13G D. J. SCOURFIELD ON THE ENTOMOSTRACA OF NORTH WALES. 



etc.) the water has been fresh. Nevertheless it is a noticeable 

 fact that it has not yet been found far from the sea. 



My specimens seemed to lack the " down " of fine setse on the 

 first and second joints of the first pair of antenna?, otherwise they 

 agreed very well indeed with the original figures, proofs of which 

 have been kindly sent to me by Mr. Scott. 



Canthocamptus crassus, G. 0. Sars. (Attheyella spinosa, 

 Brady). Mentioned in the Monograph of British Copepoda as 

 being found in the river a little west of Pwllheli. 



Canthocamptus pygmaeus. G. 0. Sars. {Attheyella cryptorum, 

 Brady). In wet mosses and bogs this is almost constantly present, 

 thougli I have not often seen it in great numbers. It has also 

 been recorded from the margins of several of the larger lakes. 



Canthocamptus MacAndrewae. T. and A. Scott. (Attheyella 

 Mac Andrews, T. and A. Scott, " Annals and Magazine of Nat. 

 Hist.," Ser. VI., Vol. xv., June, 1895, p. 457). A few examples 

 of this quite newly described species were found in wet alga from 

 Cwm Glas, Snowdon. 



Mesochia Lilljeborgii, Boeck. Brackish pond, Pensarn 

 (G. S. B.). 



Laophonte IVXohammed, Blanchard and Richard. (Plate VIII., 

 Figs. 3-9). Prof. Brady, who very kindly identified this species 

 for me, says that it does not seem to have been met with since 

 first described by MM. Blanchard and Richard from certain Salt 

 Lakes in Algeria. ("Mem. Soc. Zool. France," Vol. iv., 1891, 

 p. 526, PI. VI., Figs. 1-15). 



At the time of its description it was the only known brackish 

 water species of the genus, but in 1893 a second brackish water 

 species, L. littorale, was described by Messrs. T. and A. Scott 

 from several localities in Scotland. (" On some New and Rare 

 Crustacea from Scotland," " Annals and Magazine of Nat. 

 Hist.," Ser. VI., Vol. xii., p. 238). All the other species are 

 exclusively marine, except that, very rarely, L. similis has been 

 taken in estuarine pools. 



The figures given on the accompanying Plate will, I think, be 

 sufficient to enable anyone to recognise this species without the 

 aid of a long description. The lengths of my specimens were, 



Dactylopus tisboides, Claus. This, although typically a 

 marine species, is sometimes found in brackish water, when it 



