INDEX 



959 



WHORLS, h*.,rljB (A. ,>. hvcorfa, a 



wheel) 242 



WHY TO STUDY 1) 



WIDAL REACTION, definition of.... 200 



WILDER 744, 748 



WILLIS, CIRCLE OF. definition of.. 792 

 \VIXG MUSCLES OF INSECT, wing 



( M. E. winge, wing ) 340 



WING OF INSECT 335 



Wi;N!SLOW, FORAMEN OF. definition 



of 746 



^\l^THEMIA 4-PU8TULATA 368 



WIRSUNG'S DUCT, definition of.... 751 



WISHBONE 704 



\\6HLER ..".', 380 



W< )LFF 38 1 . 386, 388 



WOLFFIAN BODY, wolf 'eean (after 

 K. F. Wolff. German anatomist), def- 

 inition of 482, 504, 808 



Duct 64 



Ridge ..510 



WOOD, wood (A. S. icudu, wood), 



definition of 230 



WUNDT, WM 182 



X CHROMOSOME, definition of. 100, 168 



-\K\OPU8 650 



X I PHISTBRNUM, /insteT'num (G. 



.ziphos, sword + L. sternum, breast) 701 

 XIPHOID, zif'oid (G. .viphos, sword 



-f- eidos, shape ) 80, 101 



MPHO8URA, zifosfmi (G. xiphos, 



sword + o?/ra, tail ) 421 



King-crabs. 



Y-CHROMOSOME. definition of 168 



YEASTS 211 



YELLOW FEVER- 

 HOW caused 130 



YOLK PLUG, yok (A. S. geoloca, the 

 yellow part), definition of 451, 554 



YOLK STALK 462, 48<* 



YPSILOID CARTILAGE, ip'si'loid (G. 

 tipsilon -f- eidos, resemblance) ..... .706 



ZI'ITEL 388 



ZOANTHARIA, zdontluVria (G. zoon, 



animal -\- anthos, flower) 251, 420 



A subclass of (Joelenl crates. 

 ZOANTHIDEA, zoanthi'dea (G. zoon 



+ anthos) 420 



An order of Zoanthar.'a. 



ZONA RADIATA, definition of 443 



ZONE OF JUNCTION, zon (G. zone, a 



girdle) , definition of 450 



ZOOCHLORELLAE, zo'okloreTe (G. 



zoon, animal + rhloreos, green) . . .286 

 ZOOECIUM, zoe'sium (G. zoon. + 



oikos, house ) 310 



ZOOGEOGRAPHY, zoogeog'rafl (G. 



zoon -\- ge, earth -f- graphein, to 



write) , definition of 32 



ZOOLOGY", zodl'Ogi (G. zoon + logos, a 



discourse) 



Economic 32 



ZOOPHYTA, zo'ofl'ta (G. zoon + 



phyton, plant), definition of 255 



ZOOSPORE, zoospor' (G. zoon + 



spora, seed ) , definition of .... 150, 207 



ZOOTHAMNION 155 



ZORAPTERA 423 



An order of Blaltaeformia. 

 Z Y T G A P O P H Y S I S, zlgapof't-sis or 



zigapof'esis (G. zygon, yoke; apo- 



physis, process ) 682 



ZYGOMATIC, zigomat'ik or zigomat'ik 



( G. zygoma, yoke ) 697 



ZYGOSPORE, zl'gospor (G. zygon + 



sporos, seed ) , definition of 205 



ZYGOTK, zl'got (G. zygotes, yoked).. 101 



