of the Fishery Board for Scotland. 28 
fishes (Gadoids chiefly) or of crustacea (chiefly Hupagurus bernhardus, but 
one or two other species of Hupagurus, Nephrops, etc., were also occasionally 
present). The stomachs containing crustacea only, numbered about 65, and 
those containing fish only, numbered about 43. In eight halibut stomachs 
the food contents iicluded a whiting and one or two small shell-fish. Another 
contained the remains of four or five Munida bamffica and a small cuttlefish 
(AZledone), while a third contained Nephrops and Gadus (?) esmarkii. The 
entire contents of one stomach consisted of cuttlefish, one contained Annelids 
only, and one part of a large Pusus antiquus. 
The Gadoids met with most frequently consisted for the most part of - 
haddocks and whitings, a few of which were of fairly large sizeand measured 
10, 11, and 12 inches in length. The remains of herrings were also 
occasionally noticed ; one stomach contained a herring 9 inches long and a 
fairly large cuttlefish—Loligo vulgaris. Another contained a herring about 
7 inches long, which was sufficiently perfect to show that it had been feeding 
largely on the Schizopod ZVhysanoessa neglecta before being captured by 
tne halibut. 
Among the crustacea observed, the hermit crab (Hupagurus bernhardus) 
was, as stated above, the more common form, but one or two specimens of 
Eupagurus pubescens and Hupagurus cuanensts also occurred. The few 
Portuni observed were limited to P. holasatus and P. depurator. Two of 
the stomachs examined in December contained each a specimen of Geryon 
tridens, and one or two small Atelecyclus were also noticed. 
DIFFERENCES IN THE Foop oF LARGE AND SMALL FISHEs. 
The only appreciable difference that could be observed in the food of the 
larger halibut was that fishes appeared to be more frequently consumed, 
while the smaller preyed more upon crustacea. 
The stomachs examined in December were, for the most part, from halibut 
three feet in length, and only a few from specimens over that size. 
January 1910. 
In January 1910, 91 halibut stomachs were examined, and 59 of these 
contained food that could be identified; none of the halibut were over three 
feet in length. The food contained in 31 of the stomachs consisted entirely 
of fishes, 19 contained crustacea only, while in the remaining 11 the food 
consisted partly of fish, partly of crustacea, and also occasionally with the 
remains of small cuttlefish. 
FISHES. 
The fishes observed belonged, for the most part, to the Gadoids, chiefly 
haddocks and whitings, some of which were of tolerable size. In one stomach 
the remains of two haddocks between 10 and 11 inches long were observed, 
and a whiting 14 inches in length occurred in another, while in a third there 
were two specimens of a coal-fish partly digested, the length of which would 
be about 12 to 15 inches, but these were rather exceptional occurrences. 
Other fishes observed included one or two Brassies, a few Norway pouts, and 
the remains of what appeared to be a lemon sole, but the fish was too much 
digested to be satisfactorily identified ; sand-eels were also frequently met 
with in the stomachs of the smaller halibuts. In the stomach of one of these 
I found a Pogge (Agonus cataphractus), 44 inches long and nearly perfect, 
its hard scaly covering being nearly impervious to the solvent action of the 
the gastric fluid, 
