of the Fishery Board for Scotland. 341 
Pisidium nitidum, Jenyns. Moderately common in upper part of 
Section VII. 
»  roseum, Sholtz. Rare, lower part of Section VII. 
Planorbis contortus (Linné). Frequent in upper part of Section 
Ancylus fluviatilis (Miiller), Frequent in Section VI. 
Limnea peregra (Miller). Not very common in both sections. 
»  truncatula (Miiller). Not very common in both sections. 
CRUSTACEA. 
DAPHNIADA. 
Chydorus sphezricus Miiller. Not very common, Section VI. 
CoPEPODA. 
Cyclops serrulatus, Fischer. Frequent in Section VI. 
Canthocamptus minutus (Miiller). Frequent in Section VI. 
OsTRACODA, 
Cypria ophthalmica (Jurine). Frequent in Section VI. and upper 
part of Section VII. 
» serena (Koch). Frequent in upper part of Section VII. 
Cyclocypris globosa (G. O. Sars). Not common in upper part of 
Section VII. 
Erpetocypris reptans (Baird). Not common in upper part of 
Section VII. 
id strigata (Miller). Rare in Section VI. 
Cypridopsis villosa (Jurine). Not common in Section VI. 
»  vidua (Miller), Not common in Section VI. 
Candona candida (Miller). Frequent in both sections. 
» rostrata, Brady and Norman. Rare in Section VI. 
»,  kingslett, Brady and Robertson. Rare in Section VII. 
»,  jabzxformis (Fischer). Rare in Section VI. 
» acuminata (Fischer). Rare in Section VI. 
Ilyocypris gibba (Ramdohr). Not common in lower part of Section 
VII. 
As considerable changes have recently been made in the terminology of 
the fresh-water Ostracoda, I propose now to give a list of the species 
observed throughout the district examined, adding to each a synonymy 
sufficiently full to allow of the older works on this group of Crustacea 
being referred to with greater facility, together with notes on the distribu- 
tion of the rarer species. 
OSTRACODA. 
Cypria exsculpta (S. Fischer). 
1854. Cypris exsculpta, Fischer, Beitrag zur Kenntniss der Ostrac., p. 18, 
pl. xix. figs. 36-38. 
1868. Cypris striolata, Brady, Mon. rec. Brit. Ostrac, p. 372, pl. xxiv. 
figs. 6-10. 
1880. Cypris granulosa, Robertson, Fresh and Brackish water Ostrac. 
of Clydesdale, p. 18, (jun.) 
1889. Cypria exsculpta, Ball and -Norman, Mon. M. and Fw. Ostrac. of 
the N. Atlantic and N. W. Europe, p. 68, pl. xi. figs. 1-4. 
