 166 



Ureter, 48 



Urinary bladder (see Urocyst) 



Urino-genital duct, 48, 52, 54; 



organs, 51 

 Urocyst, 23, 39 

 Urostyle, 12, 55, 58, 59 

 Utriculus, 33, 120 



V. 



VACUOLE, Chara, 437,438 ; Mucor, 

 421, 428 ; Penicillium, 417, 425, 

 426 ; Protococcus, 393 ; Spiro- 

 gyra, 397. 39$, 44 ; Trades- 

 cantia, 441 ; Yeast, 378, 384 



Vallisneria, 442 



Valves, of heart, Crayfish, 223 ; 

 Frog, 18; Mussel, 325, 337; 

 Snail, 293 



Valves, of stomach, Crayfish, 211, 

 212 ; of shell (see Exoskeleton) 



Vasa efferentia, 23, 54 



Vascular bundle, Bean, 463 ; Fern, 



446, 453 



Vasdeferens, Crayfish, 217; Earth- 

 worm, 268; Frog, 23; Snail, 291 



Vein, afferent hepatic, 82 ; afferent 

 renal, 20, 83 ; anterior abdo- 

 minal, 20, 37, 38, 44, 82 ; ax- 



illary, 85 ; cystic, 82 ; dorso- 

 lumbar, 83 ; duodenal, 88 ; 

 efferent hepatic, 20, 84 ; effer- 

 ent renal, 20, 84 ; epigastric, 82 ; 

 external jugular, 84 ; femoral, 

 83 ; gastric, 88; genital, 20, 84; 

 great cutaneous, 20, 37, 85 ; 

 hasmorrhoidal, 88 ; hepatic-por- 

 tal, 20, 82, 87 ; inferior cava, 



17, 20; innominate, 85; in- 

 ternal jugular, 85 ; lieno-intesti- 

 nal, 88 ; lingual, 84 ; oviducal, 

 83 ; pelvic, 82 ; posterior car- 

 dinal, 169 ; pulmonary, Frog, 



18, 21, 85; Snail, 292; renal 

 portal, 20, 83, 89 ; sciatic, 83 ; 

 subclavian, 85 : superior cava, 

 17, 20 ; superior mesenteric, 88 ; 

 vesical, 82 



Veliger, 279, 304 



Velum, 279, 304 



Venous system, Crayfish, 181 ; 

 Frog, 20; Mussel, 328; Snail, 

 294 



Ventricle, Frog, 17, 81, 91 ; Mus- 

 sel, 324 ; Snail, 275 



Ventricles of brain, 26, 100 



Veronica, 480 



Vertebral body (see Centrum) 



Vertebral column, n, 55 



Vesicle, contractile, Amoeba, 370, 

 374 ; Vorticella, 361, 365 ; of 

 egestion, Amoeba, 371 ; Vorti- 

 cella, 362; of ingestion, Amoeba, 

 371 ; Vorticella, 362 



Vesicula seminalis, 52 



Vessel, Bean, 464 ; Fern, 446, 455 



Vestibulum, 360, 364 



Vexillum, 476 



Vibrio, 409, 413 



Vtcia, 460 481 



Visceral arch, 160, 161, 164, 170; 

 cleft, 164, 171; pouch, 170, 171; 

 sac, 273 



Visual organ (see Eye) 



Vitellus, 24, 270 



Vitelline membrane, 155, 220, 270, 



339 

 Vitreous humour, 117 



