CHAP, iv.] THE CR UISES OF THE l PORCUPINE.' 153 



a bottom temperature of 5* 2 C. We were thus in 

 the warm area, and the dead-cold water of the cold 

 area lying fifty or sixty miles off, with the bottom 

 at a higher level, was completely banked in. The 

 bottom temperature here corresponded so closely 

 with that of the same depth in the Eockall Channel 

 that apparently scarcely a drop of the Arctic in- 



FIG. 20. Zoroaster fulgens, Wrvima: THOMSON. One-third the natural size. (No. 78.) 



draught makes its escape in this direction. The 

 dredge here brought up half a ton of Atlantic 

 * globigerina ooze,' a load which tested its tackle 

 and the donkey-engine to the utmost. The weight 

 of the dredge itself with the weight attached was 

 8 cwt., so that altogether the burden reached not 



