362 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



rate, the present sample is the coarsest that I have examined. 

 It is composed almost wholly of small stones and large shell- 

 fragments, and would be termed a " shelly " deposit. Few 

 complete valves are present, but the fragments are sufficiently 

 large and fresh in most cases to make their identification 

 possible. The genera recognised are :-'-Pecten, Cardium 

 (many), Nucula, Mactra,Donax, Emarginula, Trochus, Balanus, 

 Mytilus and Venus. 



The stones, which are numerous, are fairly uniform in 

 size — that of a small pea — and well water- worn. No sign of any 

 growth of any kind is seen upon their surfaces, and, as the 

 deposit is an absolutely " clean " one, I imagine the tides and 

 currents are pretty strong, and consequently there follows a 

 proportional amount of erosion on the sea-bottom. 



Besides shells and stones, grains of quartz are also found 

 in fair abundance. These grains are large, composed of rock 

 crystal, and most of them are well-rounded. They are really 

 too large to be termed grains in the general acceptance of the 

 term. 



Branching polyzoa, small Spatangus, several Echinocyamus 

 pusillus, tubes of Sabellaria and Serpula, as well as echinoid 

 spines are of pretty frequent occurrence. 



XXI. [21.] 29/5/13. Red Wharf Bay. 



Two samples were obtained from this station on the above 

 date. As they are identical in every way, the same description 

 will stand for both. 



The deposit consists of a fine sand, composed of small 

 quartz grains and finely comminuted shells. The quartz 

 grains are mostly fairly well water- worn, but angular particles 

 are of frequent occurrence. Many of them are coloured by 

 iron oxide. Magnetite or titanoferrite is pretty common as 

 black specks. The fine state of comminution of the shell 

 fragments is due to the fact that the majority of these are 



