Journal of Applied Microscopy. 563 



one including from two to four objects. The general plan is to present first the 

 material and methods, then directions for study, and finally an historical re'sume' 

 of the subject. The work furnishes an excellent introduction to the subject of 

 cytology. c. j. c. 



Stone, 0. E. Flora of Lake Quinsigamond. The list is especially rich in algae. It 

 Mass. Agricultural College, July i, 1899. .^ unfortunate that such lists are so 



rare, for it would be interesting to compare such complete aquatic floras of 

 different regions. Permanent preparations were made of most of the filamentous 

 algae given in the list. The writer used for this purpose a mixture of one part 

 glycerine, two parts water, and three parts alcohol. The algae to be mounted 

 were placed in this fluid, and the water and alcohol were allowed to evaporate. 

 The mounts were then sealed in the usual manner. c. j. c. 



RECENT LITERATURE. 



Butschli, 0. Untersuchungen iiber Structuren, Klebs, G. Zur Physiologie der Fortpflanzung 



with an atlas of 26 plates of microphoto- einiger Pilze. IL Saprolegnia mixta. De 



graphs. Leipzic, 1898. Bary. Jahrb. f. wiss. Bot. 33: 513-593, 



Davis, B. M. The Spore Mother Cell of An- 1899. 



thoceros. Bot. Gaz. 28 : 89-109, pi. 9-10, Schenck, F. Physiologische Charakteristik der 



1899. Zelle. Pp. 123. Wiirzburg (A. Stuber), 



Dixon, H. H. Self-Parasitism of Cuscuta reflexa. 1899. 



Proc. Roy. Irish Acad. 3rd Ser. 5: 219-220, ^^^^^^^ ^ Centrifugales Dickenwachsthum der 



9^' Membran und Extramembranoses Plasma. 



Fullmer, E. L. The Development of the Micro- j^^rb. f. wiss. Bot. 33: 594-690, pi. 6-8, 



sporangia and Microspores of Hemerocallis 

 fulva. Bot. Gaz. 28: 81-88, pi. 7-' 



It 



Zehnder, Ludwig. Die Entstehung des Lebens. 

 Hormann, G. Die Continuitiit der Atomver- Erster Theil : Moneren, Zellen, Protisten. 



kettung, ein Structurprincip der lebendigen Freiburg i. Br., pp. 256, 1899. 



Substanz. Pp. 118, with 32 text figures. 

 Jena, 1899. 



ANIMAL BIOLOGY. 



Agnes M. Claypole. 



Separates of papers and books on animal biology should be sent for review to 



Agnes M. Claypole, Sage College, 



Ithaca, N. Y. 



CURRENT LITERATURE. 



„ . , , The author has taken up work in a 



neidenhein, Martin. Beitrage zur Aufklarung j /■. r • 



des wahren Wesen dei faserformigen Dif- line considered by Benda (Weitere 

 ferenzirungen. Anat. Anz. 16: 97-131. Mitteilungen uber die Mitochrondria. 

 11; fig. in text, i8gg. „ , , -r. 



^ ^ Verhdlg. der Phys. Geselsch. zu Ber- 



lin, 1898-99). That author states his conviction that the protoplasmic continua- 

 tions of cilia on ciUated cells pass downward, and eventually past the nucleus, 

 into the lower part of the cell, undergoing in their course actual confluence, so 

 that fewer fibers exist when passing the nucleus than at the free end of the cell. 

 Heidenhein found a most beautiful demonstration of the same condition in the 

 epithelium of the intestinal tract of the frog ; but it was found to be visible only 

 when the cells were cut at a given plane. This epithelium has of course no cilia, 



