Index. 



461 



Water vascular system, 33, 166, 173, 



195. 293- 

 Wax organ, 383. 

 Weber, 3, 

 Wedlia, 173. 

 Weinland, 170. 

 Weisse, 196. 

 Weissmann, 393. 

 Wheel organ of Pneumodermon, 



278. 

 White corpuscles, 2. 

 Wicke, 292. 

 Will, 107. 

 Willsia, 92. 

 Winkler, 21. 

 Wittich, Von, 16. 

 Wright, E. P., 119, 120, 146. 

 W^right, T. S., 58, 82, 94. 

 Wrisberg, 58, 66. 



Xanthea, 95. 



Xanthin, 7. 



Xenia, 119. 



Xenophora, 310. 



Xenospongia, 77. 



Xiphigorgia, 122. 



Xyphosura ( = Poecilopoda), 351. 



Xylocopa, 420. 

 Xylophaga, 408. 

 Xylotropha, (Cossus), 405. 



Yellow cells of Radiolaria, 61. 

 Yellow elastic tissue, 15. 



Zaddach, 398. 

 Zamiosoma, 268. 

 Zanclea, 92. 

 Zaphrentis, 115. 

 Zetes, 370. 

 Zoantharia, 113. 

 Zoanthidse, 114, 

 Zoanthodema, 120. 

 Zoanthus, 114. 

 Zoea, 342. 

 Zonites, 198, 312. 

 Zonites, 297. 

 Zooecia, 229. 

 Zooid, 32. 

 Zoothamnion, 69. 

 Zygocyrtidas, 62. 

 Zygocystis, 65. 

 Zygoselmis, 55. 

 Zygostephanus, bo. 



END OF PART I. 



