366 Proceedings of the Royal Physical Soviety. 
near Edinburgh; Raith Lake, Kirkcaldy; Loch Leven, 
Kinross; and in the following other Scottish lochs :—Loch 
Strathbeg, Aberdeenshire; Loch Achnacloich, Ross-shire 
(East); Loch Mullach Corrie, in Assynt, Sutherlandshire ; 
and in Loch Harray, Orkney. 
Daphnia longispina, O. F. Miller. 
1785. Daphnia longispina, O. F. Miller, Entomostraca, p. 88, t. xii., 
figs. 8-10. 
1850. Daphnia pulex, var. longispina, Baird, ep. cit., p. 89, pl. vii., 
figs. 3, 4. 
This appears to be less common than Daphnia pulex. The 
only locality within the district where it was obtained was 
Loch Leven, Kinross-shire. It has also been observed in Loch 
Strathbeg, Aberdeenshire; and Loch Ness, Inverness-shire. 
Family BOSMINIDZ. 
Genus Bosmina, Baird. 
Bosmina longirostris (O. F. Miiller). 
1776. Lynceus longirostris, O. F. Miller, Zool. Dan. Prod., No. 2394. 
1867. Bosmina lengirostris, Norman and Brady, Nat. Hist. Trans. of 
Northumb. and Durham, vol. i, p. 357, pl. xxii., fig. 4. 
Loch Leven is the only locality within the district where 
I have observed this Bosmina. But I have records of it from 
several other Scottish localities—Loch Ness, Inverness-shire ; 
Loch Balnagowan, island of Lismore, Argyleshire; Loch 
Ardglass, Loch Scuban, Middle Loch, Mull; Loch Ascog, 
Bute; a small loch near Rutherglen, Lanarkshire; Loch 
Tay, Perthshire. 
Family LyNCODAPHNIDA, Sars (1861). 
Genus Ilyocryptus, G. O. Sars. 
Llyocryptus sordidus (Liévin). 
1858. Acanthocercus sordidus, Liévin. 
1861. Ilyocryptus sordidus, G. O. Sars, Om de i Gmegnen af Christi. 
forekom. Clad., p. 11. 
This species is usually more or less coated with mud, from 
its habitat being among mud at the roots of aquatic plants, 
