434 INDEX AND GLOSSARY. 



Voluntary muscle, 197. 



Vomited matters, 317. 



Warm stage, 42. 



Wandering-cells, 121, 247. Leucocytes which traverse the 

 tissues. 



Water-bears, 164. The Tardigrada, placed by some in the 

 class Arachnida. 



Water-fleas, 178. Several kinds of microscopic Entomos- 

 tracan Crustaceans. 



Wax, 133. 



Water woodlouse, 172. An Isopod Crustacean. 



Warts, 192. 



Wenham's prism, 30. 



li reflex prism, 347. 



Webster's condenser, 34. 



White blood-cells, 188. 

 " varnish, 76. 



Woolaston doublet, 23. 



Working distance, 51. 



Woodward's prism, 347. 



Xanthidia, 96. Sporanges of Desmidiaceas found in flint. 



Xanthoma, 277. 



Yeast-cells, 136. The Torula or yeast fungus. 



Yellow tubercle, 274. 

 " elastic fibre, 194. 



Yolk, 201. Contents of the vitelline membrane of the 

 ovum. 



Zentmayer's microscope, 30. 



" Centennial microscope, 345. 



" histological " 345. 



Zooid, 188. One of the constituents of the red blood-disk. 



Zoea, 174. The larval form of the crab. 



Zoospores, 140. Ciliated cells of Algae, etc., produced by 

 segmentation, and producing new individuals after being en- 

 cysted. 



Zoology, microscope in, 158. 



Zoophytes, 164. Animal flowers. A name formerly given 

 to Actinea and other Hydroids. 



Zygnema, 151. A genus of Confervoid Algae. 



