724 



INDEX. 



Vomited matters, 698. 

 Vomit, black, 698. 

 Von Baer's law of development, 52. 

 Vorticella, 416-423; encysting process in, 

 419, 420. 



Warington's Universal Microscope, 105- 



108. 

 Water-vascular system, of Rotifera, 429, 



430 ; of Entozoa, 530. 

 Wenham, Mr., his Parabolic Speculum, 



139. 

 his observations on rotation, 



364-367. 



Whalebone, structure of, 598. 

 Wheel- Animalcules ; see Rotifera. 

 White-Cloud Illuminator, 134, 173. 

 White Corpuscles of blood, 598-601. 

 White Fibrous tissue, 603. 

 Williamson, Prof., on Volvox, 261-265. 

 Wings of Insects, 574-576. 

 Winter-eggs of Rotifera, 431 ; of Hydra, 

 61 ; of Entomostraca, 546. 



Wood, of Exogenous stems, 378-384. 

 Woody Fibre, 372 ; glandular, of 'Conifer*, 

 373. 



Xanthidia of Flints, 633. 



Yeast, a vegetable substance, 45 ; produc- 

 tion of, 45, 334, 335. 

 Yellow fibrous tissue, 603, 604. 

 Yellow Water-lily, parenchyma of, 362. 

 Yucca, stomata of, 391, 392. 



Zoophyte-Trough, 149, 150. 



ZOOPHYTES, 457; Hydraform, 461-465; 



preparation of, for microscope, 465-467; 



development of Medusae from, 52, 53. 



467-470 ; Alcyonian, 472-474 ; Actini- 



form, 474-476. 

 Zoospores, formation of, by Ulvaceae, 310, 



311 ; by Vaucheria, 314, 315 ; by Achlya, 



315,316; by Confervaceffi, 318, 319 ; "by 



Cha3tophoracea3, 321 ; by Fucaceae, 330, 



331. 



THE END. 



