NOTES ON FRESH AND BRACKISH-WATER ENTOMOSTRACA 27 



Canthocamptus zschokkei. 1 This so closely resembles C. pyg- 

 mceus, 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 setae of the first four pairs 

 of thoracic feet are straight ; in the latter the long setae 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. zschokkei was described and figured in 

 part iii. of the " Eleventh Annual Report of the Fishery Board for 

 Scotland," 1893, under the name of Attheyella propinqua. 



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 

 J\foraria M. brevipes, G. O. Sars has been recorded from several 

 places in Scotland, and among others in Rescobie Loch, Forfar- 

 shire. 



Laophonte curticanda. 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 iSgy, 2 but which had 

 previously been observed by Mr. Scourfield in a marsh at Barmouth 

 Junction, North Wales, in November 1895. Laophonte littora/e, 

 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. 3 



Namiopus 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. zschokkei and C. pygmfea) should 

 perhaps be more correctly referred to the genus Attheyella of Dr. G. S. Brady, 

 as they differ from the typical Canthocamptus in the structure of the first pair of 

 thoracic feet. 



2 Part iii. of the " P'ifteenth Annual Report of the Fishery Board for 

 Scotland," p. 317. 



3 "Ann. and Mag. Nat. Hist." (6), vol. xii. p. 238, pi. xi. figs. 7-14 

 (October 1893). 



