740 FRESH-WATER BIOLOGY 



Keilhack, L. 1910. Phyllopoda. In Brauer's Siisswasserfauna Deutsch- 



lands, pt. 10; 112 pp., 265 text figs. 



An admirable account of the Cladocera of Germany, most of which are found in this country 

 also. It should be the first book procured by any one who can read German. 



LiLLjEBORG, W. 1900. Cladocera Sueciae. Upsala. 701 pp., 87 pi. 



Latin keys and diagnoses; otherwise German. Indispensable for a critical study of the 

 group. 



Richard, J. 1894. Revision des Cladoceres. Part I. Sididae. Ann. Sci. 

 Nat., Zool., (7) 18: 279-389, 2 pi. 

 1896. Part II. Daphnidae. Ann. Sci. Nat., Zool. (8) 2: 187-363; 6 pi. 

 Invaluable for the families which they cover. 



Sars, G. O. 1901. Contributions to the Knowledge of the Freshwater Ento- 

 mostraca of South America. Part I. Cladocera. Arch. Math. Nat. 

 Kristiana, Bd. 23, no. 3, 102 pp., 12 pi. 

 Necessary for the study of southern cladocera, but not needed for the northern states. 



Note. — All illustrations for this chapter have been drawn especially for it, and all are made from the 

 actual specimens, except in a few cases, which are indicated. 



