430 Miscellaneous. 



Cladocera : — DrepanotJirix dentata, Euren. 

 Copepoda : — Canthocamptus, sp. 



Tho samples of the bottom contained a few spicules of a Spon- 

 gilla. 



3. Lac Noir. 



950 metres above the sea ; length 520 metres ; surface 14 hectares. 



Pelagic fauna : Eotatoria : — ConocJiilus volvox, Ehr. ; very nume- 

 rous. 

 Pohjarthra platyptera, Ehr. 

 Anurcea aculeata, Ehr. 



cochlearis, Gosse. 



longispina, Kellie. 



Asplanclma, sp. 



Cladocera : — Holopediuin r/ibberum, Zadd. 

 Bosmina, sp. 



Copepoda : — Nauplius, abundant. 



Bottom fauna : Protozoa : — Diffiugia acuminata, Ehr. 



pyriformis, Perty. 



Centropyxis aculeata, Ehr. 



4. Lac Vert, or the Sidser- or Darensee. 



980 metres above the sea ; length 320 metres ; surface 4-23 

 hectares ; depth 10-11 metres (since the raising of the dam above 

 the natural outflow, 18 metres). 



Pelagic fauna : Rotatoria : — Triarthra longiseta, Ehr. 



Polyarthra platyptera, Ehr. 

 iSyncJiceta p>ectinata, Ehr. 

 Anurcea cocldearis, Gosse. 

 longispina, Kellie. 



Copepoda: — Cijclops, sp. 



5. Lac Blanc. 



Upon the Eeisberg, 1054 metres above the sea ; length 760 

 metres ; width 380 metres ; surface 24-86 hectares. 



Pelagic fauna : Rotatoria : — Anurcea longispina, Kellie. 



Asplanclma, sp. 



Copepoda : — Naxiplius, numerous. 

 Cyclops, sp. 



