LUMPENUS LAHPETRIEOKMIS ON THE COAST OE SCOTLAND. 47 
The nest question to which attention had to be directed was, 
upon what does Lumpenus feed ? Although many of the fish 
obtained were so much injured as to be rendered useless as 
specimens, fortunately the stomach of each had escaped muti- 
lation, and therefore the contents were at my disposal ; another 
favourable circumstance was that each stomach was well filled. 
Microscopical examination of the contents of their stomachs 
reveals the fact that the food of Lumpenus is almost a purely 
crustacean one, confined in a very large measure to the Entomo- 
straca and Copepoda; but in addition to these, I have found in 
several numerous immature specimens of the two genera* Dia- 
stylus and Ldora , minute bivalve mollusks, annelids, and several 
very small fish-scales, minute starfish of the genus Ampliiura, 
a crustacean evidently parasitic (this I infer from the fact of its 
being furnished on each foot with a strong long circular claw or 
hook), very small forms of Priapulus caudatus, and a number of 
brown pear-shaped objects quite unknown to me ; also sessile-eyed 
Crustacea (Amphipoda). 
As already stated, the Entomostraca and Copepoda largely 
predominate, the species in greatest number being what seems 
to me Dactylopus tisboides of Brady. Along with it is another 
form of the same genus, and very like L). tisboides in every way 
except that the last abdominal segment terminates in a long sharp 
cylindrical telson, at each side of which, and somewhat under it, 
are two short terminal segments from which issue several setae 
of unequal length. Another creature presenting itself in some 
abundance is in general form somewhat like Idotea parallela of 
Bate and Westwood ; but differs from that species, first, in being 
very small, and in having its body divided into thirteen segments 
instead of nine as in Idotea, and also in having the first pair of 
feet very powerful, terminating in equally strong didactyle hands. 
Its name remains unknown to me. 
Then follow two species of the genus Cythere of Baird ; they 
occur in about equal numbers ; one seems to me to be Cythere 
rninna-, but if Baird’s figure and description are correct, those I 
have cannot belong to that species. C. minna , according to Baird, 
is “ obtusely rounded on the anterior extremity my specimens 
are equally acute at both ends. Can it be a species not described 
by the author just quoted? The second form answers to the 
figure and description of Cythere pellucida of Baird. 
