162 DREDGINGS OF THE MARINE BIOLOGICAL ASSOCIATION: 



reimissent Jersey ainsi que les autres iles anglo-normandes ; de plus 

 elles reunissent la Bretagne au Cornouailles et le Cotentin au Sud de 

 rAngieterre. Elles sont decoupees suivant des echarpes tres irregu- 

 lieres ; non-seulement elle longent les cotes, mais elles traversent com- 

 pletement la Manche, se poursuivant jusque dans les parties les plus 

 basses de son bassin et meme jusque dans son thalweg." 



" Ces roclies sont assurement tres variees ; cependant entre la 

 Bretagne, le Cotentin, le Cornouailles, et le Devonshire, elles appar- 

 tiennent au granite et au terrain de transition. Les Bondages font 

 connaitre qu'elles sont en partie formees de pierres desagregees ; qu'en 

 outre les roches pourries sont frequentes autour de 49° 5' latitude et 

 de 7° 10' longitude, dans le thalweg de la Manche." 



Finally, when we deal with the boulders from the Salcombe-Eddy- 

 stone grounds we have Mr. Hunt's opinion.^ 



" My own contention being that they [the boulders] are to all 

 intents and purposes in situ. 



" The problem of origin is certainly a perplexing one. Those who 

 maintain a distant derivation have to show where the blocks came 

 from, and how they came. 



" Those who contend for a local submarine origin have to explain 

 how such solid blocks could have become detached from the parent 

 beds. 



" That trawls could detach the blocks from their beds is as possible 

 as that ' Old Noll ' fired them at the seagulls ; but that trawlers 

 could have dragged them about all over the Salcombe fishing grounds 

 when detached is practically certain. Thus none of the detached 

 blocks have any claim whatever to be considered in situ when caught, 

 though they may fairly claim, I think, to represent rocks forming the 

 bed of the Channel not far distant. 



" However, it is clearly impossible to prove that some of them may 

 not have been ice-borne. Let those who maintain that theory show 

 cause for their belief." 



We are somewhat more favourably situate now than when either of 

 the above extracts left the hands of their authors. As regarding a 

 definite line, from Plymouth Sound, past the Eddystone to a distance 

 of nearly fifty miles from the latter, we have absolutely located and 

 perfectly representative samples of the bottom deposit. From the 

 2 5 -fathom line to the 3 5 -fathom line these have been worked out in 

 detail. Broadly speaking, the results are that we now know the 

 Eddystone and, in part, the Hand Deeps to stand above the general 



' "The Subiiiariiie GeoIoi,'y of the Eiiglisli Cliaiiiiel otl" the South Coast of Devon," 

 Trans. Dev, Assoc, 1889> p. 484 el seq. 



