29 



Individuen-Zahl : 



Polyarthra pìatyptera 164 850 



Triarihra longiseta 541650 



Anuraea cochlcaris 117750 



Hyalodaphnia hahlhergensis 106 975 



Bosmina loiigirostris 176625 



Cyclops oithonoides 6005 2 5 



* * 

 * 



Melosira-¥Men 211950 



Asterionella gracillima 883125 



Polycysiis aeruginosa 100000 



Zurücktretende und vereinzelt vorkommende Species: 

 Rhaphidophrys pallida , Dinobr. divergens ^ Eudorina elegans^ Ce- 

 ratium hii'undinella, Synchaeten [tremula und pecfinata) , Aììuraeeìi [lon- 

 gispina und aculeata], Diaptomus graciloides, Fragilaria crotonensis. 



Datum: 20. October 1894. Wassertemperatur: ll°Cels. 



Volumen: 78,5 ccm (unter l qm Fläche). 



Individuen-Zahl: 



Polyarthra platyptera 105975 



Triarthra longiseta 208025 



Bosmina longirostris 160925 



Cyclops orthonoides 942 000 



* * 

 * 



Melosira-FMen 113825 



Aster ionella gracillima 894 900 



Zurücktretende und vereinzelt vorkommende Species: 

 Rhaphidophr. pallida^ Dinobr. divergens, Eudorina^ Asplanchna 

 helvetica^ Synchaeten^ Anuraeen [aculeata und cochlearis) Hyalodaphnia 

 kahlbergensis, Diapt. graciloides, Fragilaria crotonensis und Polycystis 

 aerugiiiosa. 



2. Zoological Society of London. 



4th December 1894. — The Secretary read a report on the additions 

 that bad been made to the Society's Menagerie during the month of Novem- 

 ber 1894, and called special attention to ten Surinam Water-Toads [Pipa 

 americana], presented by Mr. F. E. Blaauw, C.M.Z.S., and received Novem- 

 ber 14th; to a fine example of Pels' Owl [Scotopclia peli) from Sierra Leone, 

 presented by the Hon. C. B. Mitford, C.M.Z.S., Deputy-Governor of the 

 Colony ; and to two Tree-Kangaroos from Queensland, received in exchange 

 from the Zoological and Acclimatisation Society of Victoria, Melbourne. — 

 A communication was read from Mr. T. Manners Smith on some points in 

 the anatomy of the Water-Mole [Ornithorhynchus paradoxus). The paper 

 related chiefly to the muscular anatomy of Ornithorhynchus, which was follow- 



