April, 1<J21. 



The (Canadian P^ielo-Xatikalist. 



l.i 



Order Cladocera. 

 1^ Diaphanosoma leuchfrnberfjianum, Fis 

 eher. Frequent in plancton at 1 metre in 

 Lake Missanag, Frontenae County, Ont., 

 Aug. 30. 



^ Ilolopedium gibbcruni, Zaddach. Scarce 

 in surface plancton, Lake of Bays, Musko- 

 ka, Ont., Aug. 24. 



Daphnia pules de Geer. Well water, 

 Guelp'h, Ont. Well water, Harrow.smith, 

 Ont. Pool in woods, Aylmer, Ont. ; col- 

 lected by H. C. Wliite. 

 * Daphnia longispina hyalina, Leydig. 

 Common in surface plancton, Lake of 

 Bays^ Muskoka, Ont., Aug. 24. Abundant in 

 surface plancton, mouth of the Cataraqui 

 River, Ont., Nov. 5. 

 ' . Daphnia longispina hyalina mendotae, 

 Birge. Common in surface plancton, 

 mouth of the Catara((ui River, Ont. Nov. 5. 

 •^ tiimocephalus vetulus, 0. F. Miller, 

 Common among decaying vegetation at the 

 bottom of a shallow c/iannel in a marsji 

 on the Cataraqui River, Ont. 

 u Ceriodaphnia megalops, Sars. Scarce in 



the same habitat as the j^receding. 

 ^ Bosmina longiroatris, 0. F. Miiller. Com- 

 mon in surface plancton, Lake of Bays, 

 Aug. 24. Common in surface plancton, 

 mouth of the Cataraqui River, Ont. 



Bosmina longispina, Leydig. Common 

 in plancton at 1 metre. Lake Missanag, 

 Ont., Aug. 30. 



Alona guttata, Sars. Scarce in surface 

 plancton in shallow channel in a marsh on 

 the Cataraqui River, Out., Nov. 5. 



Chydonis sphaeiicus, 0. F. Muller. 

 Common in surface plancton, mouth of the 

 Cataraqui River, Ont., Nov. 5. 



Polyphemus pcdiodus, Linn. Fre- 

 quent in plancton at 1 metre, Lake Missa- 

 nag, Ont. 



Order Cstracoda. 

 Cypridopsis iridua, 0. F. Miiller. Com- 



m«»n among a^iuatic vegetation at mout)i 

 of the Catai-a<iui River. Ont. Common in 

 a marshy pond near Kingston, Ont. 



Cyclocypris laevis, O. F. Miiller. Com- 

 mon among filamentous algae at the mouth 

 of the Cataraqui River, Ont. 



Cypris dentata, Sharpe. Abundant in 

 a pool near Kingston, Ont. ; collected by 

 H. C. White. 



Cypris testudinaria, Sharpe. Common 

 in a pool in the woods, Aylmer, Ont., May ; 

 collected by H. C. White. 



Order Copepoda. 



Diapfomus oreg&nensis, Lilljeborg. Ab- 

 undant in plancton at 1 metre. Lake Mis- 

 sanag, Ont. Common in surface plancton. 

 mouth of the Cataraqui River, Ont. 



Cyclops biscupidutus, Claus. Common 

 in surface plancton. Lake of Bays, Ont.. 

 Aug. 24. Common in surface plancton, 

 mouth of the Cataraqui River, Out., Nov. 

 5. Common in surface plancton. Lake On- 

 tario, Dec. 15. 



Cyclops viridis brevispinosus, Herrick. 

 Common in plancton at 1 metre. Lake 

 Missanag. Aug. 30. 



Cyclops fimbriatus, Fischer. Scarce in 

 channel in mars^i at mouth of Cataraqui 

 River, Ont. 



Canthocamptus minutus, Clau,s. Scarce 

 in surface plancton. Lake Ontario at King- 

 ston, Dec. 15. 



N. B. — Since the above was written, 

 copies of Parts H and J of Vol. 7 Report 

 of the Canadian Arctic Expedition con 

 taining records of Arctic Cladocera by 

 Dr. Juday and Copepoda by Dr. Marsh 

 have come to hand.^ 



1 Dr. Robert Chambers in Biological Bulle- 

 tin, Vol. 22. p. 293. mention.s the occurrence 

 of Cyclops parens and C. Americanus at To- 

 lonto. The Kiiphyllopoda and parasitic Cope- 

 poda have not been considered. — Ed. 



