of the Fishery Board for Scotland, 



251 



NOTES AND DESCRIPTIONS OF SOME OF THE SPECIES 

 CONTAINED IN THE TABLES t AND II. 



CRUSTACEA. 



COPEPODA. 



CALANIDiE. 



Eurytemora Clausii (Hock). 



This Calanid, though frequent in some tidal lagoons and estuaries, is, 

 so far, of rare occurrence in Britain as an inhabitant of purely fresh water. 

 Its occurrence in Possil Marsh, near Glasgow, is therefore of interest, 

 especially as it has been obtained in only one other fresh water locality 

 in Scotland. The fifth feet of the female, of which I have given a 

 drawing from one of the Possil Marsh specimens (PI. IX. fig. 1), are quite 

 characteristic of the species. The only apparent difference in the female 

 fifth pair from Possil Marsh is that the terminal seta of each branch is 

 plain, or so indistinctly plumose that the feathering was not distinguish- 

 able by my ^-inch objective. 



CYCLOPIDiE. 



Cyclops Thomasi) Forbes, Cyclops affinis, G. O. Sars, and Cyclops phaler- 

 atus, Koch. 



All these three species of Cyclops are comparatively rare. The first 

 was obtained in two of the lochs near Glasgow — viz., Possil Marsh 

 and St German's Loch. The second was found in three of the 

 Barra lochs, — a few specimens from one loch bore ovisacs ; it also 

 occurred in one of the Perthshire lochs (a few specimens with ovisacs), 

 and in Possil Marsh. The third species, Cyclops phaleratus, was obtained 

 in only one of the lochs that form the subject of this paper — viz., Bardowie 

 Loch, near Glasgow. 



Cyclops macrurus, G. 0. Sars. 



This rare Cyclops was moderately frequent in the gatherings from Loch 

 Lubnaig. The structure of the antennules is somewhat like that of the 

 same appendages in Cyclops serrulatus, but they are considerably shorter. 

 The long and slender abdominal stylets not only want the longitudinal 

 row of minute teeth, but possess a peculiar fascicle of small setae near the 

 distal end. Discrimination of the speciss is easy when once the eye 

 becomes familiar with it. The British localities for this species are very 

 few, and Loch Achray — one of the lochs of the Trossachs, and within a 

 comparatively few miles of Loch Lubnaig, but having no connection with it 

 — is one of them. 



HARPAOTICIDiE. 



Canthocamptus hirticornis, n. sp. (PI. IX. figs. 13-26). 



Description of the species. — Female, length *58 mm. (^ of an inch). 

 Body moderately robust. Antennules stout, seven-jointed ; joints sub- 

 equal in length except the first, which is considerably longer, and the 



