ANNALS OF SCOTTISH NATURAL HISTORY 218 
The Bosminip&. This family contains only one genus—JSos- 
mina; specimens of the common BS. longirostris (O. F. Miiller) have 
been collected in ponds in the Duthie Park and in Loch Callater. 
The LyNCODAPHNIDZ# are represented in the gatherings recently 
collected by, at least, three species, viz. Drepanothrix dentata (Euren), 
Acantholeberis curvirostris (O. F. Miller), and JLlyocryptus sordidus 
(Lievin). Drepanothrix was obtained in Bishop Loch and in Loch 
of Park: it is readily distinguished from its near allies by the hook- 
like process on the dorsal margin of the shell. The distribution of 
this species appears to be co-extensive with the British Islands. 
_ Acantholeberis was obtained for the first time in Aberdeenshire in 
a gathering of Entomostraca from Loch Callater, which Mrs. T. 
Wemyss Fulton kindly presented to me. Loch Callater, which is 
situated a few miles to the south of Braemar and near the road 
leading over the hills to Glen Dole and Glen Clova, has an 
elevation of considerably over a thousand feet above sea - level, 
and this adds very much to the interest of the gathering. The 
Acantholeberis was one of the most common of the species observed 
in the Loch Callater gathering, and many of the specimens were 
of large size and carried pseudova ; the species has, more recently, 
been observed also in Bishop Loch near Parkhill. J/yocryptus,— 
the third Lyncodaphnid referred to,—though not previously recorded 
from Aberdeenshire, probably occurs in most of the lochs of 
Scotland ; its shell is usually more or less coated with mud, which 
prevents it from being readily noticed ; it has been observed in Loch 
of Skene, in Corby Loch, and Bishop Loch. : 
_ The Lyncerp# obtained in the Aberdeenshire lochs recently 
examined comprise several comparatively rare forms, and a few of 
these will now be referred to. Alona tenuicaudis, G. O. Sars, which 
is considered to be a rare species in Scotland, was obtained in a 
gathering from Loch of Park; in this species the post-abdomen is 
narrow and moderately elongate, the upper and lower margins are 
nearly parallel, and the marginal setee are comparatively small except 
at the posterior angle at the base of the claw, where there are a few 
moderately long sete. Alona rustica, T. Scott, was obtained in 
Bishop Loch. Alona intermedia, G. O. Sars, was also observed in 
this loch as well as in Corby Loch (this species is described in some 
of my previous papers as Alona neglecta, T. Scott).1 The very 
small, but pretty, AZonella nana (Baird) and Alonella exigua (Lillje- 
borg) 2 were both obtained in Corby Loch and Bishop Loch, while 
the second was observed also in Loch of Skene. Pleuroxus 
uncinatus, Baird, Pleuroxus levis, G. O. Sars, and Pleuroxus 
trigonellus (Miller) were obtained in a gathering from Loch of 
1 See remarks on this species in the ‘‘ Seventeenth Annual Report of the 
Fishery Board for Scotland,” part ili. p. 200 (1899). 
2 See also remarks on this species, of. czt. p. 201. 
