348 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 
numerously represented, and there is also a considerable 
number of the Ostracoda; but the Cladocera are represented by 
only two species. This latter group, though frequently indi- 
vidually numerous in the sea, and sometimes also in brackish 
water, does not usually in such situations exhibit much variety of 
form; but when fresh-water pools or lochs are examined, very 
different results are obtained—the Cladocera are generally found 
to be not only numerous individually, but are also represented 
by a considerable number of species. 
The names of all the Entomostraca, as well as of the Amphi- 
poda and Isopoda, obtained during our visit to Fairlie and 
Hunterston, so far as they have been identified, will be found in 
the annexed list. A glance at the list will show that the 
Copepoda are represented by thirty-eight named species, several 
of which have not previously been recorded for the Clyde; and 
there are at least other two that appear to be undescribed. The 
Ostracoda are represented by twenty-two species, none of which 
is new to the Clyde, but a few of them are moderately rare. 
The Cladocera comprise two species, as already stated. The 
Amphipoda are also few in number, only three species being 
observed. The Isopoda observed number eight species. This 
makes a total of seventy-three species of Crustacea, exclusive of 
the two or three that appear to be new, and will be described 
later. A larger number of Amphipoda and Isopoda might have 
been obtained had a special effort been made to collect these 
forms, but, as the chief object of my visit was to investigate the 
Entomostracan fauna of the place, comparatively little attention - 
was given to the other groups. 
List of the Crustacea obtained during a visit to Fairlie and 
Hunterston, so far as they have been identified. A large propor- 
tion of the Copepods and Ostracods obtained is from the brackish 
water pools that have been referred to; the others were collected 
between tide-marks. 
CopEPODA. 
Eurytemora velox (Lillj.). Cyclopina gracilis, Claus. 
Cyclops bisetosus, Rehberg. Ectinosoma melaniceps, Boeck. 
serrulatus, Fischer. curticorne, Boeck. 
jimbriatus, Fischer. herdmani, T. and A. Scott. 
equoreus, Fischer, Lradya minor, T, and A, Scott, 
