724 



INDEX. 



Vomiled mailers, 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 Rolifera, 429, 



430 ; of Entozoa, 530. 

 Wenham, Mr., his Parabolic Speculum, 

 139. 

 his observations on rotation, 

 364-367. 

 Whalebone, structure of, 598. 

 Wheel- Anijnalcules; 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; 5f Entomostraca, 546. 



Wood, of Exogenous stems, 378-381. 

 Woody fibre, 372 ; glandular, of Coniferae, 

 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 ot, 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 Ulvacefe, 310, 

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

 315,316; by Confervacea;, 318, 319; by 

 ChsetophoraceEe, 321 ; by Fucaceae, 330, 

 331. 



THE END. 



