LUMPEKUS LAMPETEirOEMTS ON THE COAST OE SCOTLAND. 47 



The next 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 w^ell filled. 

 Microscopical examination of the contents of their stomachs 

 reveals the fact that the food of Lumjpenus 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 Bia- 

 stylus and Edora, minute bivalve mollusks, annelids, and several 

 very small fish-scales, minute starfish of the genus Amphiura, 

 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 

 brov/n 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 tishoides of Brady. Along with it is another 

 form of the same genus, and very like D. tishoides in every way 

 except that the last abdominal segment terminates in a long sharp 

 cylindrical tel^on, 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 

 minna; 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. 



