34 K Canadian Arctic Expedition, 1913-18 



Station 42p. See under Pseudocalanus. Several examples comprising males 

 and females. Length of one male 1-2 mm. When the body is viewed from the 

 side, without further preparation, it can be observed that the ectal spinules or 

 spinules on the outer surface of Re 1 in p2-p4 are arranged in three oblique rows : 



Fig. 49. H. wdrcmi.s. First paii- of legs and second maxiUiped 

 (of right side) in position. Station 50d. 



this is indicated in a figure by Sars. The anterior antennae of the male present 

 a distal expansion followed by a movable finger (dactylus) which is furnished 

 with a smooth spur projecting forwards, as described and figured by Sars; in 

 certain aspects the spur looks like the main body of the joint. 



Station 50d. Young point, Dolphin and Union strait, Northwest Territories, 

 in beach water amongst algse, July 21, 1916. There were three Harpacticoids 

 in the vial, one Idywa furcata, and two H. uniremis 9 . One female carried an 

 ovisac, and there was a loose ovisac in addition; length of 9,1-3 mm. In the 

 thoracic legs, p2 Ri 2 has two si; p 5 with 4 marginal spines on the inner 

 expansion and 5 on the distal lobe. 



Sars finds that the H. chelifer var. arcticus described from Bering Sea on 

 floating kelp by S. A. Poppe (Arch. f. Naturgesch. 50, 1884) belongs to H. 

 uniremis. According to the same author, it is found along the whole Norwegian 

 coast, but only in depths of 20 to 100 fathoms. L. W. Williams found it in 

 Narragansett Bay abundant in tow-nettings in shallow water,^ and I have 

 found it amongst the stomach contents of the winter flounder at St. Andrews, 

 N.B. It has not been taken at Woods Hole.^ 



27. Idyaea furcata (Baird). 



Station 20o. See Table IX. One female. 



Station 40r. See under Acartia longiremis. Several females, one with 

 ovisac, 1-03 mm., another 1-00 mm., another 0-80 mm., and a fourth 1 • 05mm.; 

 relative lengths of Th 5, Ab 1-4, and furca: 10, 15, 10, 9, 8, 6. The first and 

 second maxillipeds when seen in situ appear much alike, uncinate; the anterior 

 with larger claw, biarticulate; the posterior, three jointed, the claw itself having 

 an intercalary joint at its base. 



Station 41s. See Table VI. 



' L. W. Williams: Notes on marine Copepoda of Rhode Island. Amer. Nat. 40, p. 653-4, 1906 

 =R. W. Sharpe: Copepoda ot Woods Hole. Proe. U.S. Nat. Mus. .38, pp. 405-436, 1910. 



