5 i8 



INDEX 



Typkiichthys, 401 

 Typhlonus, 459 

 TypMoms, 459 



Umbra, 398 

 Umbriiiu, 431 

 Undina, 290 

 ('ml i no gulo, 287/. 

 Upeneoides, 429 

 Upeneus, 429 

 Uranoscopidae, 456 

 UranoscQpus, 82, 456 

 Urenchelidae, 404 

 Urenchdys, 403, 404 

 iirinogenital organs, 27, 83, 



86/"., 131 /'.; ofSelachii, 



132 ; of Dipnoi, 253 ; of 



Teleostei, 365 

 Uroconger, 405 

 Urogymnus, 164 

 Urolophus, 164 

 Uronemidae, 265 

 Uronemus, 233, 246, 266 ; 



*7. lobatus, 256,/'. 



vagus nerve, 8, 19 



vascular system, 26 ; of 

 Cyclostomes, 43, 47 ; of 

 Pisces, 109 ; of Dipnoi, 



148 ; of Teleost, 363 ; 

 of Monopterus, 409 



veins, 43, 48, 114 



Veli/er, 476 



Veliferidae, 476 



vertebrae, transverse sec- 

 tions of, 137./'. 



vertebral arches. 31, 68 ; 

 neural, haemal, and in- 

 tercalary. 100 



vertebral centra, 68, 135 ; 

 chonlal, 100 ; perichor- 

 dal, 100 



vertebral column, 31. 68, 

 97, 135, 233, 273, 

 327, 352 ; elements of 

 segment, 100 



viviparity of Elasmo- 

 branchs, 134 ; of Teleosts, 

 415, 446, 459 



Vomer, 464 



Vomeropsis, 464 



Vulsus, 456 



Wardichthys, 313 



Weber's apparatus, 373 

 Wodnika, 146 



Xehacawthus, 182/., 183 



Xenocharax, 375 

 Xenomystus, 390 

 Xenopholis, 340 

 Xenopterus, 440 

 Xiphasia, 458 ; X. set\fer, 



458/ 

 Xiphias, 62, 468 : X. 



gladius, 355 

 Xiphiidae, 468 

 X iji/< iorh y n eh us, 468 

 Xyjihotrygon, 164 

 Xystrodus, 147 



yolk-sac, 114, 132; cir- 

 culation, 114 



Zand us, 436 



Zaniolepis, 453 



Zeidae, 469 



Zenion, 469 



Zeorhombiformes, 468 



Zengopterus, 474 



Zeus, 469 



Zoo tres, 364, 365, 368, 



459 ; Z. viviparus, 459/ 

 Zoarcidae, 458 

 Zygaena, 151 ; Z. malleus, 



76 /'., 117 f. ; Z. ttides, 



152/, 153/ 



Printed by R. & K. Ci.akk, Limited, Edinburgh. 



