Cod (July, Piel I.) Gamma rus mari)ius,Sphmroma 



serration, Corophium grossipes. 

 Cod (Sept., Morecambe) Gammarus marinus, Batliy- 



poreia pilosa. 

 Whiting (Aug., Morecambe) Idotea marina, Bathyporeia 



pilosa, Corophium grossipes. 

 Whiting (Aug., R. Dee) Diastylis ratlikei, Atylus 



swammerdamii. 

 Whiting (Aug., R. Dee) Cuma scorpioides, Diastylis 



ratlikei. 

 Whiting (Sept., Morecambe) Bathyporeia pilosa (including 



B. pelagica and B. robert- 



sonii) ,A tylus swammerdamii, 



Microprotopus maculatus. 

 Whiting (Sept., Morecambe) Bathyporeia pilosa, Atylus 



swammerdamii. 

 Whiting (Oct., Garston) Atylus swammerdamii. 

 Whiting (Oct., Morecambe) Corophiitm grossipes, Sphce- 



roma serratum. 

 Pogge (Oct., Morecambe) Pseudocuma cercaria, Ponto- 



crates arenarius. 

 Pogge (Oct., Rock Ch.) Atylus swammerdamii, and 



some young shrimps and 



prawns. 

 Skate (Aug., R. Dee) Gastrosaccus spinifer. 



Mr. Walker adds that it is remarkable that all these 

 Crustacea are shallow water forms. Most if not all of 

 the species inhabit a sandy bottom. One, Corophium 

 grossipes, inhabits mud banks which are bare for hours 

 every day and sometimes for two or three days together 

 during neap tides in the Dee, where there are several 

 square miles closely perforated with their holes. It is a 

 surprise also to find Diastylis ratlikei occurring so fre- 

 quently. The absence of two of the commonest species 



