of the Fishery Board for Scotland. 
289 
CATALOGUE OF CLADOCERA REFERRED TO IN THE PRE- 
CEDING REPORT, WITH SYNONYMS AND DESCRIPTIVE 
NOTES. 
SiDIDiE. 
Siday Straus. 
Sida crystallina (Miiller). 
1776. Daphne crystallina, Miiller, Zool. Dan. Prod., No. 2405. 
1821. Sida crystallina, Straus, Mem. Mus. Hist., v. 
1850. Sida crystallina, Baird, Brit. En torn., p. 107, pi. xii. figs. 3, 4 ; pi. xiii. 
fig. 1 a-h. 
A large and easily observed species, readily distinguished from the next 
by the external branch of the antenna having three and the other two articu- 
lations. It is somewhat local, but is sometimes found in abundance. 
Daphnellay Baird. 
Daphnella brachyura (Lievin). 
1848. Sida brachyura, Lievin, Branch, d. Danziger Geg. 
1850. Daphnella wingii, Baird, Brit. Entom., p. 109, pi. xiv. figs. 1-4. 
1884. Daphnella brachyura, Herrick, Crust, of Minnesota, p. 21. 
This is much smaller than the last, and at times equally numerous ; 
both branches of antennae have only two joints. The shorter branch 
has the appearance of a third very short joint at the proximal end, but 
the articulation is not complete. 
HOLOPEDID^. 
Holopedium, Zaddach. 
Holopedium gibberum, Zaddach. 
1855. Holopedium gibberum, Zaddach, Wiegmann. Archiv. fur Naturges., Bd. 
21, p. 159, pi. viii. fig. 9. 
1865. Holopedium gibberum, G. O. Sars, Norg. Ferskvand. Clad. Cten., p. 57, 
pi. iv. 
1883. Holopedium gibberum, C. Beck, Jour. R. Mic. Soc, p. 778, pi. xi. 
1884. Holopedium gibberum, Herrick, loc. cit., p. 22, pi. N, fig. 11. 
This is a remarkable species, and differs from all other known Cladocera. 
It " has the brood cavity greatly elevated, and the whole upper part of the 
animal is covered by a jelly-like mass secreted as a protection or float." It 
was added to the British fauna by C. Beck in 1881, who found it in 
Grasmere, Cumberland, and afterwards in a few other places. Sars gives 
a fine figure of the species in the work quoted above. 
Daphnid^. 
Ceriodaphnia, Dana. 
Geriodaphnia reticulata (Jurine). 
1820. Monoculus reticulatus, Jurine, Hist. Nat. Monoc, p. 139, pi. xiv. figs. 3, 4. 
1850. Daphnia reticulata, Baird, Hist. Entom., p. 97, pi. vii. fig. 5 ; pi. xii. 
fig. 1 ( (5 ) and fig. 2 (var. quadrangula\ 
1884. Ceriodaphivia reticluata, Herrick, loc. cit. ^. 38, pi. A, fig. 21. 
t 
