STATE GEOLOGIST. 17 



This valua' le work is particularly good on the Cladocera, but is 

 unfortunately ;^dthout Latin descriptions; so that the Swedish 

 text is a hindrance to its usefulness. It is chiefly of historic value 

 now. Large 8vo; Lund, 1855. 



Schoedler, J. E., Die Branchipoden der Umgegend von Berlin, 1858. 



Smitt, F. A., Sur les Ephippes des Daphnes. 



LuhhocTi, J., An account of the two methods of reproduction in Daphnia, etc. 



I/eyclifiT, Fn, Naturgeschichte der Daphniden. 



The most magnificent work published. 



Lilljehorg, W., Leptodora hyalina, 1861. 



Sars, G. O., Cm Crustacea Cladocera, iagttagne i Omegnen af Christlania, 1862. 



This valuable work is difficult of access, printed on thin paper and 

 without illustrations. A second paper by the same author in 1863 

 is mentioned, but I have never seen it. 



Schoedler, J. E., Neue Beitrage zur Naturgeschicte der Cladoceren, 1863. 



One of the most important works on the Lynceidse. The author 

 is rather too credulous and inclined to form new species. 



Klunzinger, Einiges zur Anatomie der Daphnlden nebst kurzen Bemerkungen ueber 



die Susswasserfauna der Umgegend Cairo's. 

 Sars, G. 0., Norges Ferskvandskrebsdyr Cladocera ctenopoda, 1865. 



The best work on the Sididse, etc. 



Mueller, P. E., Danmark's Cladocera. 



One of the most useful books on the subject. Especially good 

 on Lynceidee and Bosminidse. 



Plateau, Felix, Recherches sur les Crustaces d'eau douce, etc., 1867-69. 

 Mueller, P. E., Note sur les Cladoceres des Grands Lacs de la Suisse. 

 Weismann, A., Bau und Lebenserscheinungen Leptodora hyalina. 

 Sars, G. O., Om en dimorpli Udvikllng Samt Generationsvexel hos Leptodora, 1873. 

 Claus, C, Zur kennt. d Organ, u. d. feineren Baues der Daphniden. 

 Claus, C, Zur kennt. des Baues, etc., der Polyphemiden. 



Gruber and Weismann, Ueber elnige neue Oder unvollkomen gekannte Daphniden. 

 Weismann, Thierleben im Bodensee, 1877. 

 • Lutz, A., Untersuchungen ueber Cladoceren der umgebung von Bern. 

 Claus, C, Die Schalendruse der Daphniden, 1874. 

 Spangenberg, Fr., Ueber Bau und Entwicklung der"Daphniden. 

 Lilljeborg, W., Crust, Suececorum Ordin. Branchiop. et Subord. Phyllop., 1877. 

 Pavesi, P., Nuova Serei di recherche della fauna pelagica nei laghi Italiani, 1877-1879. 

 Grobben, C, Zur Entwicklungsgeschicte d. Moina rectirostris, 1789. 

 Weismann, Beitrage zur Naturgsch. der Daphnoiden, Leipzig, 1876-79. (Valuable od 

 the physiology). 



The American literature may be catalogued in a few lines. The 

 first descriptions and figures with which I am familiar are those in 

 the Rep. of the U. S. Fish Commission, 1874, where S, L Smith notes 

 Daphnia galeata, D. pellucida and D. pulex; also a species of Bos- 

 mina, Eurycercus lamellatus and Leptodora hyalina. 



A. E. Birge was the first to systematically study Cladocera in 

 America, and his '* Notes on Cladocera " furnished a basis upon 

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