464 THE DEPTHS OF THE SEA. [CHAP. ix. 



V. WOOD, also common to Norway and Shetland, 

 is found fossil in the coralline and red crag, and 

 Ffiffus sarsi, JEFFREYS, common to Shetland and 

 Norway, is found fossil at Bridlington. 



Several species have hitherto been known only 

 from the south, and Mr. Jeffreys finds a difficulty 

 in accounting for their presence. Thus, Tellina com- 

 pressa, BROCcni, is known from the Canary Islands 

 and the Mediterranean, and is fossil in the newer 

 Italian tertiaries. Feriicordia acuticostata, PHILIFPI, 



FIG. 7(5. Kucchinpsis striata, JEFFREYS. FIG. 77. Latimsalbus, JEFFREYS. 



Fieroe Channel. Twice the natural size. F&roe 



Channel. 



I have already referred to as being found on the 

 coasts of Portugal and of Japan. It is a common 

 fossil in the coralline crag of Calabria. The mol- 

 lusca which are of the most special interest, how- 

 ever, are those which we must refer to the abyssal 

 fauna. About this group we know as yet very 

 little. Like the Echinoderms, they seem to be special, 

 and to have a wide lateral extension. Pleuronectia 

 lucid a, JEFFREYS (Fig. 78), a pretty little clam be- 

 longing to the Pecten plevronectes set, is figured 

 both from the North Atlantic and from the Gulf of 



