354: 



INDEX. 



White-cloud Illuminator, i. 111. 



White Corpuscles of blood, ii. 270, 271. 



White Fibrous tissue, ii. 272. 



Whitney, Mr., on circulation in Tad- 

 pole, ii. 289-292. 



Williamson, Prof. W. C., on Volvox, i. 

 243 note; on shells of Crustacea, ii. 

 215 note; on scales of Fishes, ii. 261, 

 262; on Coal-plants, ii. 303; on Levant- 

 mud, ii. 305. 



Wings of Insects, ii. 241-243. 



Winter-eggs, of Rotifera, ii. 59; of 

 Hydra, ii. 125; of Entomostraca, ii. 

 210. 



Wollaston, Dr., his Camera Lucida, i. 

 96. 



Wood, of Exogenous stems, i. 369, 

 370. 



Woodward, Col. Dr., his Prism, i. 105; 

 his resolution of Amphipleura pellu- 

 cida, i. 171; of Surirella gemma, i. 

 172; on scale of Gnat, i. 155, on Podu- 

 ra-scale, ii. 227. 



Woody Fibre, i. 363; glandular, of Con- 

 ifers, i. 364. 



Working-distance of Objectives, i. 161. 



Wormley, Dr., on Micro-Chemistry, ii. 

 326. 



Wyth's Amplifier, i. 86. 



Xanthidia of Flints, i. 267 note t ii. 

 308. 



Yeast-plant, i. 315. 

 Yellow Fibrous tissue, ii. 273. 

 Yucca, epidermis of, i. 377; stomata of, 

 i. 380. 



Zeiss's oil-immersion Objectives, i. 17, 

 18; his adjusting Low-power, i. 136, 

 166; his Sub-stage Condenser, i. 104 

 note. 



Zentmayer, Mr., on denning power, i. 

 162 note; his swinging tail-piece, i. 

 61, 75; his glass stage, i. 63. 



Zoea-larva of Crab, ii. 216. 



Zoantharia, ii, 135. 



Zooglcea, i. 308. 



Zoophyte-Trough, i. 125. 



ZOOPHYTES, ii. 122-137; see Actinozoa, 

 Alcyonaria, and Hydrozoa. 



Zoospores, i. 230; note; of Protococcus, 

 i. 2o3, 234; of UlvaceaB, i. 247; of Vau- 

 cheria, i. 250; of Achlya, i. 251; of 

 Confervaceae, i. 254; of Chaotophora, 

 i. 258; of Pediastreaa, i. 271; of Fuca- 

 cese, i. 334. 



Zygnemaceoz, i. 236, 237. 



Zygospores, i. 229; of Conjugatese, i. 

 232, 236; of Desrnidiacese, i. 267, 268; 

 of Diatomacese, 281, 283. 



Zygosis of Actinophrys, ii. 12; of Amoe- 

 ba; ii. 17; of Gregarina, ii. 22. 



Zymotic action of Bacillus-organisms, 

 313-315. 



ERRATUM. 



The first sentence in the Note to p. 163. vol. i., should run thus: 

 The Author is informed by Prof. Abbe, that the ' penetration ' of Objectives de- 

 creases in a corresponding ratio with the increase of their respective Numerical 

 Apertures; or, when Objectives of the same class are compared, with the increase 

 in the sines of their respective semi-angles of aperture. 



