NOTES ON FRESH AND BRACKISH-WATER ENTOMOSTRACA 27 
Canthocamptus zschokket.1—This so closely resembles C. pyg- 
meus, that it may easily be mistaken for that species. There are 
two characters, however, by which the females of both may usually 
be distinguished ; in the former the long sete of the first four pairs 
of thoracic feet are straight ; in the latter the long sete of the fourth 
pair are distinctly curved at the ends ; in the first the anal operculum 
projects upwards at an acute angle; in the latter the operculum is 
depressed. These peculiarities are best seen when the specimens 
are viewed laterally. C. zschokked was described and figured in 
part ui. of the “Eleventh Annual Report of the Fishery Board for 
Scotland,” 1893, under the name of AZtheyella propingua. 
Moraria poppet.—This is one of the rarer fresh-water Harpactids 
of Scotland. Hitherto I have observed it in only two localities, 
namely, in pools by the side of Loch Fad in Bute, and near the 
shore at Hunterston, Ayrshire; this is therefore the first time it 
has been recorded for the east of Scotland. It is a very small 
species and requires careful examination. A third species of 
Moraria—M. brevipes, G. O. Sars—has been recorded from several 
places in Scotland, and among others in Rescobie Loch, Forfar- 
shire. 
Laophonte curticauda.—This Laophonte is not so frequently met 
with in brackish water as one or two others of the same genus, such 
as Laophonte mohammed, Richard, which was discovered in brackish- 
water pools near Langbank, Renfrewshire, in 1897,2 but which had 
previously been observed by Mr. Scourfield in a marsh at Barmouth 
Junction, North Wales, in November 1895. Laophonte littorale, 
T. and A. Scott, another brackish-water species, has been found 
near Aberlady, Firth of Forth, and at the mouth of the river 
Alness, Cromarty Firth.® 
Lannopus palustris and Platychelipus littoralis are two curious 
brackish and estuarine species described by Dr. G. S. Brady in his 
‘Monograph of British Copepoda.” Formerly they were considered 
to be moderately rare, but the extended research of recent years 
has shown their distribution to be fairly extensive. 
Dactylopus tisboides.—As pointed out by Dr. Brady, there appear 
to be two forms (or races) of this species—a brackish-water and a 
marine ; that found in the Ythan belongs to the first, and is not 
1 The two species mentioned here (C. szschokked and C. pygme@a) should 
perhaps be more correctly referred to the genus A/theyella of Dr. G. S. Brady, 
as they differ from the typical Caz¢thocamptus in the structure of the first pair of 
thoracic feet. 
2 Part iii. of the ‘‘ Fifteenth Annual Report of the Fishery Board for 
Scotland,” p. 317. 
* “Ann, and Mag. Nat. Hist.” (6), vol. xii. p. 238, pl. xi. figsi> 7-14 
(October 1893). 
