-HAP. in.] THE CRUISES OF THE ' PORCUPINE: 111 



ieep, flowing in a south-westerly direction, beneath 

 in upper stratum of comparatively warm water 

 noving slowly towards the north-east ; the lower 

 lalf of the latter, however, having its temperature 

 3onsiderably modified by intermixture with the 

 stratum over which it lies." l 



Our next few dredgings were on the Shetland 

 )lateau, in depths under 100 fathoms, and over 

 round already carefully worked by our colleague 

 Mr. Gwyn Jeffreys. We got few novelties, but 

 >wing to our very effective dredging appliances we 

 ook some of the ( Haaf ' rarities, such as Fusus nor- 

 *eyicus, CHEMN. ; Fusus berniciensis, KING ; Pleuro- 

 l oma carinatum, BIVONA ; in considerable numbers. 

 The hempen tangles stood us in good stead with the 

 ^chinoderms. On one occasion the dredge brought up 

 it a single haul, in the bag and on the tangles, cer- 

 r ainly not less than 20,000 examples of the pretty 

 ittle urchin, Echinus norvegicus, D. and K. 



[la 



On the 28th of August we anchored in Lerwick 



rbour. We remained at Lerwick several days 

 making in necessary supplies, looking at the geology 

 md the many remarkable antiquities of the neigh- 

 )ourhood, and ransacking the haberdashers' shops for 

 those delicate fleecy fabrics of wool which imitate in 

 |i scarcely grosser material, and with almost equal 

 lelicacy of design, the fretted skeletons of Holtenia, 

 Euplectella, and Aplirocallistes. 



In this earlier part of the cruise nearly all the 

 iredgings had been confined to the cold area, and 



1 Dr. Carpenter, in " Preliminary Report on the Scientific Explora- 

 ion of the Deep Sea, 1869." (Proceedings of the Koyal Society, vol. 

 p. 441.) 



