Zoologischer Anzeiger 



herausgegeben 



von Prof. J. Victor CaFUS in Leipzig. 



Zugleich 



Organ der Deutschen Zoologischen Geseilschaft. 



Verlag von Wilhelm Engelmann in Leipzig. 



XXIII. Band. 24. September 1900. No. 625. 



Inhalt: 



I. Wissenschaftl. Mittheilungen. I vergleichend-osteologischer Untersuchungen 



der Tagrauhvögel. p. 522. 



1. Calkins, Lymphosporidium Truttae, nov. gen. 



nov. sp. The cause of a recent Epidemie 

 among Brook Trout, Salvelinus fontinalis. 

 (With 6 figs.) p. 513. 



2. Latzel, Zwei neue Myriopoden aus dem 

 Mittelmeergehiete. (Mit 1 Fig.) p. 520. 



3. Suschkin, Weitere systematische Ergehnisse 



II. Mittheilnngen ans Museen , Instituten etc. 



1. Congrès International de Zoologie, p. 528. 



III. Personal-Notizen. 



(Vacat.) 

 Litteratur. p. 429-444. 



I. Wissenschaftliche Mittheilungen. 



1. Lymphosporidium Truttae, nov. gen. nov. sp. The cause of a recent 

 Epidemie among Brook Trout, Salvelinus fontinalis. 



By Gary N. Calkins , Columbia University, New York City. 

 ("With 6 figs.) 



eingeg. 26. Juli 1900. 



In October of the last year (1899) my attention was called to the 

 great mortality among the Brook Trout of a private hatchery on Long 

 Island, New York. Since the middle of May 1899, the fish had been 

 dying by thousands and by fall it appeared that every fish in the 

 hatchery was doomed. 



The disease was first noticed in May when a young individual 

 was taken out dead, and the Superintendent of the hatchery observed 

 a small, clean-cut hole in the side. Thinking that the hole was made 

 by some birds beak, and that the yearling had been killed in this 

 way, the fish was thrown away without further thought. When 

 however, others were observed from time to time with similar holes 

 and the death rate became noticeably large, steps were taken to as- 

 certain the nature of the disease and the cause of the trouble. 



In October the fish appeared sluggish and to have lost consider- 

 able vitality. They were unable to withstand handling of the gentlest 

 kind and hundreds of them died every day. The dead ones as a rule, 



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