33 NEW AND RARE SPECIES OF COPEPODA FROM SCOTLAND 
and broader, and by the difference in the structure of the 
first and fifth thoracic feet. The ovisac of this#@spectes 
appears to contain fewer but larger ova than that of Lepzo- 
psyllus robertsont. 
RECORDS INDICATING AN EXTENSION OF DISTRIBUTION. 
CYCLOPS AQUOREUS, Fischer, “ Abhandl. der Akad. der 
Wissenschaft,” Bd. viii. p. 654, Taf. XX., Figs. 26-29 (1860). 
—This, which is one of those curious species that form a 
link between the truly freshwater and the truly marine 
Copepoda, was obtained in brackish pools near the head of 
West Loch Tarbert, Argyleshire, on both the north and 
south sides of the loch. Though widely distributed, the 
Scottish localities where Cyclops e@quoreus has been recorded 
from are, so far as known to us, fewin number. It has been 
“taken by the Rev. A. M. Norman in the West of Scotland” ;' 
in pools above high-water mark at Cramond Island, Firth of 
Forth ; in the mussel beds at the mouth of the river Eden, 
Fifeshire ; and Loch Stennis, Orkney. 
TACHIDIUS LITTORALIS, Poppe. |TACHIDIUS CRASSI- 
CORNIS, Z. Scott, “Tenth Annual Report of the Fishery 
Board for Scotland,” part ili. pi 250, Plate VIIL Biestee 
(1892).] 
Tachidius littoralis was recorded from the Firth of Forth, 
the first time for Scotland, in 1892. Though as yet known 
from only a few localities in the British Islands, we believe 
that it will yet be found distributed all round our shores 
wherever there is a suitable habitat, ze. brackish water with a 
muddy and weedy bottom. It was obtained in pools of this 
description during the month of July last year around the 
head and north side of West Loch Tarbert. 
DELAVALIA PALUSTRIS, Brady, “ Nat. Hist. Trans. North- 
umb, and. Durham,” iii. p. 134, Pl. V. Figs. 10-15)(@eee) 
This species was taken in pools between tide-marks near 
the head of West Loch Tarbert. Its distribution in Scotland 
appears as yet to be very limited. The Firth of Forth is 
1 «A Monograph of the Free and Semiparasitic Copepoda of the British 
Islands,” ii. p. 1203 no locality is given. 
