6 K The Canadian Arctic Expedition, 1913-18 



two pairs of swimming feet; at stage II, three pairs;' at stage III, four pairs. 

 One C. finmarchicus II was 1-52 mm. long; and one of stage lY measured 3-5 

 mm. 



Station 43e: Dolphin and Union strait, off Stapylton bay, depth about 25 

 fathoms, net No. 3, ten minutes at surface, September 14, 1915. The niaterial 

 contained a quantity of phytoplankton and copepod pupae, the latter dominating 

 the zooplankton. Fritillaria and Pluteus were also present. The air temper- 

 ature was 23° r., and the water temperature 30-8° F. 



Table VII (Sta. 43e). 



Calanus finmarchicus 1 12 



Pseudocalanus elongatus 9 12 



Pseudocalanus elongatus 9 juv ■ ■ • 12 



Pseudocalanus elongatus <? juv.' 20 



Eurytemora herdmani 9 1 



Eurytemora herdmani <? 5 



Acarlia longiremis 9 1 



Acartia longiremis c? 16 



Oithona similis 20 



Amphiascus nasutus cf 1 



100 



Station 57a: Cape Smyth (point Barrow), Alaska, depth 3 fathoms, August 

 8, 1916; secured by the catcher': — ■ 



Calanus finmarchicus IV 1 



Calanus finmarchicus V 2 



Calanvs finmarchicus 9 2 



2. Calanus hyperboreus Kroyer, 1838. 



Besides the occurrences of this species noted in Tables IV,. V and VI, there 

 are several other records to be mentioned. 



Station 27j/l: Lagoon at Collinson point Alaska, in 1-2 feet of water, no 

 ice, October 8, 1913, catcher. One C. hyperboreus V, length 5-6 mm. The 

 lateral lobes of the last thoracic segment were triangular and bluntly pointed, 

 so that doubt might be entertained about its identification until the fifth legs, 

 with 17 coxal teeth, were examined. The inner and outer branches of the fifth 

 legs were 2-jointed; the remaining natatory legs had both rami 3-jointed. The 

 anterior antennae were 25-jointed, joints 8 and 9 being feebly separated. 



Station 286: Collinson point, Alaska, depth one fathom, ice 12 inches thick, 

 'October 14, 1913, catcher. One C. hyperboreus IV, length 4-7 mm. was taken 

 The abdomen was three-jointed; p 5 Re and Ri, one-jointed; the remaining 

 legs had two-jointed rami. The jointing of the antennae and mouth-parts was 

 the same as in the adult, joints 8 and 9 of the anterior antennae being imperfectly 

 divided. 



Station 28f: Same locality, ice 16 inches thick, October 21, 1913. One 

 female of 8 mm. was taken in the catcher. 



Station 29g3: 70° 20' N., 140° 30' W., depth 150 fathoms; vertical haul 

 with net number 5 from 50 to 150 fathoms, April 6, 1914. Two mature females 

 measuring 7-5 and 8-5 mm. in length. 



Station 30a: 69° 41' N., 141° 11' W., off Demarcation point, Alaska, about 

 300 yards offshore, depth 3 fathoms. May 4, 1914. Six vertical hauls with 

 net number 3, from surface to bottom, through a hole in the ice which was six 

 feet thick. The total number of copepods preserved was 74, distributed as under. 



* The bag of the catcher was made of bobinette, having wider meshes than any of the plankton nets 



