64 Proceedings of the Royal Physical Society. 
Genus Cyprois, Zenker (1854). 
Cyprois flava (Zaddach). 
1838. (2) Cypris gibbosa, Baird, Mag. Zool. and Bot., vol. ii., p. 187, 
pl. v., fig. 15. 
1844. Cypris flava, Zaddach, Syn. Crust. Prus, Prodr., p. 33. 
1850. Cypris gibbosa, Baird, Brit. Entom., p. 156, pl. xix., fig. 8. 
1854. Cyprois dispar, Zenker, Mon. der Ostrac. (Archiv fiir Natur- 
gesch.), p. 18. 
1889. Cyprois flava, Brady and Norman, op. cit., p. 97, pl. viii, 
figs. 18, 19; pl. xii., figs. 13-21, 38, 
Habitat.—Duddingston Loch, upper end, common (1889). 
Mr David Robertson has obtained this species in Burnside 
Loch, near Rutherglen. It is thought that the Cypris gibbosa 
of Dr Baird is, probably, this species, and, if so, his name 
ought to have precedence of the other. Dr Baird’s figure of 
Cypris gibbosa is, certainly, very different from the specimens 
of Cyprois flava obtained in Duddingston Loch. He also 
describes the shell as “much elevated on the upper margin, 
the centre exhibiting a large gibbosity or hump,” and also 
as being “of a light green colour”—characters which do 
not very closely agree with the Duddingston specimens. 
Genus Candona, Baird (1845). 
Candona candida (O. F. Miiller, 1785). 
1889, Candona candida, Brady and Norman, op. cit., p. 98, pl. x., 
figs. 1, 2, 14-23. 
Habitat.—Generally distributed, and common throughout 
the district. 
Candona lactea, Baird. 
1868. Candona lactea, Brady, Mon. rec. Brit. Ostrac.; p. 382, pl. xxiv. ; 
figs. 55-58. = 
1868. Candona detecta, idem, ibidem (var. ), p. 384, pl. xxiv., figs. 35-38 ; 
pl. xxxvii., fig. 2. 
1889. Candona lactea, Brady and Norman, op. cit., p. 100. 
Habitat.— Generally distributed, but not so common as 
the last. The young of Candona candida, which is a very 
variable species, are sometimes apt to be mistaken for 
