COPEPODS OF THE WOODS HOLE REGION 



335 



the close appression of the ovisacs to the sides of the urosome, so as 

 to conceal much of the surface of the latter in dorsal view. It is 

 apparently a true bottom form and is very agile, darting about among 

 the debris on the bottom so rapidly that it often escapes capture. 



MACROCYCLOPS ALBIDUS (Jurine) 



FiGUBE 199 



Monoculus quadrioomis albidus Jurine, Hist. Monocles, pp. 44, 47, pi. 2, figs. 10, 



11, 1820. 

 Cyclops annuUconiis Koch, Deiitschlands Crustaceen, Myriapodeu und Arach- 



niden, pt. 21, pi. 6, 1838. 

 Pacliycyclops annulicornis Saks, Crustacea of Norway, vol. 6, p. 68, pi. 42, 



1914. 



Occurrence. — Found in moderate abundance in Mill Pond at 

 Woods Hole, in Salt Pond and Oyster Pond, Falmouth, in Sidleys 

 Pond, Falmouth Village, and Little Pond, Falmouth Heights, in 

 small pond near the outlet of John Pond, Mashpee, in two small 



FiGUEB 199. — Macrocyclops aVbidus: a, Male, dorsal ; 6, male, 

 first antenna ; c, male, fifth leg ; dj male, sixth leg ; e, female, 

 fifth leg 



ponds on the main road west of Chatham, and in the pond on Rams 

 Head Island in Hadley Harbor. 



Distribution. — Germany (Koch, Schmeil) ; Europe, northern 

 Asia, central Africa, Australia, Hawaiian Islands, Norwegian lakes 

 (Sars) ; Turkestan (Uljanin) ; Poland (Lande) ; British Isles 

 (Baird, Brady) ; Switzerland (Heller) ; Russia (Poggenpol) ; Neth- 

 erlands (Hoeck) ; North America (Herrick, Marsh, E. B. Forbes) ; 

 Massachusetts (Cragin). 



