The Polychaetes Collected by the Canadian Arctic Expedition, 1913-18. 



By RALPH V. CHAMBERLIN. 

 Museum of Comparative Zoology, Cambridge, Mass. 



Polychsetes were collected by the Canadian Arctic Expedition at various 

 points along the North American Coast from southern Alaska northward and 

 eastward to Bathurst inlet, Northwest Territories, by far the greater amount 

 of material coming from the regions about Grantley harbour (port Clarence) 

 and Collinson point, Alaska, and from Dolphin and Union strait and particularly 

 Bernard harbour, Northwest Territories. Twenty-five species were represented 

 in the material secured east of the mouth of the Mackenzie river and twenty-two 

 from the region west of this point. By far the greater part of the material 

 was taken along shore at small depths. A few forms are pelagic and a few 

 were dredged from a depth of a hundred meters in Dolphin and Union strait. 

 The pelagic forms include several spionid larvae and one larval Paranaitis. 

 The specimens were collected by Mr. F. Johansen on the expedition from 1913 

 to 1916. 



This report covers also some other annelid material from northern regions 

 received for identification from the Canadian Geological Survey, this embracing 

 collections made in Hudson bay and Hudson strait by the Neptune and Diana 

 expeditions, a few forms from the eastern side of Hudson bay collected by 

 A. P. Low, and several additional forms from British Columbia and Halifax. 



As was to be anticipated, the species represented are for the most part 

 well-known and mostly widespread arctic and subarctic forms, the polychgete 

 fauna of the Arctic being one of the longest studied and best known in the 

 world. All the species taken by the Arctic Expedition east of the Mackenzie 

 river were forms previously well known from Greenland and other arctic locali- 

 ties. West of the Mackenzie, where the rich Bering Sea fauna was approached 

 or entered, the collections yielded seven previously undescribed species. In 

 addition a new Nepthys is described from material taken by the Neptune in 

 Hudson bay and a new Chone from that taken by the Diana in Hudson strait. 

 Thus the report includes descriptions of nine new species from the total of 

 forty-nine. The following lists indicate the forms secured at the several general 

 localities. 



BRITISH COLUMBIA. 



Halosydna lordii (Baird). . 

 Serpula vermicularis Linne. 



PORT CLARENCE, ALASKA. 



Harmothoe imbricata (Linne). 



Arctonoe lia, n. sp. 



Paranaitis sp., larvae. 



Psammate aphroditoides (Fabricius). 



Spionid, larva. 



Cistenides granulata (Linne). 



COLLINSON POINT, ALASKA. 



Antinoe sarsi Kinberg. 

 Ephesiella minuta (Webster and Bene- 

 dict). 



Spio mimus, n. sp. 

 Scolecolepides arctius, n. sp. 



71927 1J 



Anaspio boreus, n. sp. 

 Terebellides stroemi Sars. 

 Ampharete johansem, n. sp. 

 Ampharete reducta, n. sp. 



OTHER ALASKAN LOCALITIES (MOSTLY 

 SOUTH OF POINT BARROW.) 



Aphrodite sp. (Beaufort Sea, Sta. 29/.) 



Autolytus prismaticus (Fabricius). (Sta. 

 6, 14, 17, 21, 57a.) 



Autolytus alexandri (Malmgren). (Sta. 

 17). 



Spionid, larva Bb. (Martin point, 

 Sta. 32c). 



Terebellides stroemi Sars. (Sta. 23). 



Samytha sexcirrata (Sars). (Sta. 23). 



Ampharete eupalea, n. sp. (Sta. 23). 



Circeis spirillum (Linne) (Prince Wil- 

 liam sound, Sta. 60a). 



