854 INDEX 
PAGE PAGE 
Ungulata. . . . ‘ 53 | Vascular system of— 
Unio . ‘ ‘ » 393 i sea-urchin  . - 267 
Ureter . . 717, 718 o Sepia . + 408 
Urethra ‘ 719 5 skate . A » 544 
Urochorda , 443 is spider . : » 369 
Urodela 606 is starfish . + 259 
Urostyle ‘ + 582 si Vertebrates . 504 
Urside . : - 778 | Velarium . ‘ F - 152, 
Ursus . . 778 | Velella. : . $ « 193 
Uterus . » 719 | Veliger. 416 
49 masculinus 719 | Velum. » 150 
Utriculus of ear 493 | Venous system. See Vascular 
system. 
VACUOLES . , j - 44 | Ventricles of brain 487 
a contractile . » 90 rr of heart 505 
x food . a » 90 | Venus . x r P - 426 
Vagina. Z Z ; » 719 >,  flower-basket . é- 133 
Vagus nerve . P ‘ « 490 » girdle 175 
Vampire bat. . . - 783 | Vermiform appendix . » 711 
Vampyrus  . F . 783 | Vertebra, parts ofa 482, 630, 700 
Varanide . . 5 + 629 | Vertebral column. . 481 
Variation 54, 151, 808 3 3 of birds 648 
Vas deferens. : F - 513 3 45 of crocodile 636 
Vascular system of— 53 »  Offrog . 582 
Amphioxus . - 467 ee ‘9 ofhaddock 552 
3 Anodonta . » 398 i “5 of lizard 623 
Fe Arenicola 227 35 is of pigeon . 659 
Ae Ascidian . + 449. - x6 of rabbit 700 
53 Ennai + 437 55 “9 of skate . 533 
a bee. + 337 i 9 ofsnakes . 630 
i cockroach . » 330 ; Vertebrata P a - 473 
4 crayfish a . 290 5 affinities of Annelids 
5 Crinoid ‘ . 274 with . 476 
a Crocodilia . . 639 55 ancestry of . 475 
»  ‘Dipnoi. - 575 Ja development of 514 
‘3 earthworm . » 216 ss general characters 
em frog. ‘ + 591 : of + 473 
+5 haddock F - 557 9 ae classifica- 
3 Helix . - - 387 tion of. 475 
55 Hirudo. 2 - 240 a3 gill-clefts of . + 474 
23 Insects. ' + 347 <3 heart of ‘ + 505 
i Lizards 3 625 a and Invertebrata . 7 
55 Mammalia . +» 695 - nervous system of. 482 
sy Myxine ‘ + 520 " notochord of. . 481 
33 Nemerteans . + 200 a segmental symme- 
$5 Peripatus + 320 “ try of , » 474 
55 Petromyzon , + §25 | Vesicule seminales. See Re- 
a pigeon . . - 667 productive system. 
5 rabbit . F » 712 | Vesiculate . é - « E51 
7 scorpion, - 365 | Vespertilio . a « 2a 783 
