SEA-FISHERIES LABORATORY, 241 



Invertebrates caught. 



Mollusca: — Nucida, Scaphander lignarius (feeding on 

 Nucida), Mactra stidtorum, Psammobia sp., Natica catena 

 (one specimen var. alba), Loligo media (very numerous), 

 Sepiola atlantica, Rossia macrosoma, Pltiline aperta, Natica 

 spawn. 



Crustacea : — Corystes, Port units, Atelecyclus lieterodon. 

 Echinoderms : — Ophiura spp., Asterias rubens, Echinus 

 escidentus and E. miliaris. 



Just outside Fishguard Bay, in water of 16^ to 20 

 fathoms, we had another haul with the shrimp trawl on 

 the 24th June. The results were : — 

 Dabs : 2, 7|-in. to 9in. 

 Whiting: 4, 71in. to llin. 

 Raia maculata : 2, 14|rn. to 15^in. 

 Sand eel : 1, Gin. 

 Onus tricirrhata : 3, Gin. 

 Gadus minutus: 33, 3in. to 5in. 

 ' Shrimps : 1 specimen. 



Callionywius lyra : not abundant. 

 The invertebrates were very few indeed. One 

 specimen of Pasiphea sivado was taken ; Loligo media was 

 numerous ; Pecten opercidaris, Echinus escidentus and 

 E. miliaris were the only other invertebrates noticed. 



It is interesting to compare the three closed areas : 

 Luce Bay, Blackpool Closed Ground, and Fishguard Bay. 

 In the former we have a rich fish fauna (rich in point 

 of number and species) and a peculiar distribution of 

 plaice and other fiat fishes in respect of sizes -plaice of 

 all sizes being found on the same shallow-water area. 

 Blackpool Closed Ground presents a great abundance of 

 individuals belonging to a very few species, and this 

 it 



