Yol. 6S.'] DREDGED PEOM THE DOGGER BANK. 325 



In a recent letter (May 8th), received from Capt. Foot, he says : — 

 ' I find : 



" Moorlog- and hgbt-coloured claj in | j^^^^_ go ^q/ ^^ 30 15' e. 



,. ,^ 1 „ . , , w • / Lat. 55° 10' to 55° 20' N. 



"Moorlog, dark clay, and stones m... i -j^^ 2° 30' to 2° 45' E. 



.< liT 1 ,> • / Lat. 54° 50' N. ^ 



Moorlog m I Long. 4° 40' to 4° 55' E. 



-r . w , , , . / Lat. 55° 55' N. 



Light-blue clay m | Long. 5° 35' E.' 



The actual specimens of ' moorlog ' and associated shelly clay, 

 which I received from CaiDt. Foot, were dredged in lat. 55° 24' N., 

 and long. 3° 10' E., at a depth of 20 fathoms. 



The position of these places in relation to the Dogger Bank is 

 shown on the accompanying sketch-map. 



Map showing the localities ivhere ' moorlog,^ etc. luas dredged. 



[1 = Pale-blue clay ; 2 = ' Moorlog ' and light-coloured clay ; 3 = ' Moorlog,' 

 with dark shelly clay; 4=' Moorlog/ with dark clay and stones; 5= 

 * Moorlog.'] 



The clay is almost black when wet, but lighter in colour when 

 dried. It consists mainly of sandy and silty particles, so fine in 

 texture as to give a clayey character to the mass, and is not unlike 

 some of the varieties of mud found in the lower reaches, of the 



