4 B Canadian Arctic Expedition, 1913-18 



are very large, particularly in comparison with the relatively enormous size 

 ot the buccal mass. Such structures should surely be identifiable with the 

 passage of time — consequently it seems worth while to add figures of the 

 four fragments aissected from the best preserved of the buccal masses. It is 

 not, however, a glad commentary on the sufiiciency of our knowledge regarding 

 animals possessing such iniportance in the economy of the sea as these, that 

 without more complete specimens or a better base of attack than is afforded 

 by the literature, one dares not risk a guess at even the genus or family of 

 cephalopods represented by the fragments. 



[l727] 



1 mandible from stomach of Phoca hispida Schreber, station 29/, about 

 30 fathoms, lat. 70° 13' N., long. 140° 50' W., a little east of Alaska- Yukon 

 boundary, April 4, 1914. 



A single dorsal mandible from the same stomach as the specimens entered 

 as No. 726 is larger than the others, altogether differently shaped, and entire. 

 Its cutting edge is sharp ana strongly curved, as in many decapods (Fig. 2). 

 It clearly represents a quite different species. 



5 *Tim. 

 Fig. 2. — Mandible of cephalopod fromJStation 29/ [727], camer.a outline. 



[17281] 

 1 mandible from stomach of Erignathus barbatus (Erxleben), Station 42m, 

 •Bernard harbour, Dolphin and Union strait, Northwest Territories, October 22, 

 1915. 



This is a single dorsai mandible someAvhat resembling No. 727, but with 

 the cutting edge appreciably shorter and stouter (Fig. 3). This specimen, 

 which is preserved dry, is very likely representative of a third species. 



Fig. 3. — Mandible of cephalopod from Station 42u [728], camera outline, same scale as Fig. 2. 



In the diary of Captain Robert A. Bartlett, Report of the Department of 

 the Naval Service for the Fiscal Year ending March 31, 1915, Ottawa, p. 35, 

 there is an entry under Nov. 21st, (1913): "10 a.m. Sounding, 36 fathoms. 



Dredge to-day secured an octopus Lat. 72° 56' — Long. 163° 54'W. 



at 5 p.m." All the specimens secured by Mr. James Murray, marine biolog'st 

 and the scientific staff of the Karluk during the drift northwest of Alaska in 

 1913 were lost with the ship north of Herald island, on January 11, 1914. 



