of the Fishery Board for Scotland. 109 
[Reprint from Twenty-first Annual Report of the Fishery Board for 
Scotland—Part III.—Published July 20, 1903.| 
Il.—ON SOME NEW AND RARE CRUSTACEA COLLECTED AT 
VARIOUS TIMES IN CONNECTION WITH THE INVESTI- 
GATIONS OF THE FISHERY BOARD FOR SCOTLAND. 
By Tuomas Scott, LL.D., F.L.S., Mem. Zool. Soc. de France. 
(Plates I1-VI.) 
Though the larger, or, as they are sometimes called, the higher 
Crustacea of the British seas are now fairly well known, our knowledge 
of the smaller forms is still very defective ; and as these smaller species 
constitute an important part of the food of small and young fishes, their 
study becomes important from a fisheries’ point of view as well as from 
the point of view of the naturalist. 
A large number of gatherings of small crustaceans has been examined 
during the past year. These gatherings have been collected at various 
times, and some of them several years ago; some of the earlier gather- 
ings were not examined or only partially examined at the time they 
were collected, as other work requiring more immediate attention had to 
be done. The re-examination of these collections has yielded several new 
forms, besides a number of rare and interesting species already described. 
The new species all belong to the Copepoda—a group which from their 
great abundance, their wide distribution in all our seas and estuaries, and 
their nutritive qualities, is of immense value as food for fishes. 
In a recent paper on the food of fishes* it is shown that the young of 
almost all the food-fishes live very largely on small crustaceans, and a 
considerable proportion of them belong to the Copepoda. 
Among the species recorded in the present paper the following appear 
to be undescribed :— 
Ametra pusilla, T. Scott (sp. nov.). 
»  ambigua, T. Scott (sp. nov.). 
Delavalia minutissima, T. Scott, (sp. nov.). 
Tetragoniceps pygmeus, T. Scott (sp. nov.). 
Laophonte gractlis, T. Scott (sp. nov.). 
Cletodes neglecta, T. Scott (sp. nov.). 
Enhydrosoma gracile, T, Scott (sp. nov.). 
Enhydrosoma minutum, T. Scott (sp. nov.). 
Dactylopus littoralis, 'T. Scott (sp. nov.). 
Dactylopus vararensis, T. Scott (sp. nov.). 
Dactylopus mixtus, T. Scott (sp. nov.). 
Paranthessius dubius, T. Scott (gen. et sp. noe) 
While among the other species recorded in the sequel there are severa. 
that are of special interest. For example, Parastephos pallidus (G. O. 
Sars) is a copepod new to the British fauna. 
Eucalanus crassus, Giesbrecht, is a copepod which was added to the 
British fauna a few years ago, and is now recorded from a new station. 
Stephos scotti, G. O. Sars, is also recorded from a new station, and the 
male is described for the first time from Scottish specimens. 
* Twentieth Annual Report Fishery Board for Scotland, Part III., pp. 486-538 (1902). 
