64 Miscellaneous. 



wanting only in Lake Chambon ; Diaptomus castor, Jnrine, is want- 

 ing in lakes Chambon and Guery ; and both species abound in the 

 other lakes. In Lake Pavin, to 7 or 8 metres from the shore, 

 D. castor was of a bright vermilion-red ; in the middle^ to a depth 

 of 11 metres, it was colourless. 



Cyclops strenuus, Pischer, which is very abundant in small pieces 

 of water, occurred in innumerable troops in all the lakes except 

 Montcineyre. In the lakes it is colourless, while in small sheets of 

 water it is generally red. The pelagic variety in the lakes is more 

 slender, and in some respects approaches C. lucidulus, Koch. Bos- 

 inina longirostris, 0. F. Miill., is wanting only in Lake Pavin ; it 

 abounds in lake Guery, in company with Holopedium gibherum. 

 These last four species are very common and abundant, and thus 

 have the better chance of dispersion. 



Ceriodaphida pidchella, Sars, found abundantly in the lakes of 

 Bourdouze and Montcineyre, is here clearly pelagic, as in the lakes 

 of North Germany and in Gerardiner. Lastly, Daphnella Brandtiana, 

 Fisch., occurred in immense numbers in lakes Chambon and Bour- 

 douze. 



With regard to the Rotatoria and Cilioflagellata the same remarks 

 as to regularity of dispersion will apply. Aiinrcea loncjispina, Kelli- 

 cott, was abundant in Lake Pavin, rare in Lake Chambon ; A. coch- 

 learis, Gosse, free, but very rare in Lake Montcineyre, and in the 

 stomach of Asplanchna helvetica, Imhof, in Lake Bourdouze. As- 

 planchna helvetica was also met with in Lake Guery, In Lake Cham- 

 bon examples of Anurcea curvicornis, Ehr., were found in the stomachs 

 of many specimens oi Asplanchna Girodi, De Guerne. Colonies of 

 ConocMlus volvox were found abundantly in Lakes Pavin and Mont- 

 cineyre. 



Among the Cilioflagellata the author mentions only Ceratium lon- 

 gicorne, Perty, as being rare in Lakes Montcineyre and Bourdouze. 

 He also refers to the Hydrachnids, Atax crassipes, 0. F. Miill., 

 Axona versicolor, 0, F. Miill., Nesctia rotunda, Kram., and N. reti- 

 culata, as occurring in the lakes. 



Among the Cladocera, Hyalodaplmia cucidlata, Sars, var. apicata, 

 Kurz, of which the latter author makes a distinct species, is new to 

 the French fauna. This variety had hitherto been found only in 

 Bohemia. A new Eotifer, Asplancluia Oirodi, has been studied by 

 M. J. de Guerne *. 



Comparing the pelagic fauna of the lakes of the Auvergne with 

 those of various Eu.ropean countries, we find that it has some points 

 in common with all and that it differs from all in other points. 

 Thus the following species are common to the lakes of the Mont 



* ' Excursions zoologiques dans les iles de Fayal et de San Miguel 

 (Azores),' Paris, 1887. In a monographic note on the genus Asplaiichjia 

 M. J. de Guerne describes and fiorm'es A. Girodi. 



