FOOD OF POST-LARVAL FISH, 445 
small mouth with a long and narrow gullet and stomach and an early 
more or less vegetarian diet, only going on to Entomostraca at a much 
later stage. (See Figs. 1-6.) 
The large-mouthed forms do not all take the same kind of Crustacean 
food, but certain groups seem to do so. Thus Solea variegata, S. vulgaris 
and S. lascaris, Pleuronectes limanda, Zeugopterus punctatus and Z. 
unimaculatus take much the same sort of food, but Scophthalmus nor- 
vegicus differs in taking Pseudocalanus and Metridia chiefly, forms hardly 
Fic, 2.—Post-larval Pleuronectes limanda, 12 mm. long, from a 
balsam preparation. Right eye seen through from left side. 
taken at all by those mentioned above, Pseudocalanus on the other hand 
being the chief food of the larger post-larval Arnoglossus. 
SOLEA VULGARIS QurEnsext. Common So te. 
Fourteen specimens examined, preserved, from Young Fish Trawl, 
1914, 5-5 to 9-5mm. The smallest contained Copepod remains, 3 con- 
tained nothing, 2 were indistinguishable and 2 contained ova. The 
rest contained Copepods (Temora and Euterpina and Oncea), Balanus 
cypris stage and one contained a Prorocentrum micans. A. Scott (1906) 
