CRUSTACEA. 107 



COPEPODA. • EUCOPEPODA. 



CYCLOPIDAE. 



1, p. 209, pi. 11, figs. 6-7. "die EiisrHEiMiscHEN Cyclopiden." 

 E. B. Forbes, Bull. 111. state lab. nat. hist., 1897, vol. 5, p. 44, pi. 

 12, figs. 1-4. 



Mass. — Boston and Cambridge in the water-supplies, easily 

 obtainable from the faucets in any house ; Cambridge, in rain- 

 pool near Museum of Comparative Zoology ; Woods Hole. 



349. Cyclops axbidus (Jurine). 



Monocuhcs quadricornis alhidus Jurine, Histoire des Monocles, 

 qui se trouvent aux environs de Geneve, 1820, p. 44, pi. 2, figs. 



10 & 11. "SUBTOUT DAXS LES MAKES VOISIXES DU ChATEAU- 

 BLANC." 



Cyclops alhidus (subgenus Macrocyclojys) E. B. Forbes, Bull. 

 111. state lab. nat. hist, 1897, vol. 5, p. 47, pi. 13. 



Mass. — About Cambridge. Quite common. 



350. Cyclops seerulatus Fischer. 



Cycloids serrtdatus Fischer, Bull. soc. imp. nat. Moscou, 1851, 

 vol. 24, no. 4, p. 423, pi. 10, figs. 22-23. "Seegiefskoje," 

 NEAE St. Peteesbueg. 



Cyclops serrulattis (subgenus Eiicyclops) E. B. Foi'bes, Bull. 

 111. state lab. nat. hist., 1897, vol. 5, p. 54, pis. 17 & 18, figs. 1-3. 



Me. 



Mass. — About Cambridge, common in ponds, ditches and 

 rain-pools ; Woods Hole. 



351. Cyclops prasixus Fischer. 



Cyclops prasimis Fischer, Abh. k. bayeiisch. akad. wiss., 

 1860, vol. 8, p. 652, pi. 20, figs. 19-25, 26a. " Ffxchal 

 (Madeiea), * * * Bade^-Badex." E. B. Forbes, Bull. 111. state 

 lab. nat. hist., 1897, vol. 5, p. 57, pi. 19, figs. 1 & 2, pi. 20, figs. 1 

 & 2. 



