536 



INDEX. 



Wolf, the, 489 

 Wolffian duct, 444 

 Wombats, 463 

 Woodcock, the, 402 

 - Wood-louse, 109 

 Woodpeckers, 412 

 Wood-pigeon, the, 406 



11 -snail, 302 



11 -wasps, irn. 186, 192 

 Woolly Aphis, 266 

 Worms, 36 ; classes of, 39 

 Wryneck, the, 412 



Xiileborus dispar, 1 7" 



Xyleborus saxeseni, 170 

 Xenopsylla cheopis, 2r'iS 

 XylopJutga, 146 



Yellow Underwing, 203 

 Yellow-hammer, the, 423 

 Y- Moths, 204 

 Yolk sac, 436 

 Y%tnx iorf[>iiUn, 412 



Zabrus ffUbiis, 169 

 Zona radiata, 434, 450 

 Zonary placenta, 456 

 Zygomatic process, of horse, 320 



THE END. 



PEJNTKD BV wri.LIAM BLACKWOOD AND SONS. 



