FOOD OF POST-LARVAL FISH. 437 
To show that a certain amount of selection does take place a list was 
made of the food inside the fish from 2 hauls, and the food of each fish 
noted. For this purpose Hauls XIII and XIIla were selected, both with 
the Young Fish Trawl, 1914. Haul XIII May 19th, 11.35 p.m. Mid- 
water, Eddystone, N. 64, 39 fms. Haul XIIla May 22nd, Eddystone, 
S.W. 3 miles, 28 fms. 
Haul Xn 
Contained the following fish :— 
406 Clupea sp. 1 Arnoglossus sp. 
1 Ammodytes sp. 84 Scophthalmus norvegicus. 
8 Gadus merlangus. 1 Zeugopterus unimaculatus. 
7G. luscus. 4 Z. punctatus. 
158 G. minutus. 48 Solea variegata. 
5 Onos mustela. 5 Gobius sp. 
1 Labrus bergylta. 150 Crystallogobius Nillsoni. 
70 Pleuronectes limanda. 13 Trigla sp. 
55 P. microcephalus. 20 Callionymus lyra. 
These contained the following food:—  ~ 
DIATOMACE. CIRRIPEDIA. 
Paralia sulcata. Balanus nauplii and cypris 
Pleurosigma sp. stages. 
Navicula sp. 
Guinardia flacerda. 
Lauderia borealis. 
CLADOCERA. 
Podon (cf. intermedius). 
COPEPODA. 
PERIDINIALES. Z, Nee 
Dinowhuss Calanus finmarchicus. 
peed os SB: Pseudocalanus elongatus. 
Diplopsalis lenticula. 
Prorocentrum micans. 
Peridinium ovatum. 
Metridia lucens. 
Paracalanus parvus. 
Temora longicornis. 
P. pallidum. Acartia (cf. Claust). 
P. cera 
pega: Oncea (cf. media). 
P. sp. 
EE Coryceus anglicus. 
INFUSORIA. Buterpina acutifrons. 
Tintinnopsis ventricosa. Also ova. 
The Diatoms and Peridiniales were nearly all inside the Copepods. 
The Copepods chiefly taken were Pseudocalanus, Temora, Euterpina 
and Metridia. Solea variegata and Pleuronectes limanda ate chiefly 
Podon and Temora, Solea also eating Euterpina, Oncea, Coryceus and 
Balanus \arvee, neither containing Pseudocalanus. On the other hand 
Pseudocalanus was the chief food of Scophthalmus norvegicus, which 
hardly ever took Temora, but in addition to Pseudocalanus contained 
