THE ANJNALS 



AND 



MAGAZINE OF NATUEAL HISTOEY. 



[SIXTH SERIES.] 

 No. 82. OCTOBER 1894. 



XXXIII. — On the Freshwater Crustacea of the Indian Archi- 

 pelago, with Observations on the Fauna of Freshwater in 

 General. By Max Weber *. 



Important contributions to our knowledge of the Crustacean 

 fauna of the fresh waters of the Indian Archipelago have 

 been furnished in the foregoing communications printed in 

 this second volume. 



Five Cladocera, two Copepods, and a Branchiopod were 

 introduced by Herr J. Richard and six Ostracods by Herr R. 

 Moniez, all of which were collected by myself in Sumatra 

 and Celebes. Beyond doubt this gives us but a first glimpse 

 of the Entomostracan fauna of the Indian islands, which is, 

 at any rate, richer than this. It is, however, impossible 

 sufficiently to emphasize the fact that Entomostraca are 

 incomparably less numerous than in our European waters. 

 It is important to observe the number of the individuals of 

 Daphnella excisa, and especially of Moina Weberi and 

 Diaptomus ortentalis, which occurred only in the pelagic 

 region of the great freshwater lakes of Singkarah and 

 Manindjau, the altitude, extent, and situation of which were 

 described at length in the introduction to this work. In these 

 large basins I captured the species mentioned in thousands, 

 together with a smaller number of Cyclops simplex ; in the 

 evening they were met with on the top of the water, but 



* Translated from " Zoologische Ergebnisse einer Reise in Nieder- 

 landisch Ost-Indien, herausgegeben von Dr. Max Weber," Bd. ii. Heft 2, 

 Leiden, 1892, pp. 528-543. 



Ann. & Mag. N. Eist. Ser. 6. Vol. xiv. 17 



