4 K Canadian Arctic Expedition, 1913-18 



Stations 18a, c,e,/,: 62° N., 167° 30' W., four gatherings witii net No. 3\ 

 towing at surface for 5, 10, and 15 minutes, preserved in one vial, July 7, 1913. 

 The quantity was small for the time employed in towing. It may be called an 

 Acarfc-plankton, since that genus was in the ascendant. There were also more 

 than one hundred young Amphipods (Hyperidea), twenty-four crab larvse 

 (Zoese), and a few fish-larvse. 



The following century of copepods, exclusive of the Acartia, was made out : — 



Table I (Sta. 18, excl. Acartia). 



Calanus finmarchicus &, 3-75 mm 1 



Psevdocalanus elongatus 5 



Centropages mcmurrichi 9 1 



Eurylemora herdmani (c? and 9 ) 40 



Paralabidocera amphitrites (all young) 52 



Tmlanus discaudaius 9 1 



100 

 Station 21a, b, c: 68°30' N., 166° 32' W., temperature 45.6° F., August 

 15, 1913. Three gatherings of five minutes each at surface, with net No. 2^, 

 yielded a fairly copious plankton of small Cladocera {Evadne and Podon), 

 Molluscan larvae. Annelid larvae. Medusae, 1 crab-larva (Megalopoda), young 

 Amphipoda and some Copepods (table II). The station lies north of Bering 

 strait, but south of the Arctic circle. The composition of the gathering 

 indicates current action through the narrow strait. 



Table II (Sta. 21a, h, c). 



Calanus finmarchicus, stages IV and V 2 



Pseudocalanus elongatus (chiefly 9 ) 25 



Centropages mcmurrichi 2 



Paralabidocera amphitrites (cf and 9 ) 15 



Eurytemora herdmani (chiefly cf) 25 



Eurytemora johanseni (cT and 9) 9 



Acartia longiremis 10 



Acartia clausi 10 



Oithona similis 2 



100 



Station 255, c: oif Cooper island (point Barrow), Alaska, within the Arctic 



circle; depth two fathoms; August 27 and 28, 1913. Two gatherings of ten 



minutes each with net No. 3, at surface among ice, contained some very young 



Calanus. 



Table III (Sta, 256, c). 



Calanus finmarchicus I 3 



Calanus finmarchicus II 3 



Calanus finmarchicus III 2 



Calanus fiuTnarchicus IV .... 2 



Pseudocalanus elongatus 24 



Acartia (clausi and longiremis) 60 



Oithona similis 3 



Harpaclicus (immature) 2 



Danielssenia fusiformis 1 



100 



Station 27r: Collinson point (Camden bay), Arctic Alaska; depth 1 to 2 

 fathoms; Octobef 2, 1913. A short haul with catcher^ from one fathom to the 

 surface, under ice ten inches thick, captured a male of Metridia longa in company 

 with C. finmarchicus V, and young Pseudocalanus. 



^ This plankton net was made of coarser silk, closed at the end, nine inches wide at the mouth, twenty 

 inches long. 



' Full-speed net of fine silk, two inches across mouth, two feet long, with bottle at end. 

 ^ See footnote p. 6 k. 



