186 Mr. T. Scott on 



new species have been added to tlie fauna of our inland 

 waters *. Several of these additional forms belong to the 

 Harpacticidre, which is one of the largest o£ the families of 

 the Copepoda. 



The Harpactids which form the subject of the following 

 observations are all included in the subfamily Canthocamp- 

 tina?, G. S. Brady, and are distributed amongst the 

 succeeding tive genera, viz.: — Canthocamptus , Westwood ; 

 Nifoci-a, Boeck ; Attheyella, G. S. Brady; Moraria, T. & A. 

 Scott ; and Maraenobiotus, Al. Mrazek. 



A few remarks are made on the distinctive characters of 

 each genus, but the species are not described ; descriptions 

 and figures of these will be found in the works which are 

 referred to in connexion with each of the species recorded. 



Subfamily Cantrocamptin^, G. S. Brady. 



Genus Canthocamptus, Westwood, 183G. 



The nine species grouped together under Ganthocamptus- 

 have eight- or nine-jointed antennules. The inner branches 

 of the first pair of thoracic feet are non-prehensile, and they 

 are usually three-jointed and longer than the outer branches. 

 The inner branches of the next three pairs are shorter than 

 the outer ones and composed of two or three joints, the first 

 joint being considerably smaller than the one next to it. 



Canthocamptus staphylinus (Jurine) t- 



1820. Monoculus staphylinus, Jurine, Hist, des Monocles, p. 74, pi. vii.. 



tigs. 1-19. 

 1880. Canthocamptus minutus, Brady, Brit. Copep. vol ii. p. 48, 



pi. xliv. figs. 1-17, 



This is one of the more common and generally distributed 

 species belonging to the freshwater Harpacticidaj of the 

 British Islands ; it is also the largest, and measures rather 

 more than a millimetre in length. 



* Prof. W. LiUjeborg has recently published an important work on 

 the freshwater Harpacticidse of Sweden, ' Kongl. Svenska Vetenskaps- 

 Akademiens Handlingar,' Bd. xxxvi. no. 1. This work should be of 

 interest to British students, for of the seventeen species described by the 

 author twelve at least are also found in the inland waters of the British 

 Islands. 



t See Additional Note at end of this paper. 



