British Freshwater Harpactids. 189 



marshes vvltlun reach of the sea. It was taken by Dr. Gr. S. 

 Brady in a brackish-water pond at St. Mary (Scilly), also in 

 the vicinity of the River Stour at Manningtree, and in Oulton 

 Broad (Suflfolk) ; and the Rev. A. M. Norman obtained it at 

 Isle Oronsay, Skye. I found Canthocamptus palustris in 

 1890 in shore-pools on May Island, Firth of Forth; tlie same 

 species occurred in a gathering of Entomostraca sent to me 

 from Shetland by Mr. Robert Duthie, Fishery Officer, 

 collected in the Loch of Beiton in Unst in 1895 ; this loch 

 is situated somewhat above high-water mark, and at that time 

 the water it contained, if at all brackish, was only slightly so. 

 In 1896 C. palustris was taken with other brackish-water 

 forms in gatherings from shore-pools near Langbank and 

 near Dumbarton, Firth of Clyde, and in 1898 in a gathering 

 from shore-pools at Hunterston, also in the Clyde district. 



Canthocamptus Schmeilii, Mrazek. 



1893. Canthocamptus Schmeilii, Mrazek, " Beitrag zur Kenntaiss der 

 Harpacticidenfauna dea Siisswassers," Zool. Jahrb. sieb. Bi. p. 116, 

 t. vii. figs. 107-117. 



1895, Canthocamptus Schineilii, T. & A. Scott, Ann. Scot. Nat. Hist. 

 (Oct. 189o), p. 284, pi. iv. figs. 1-13. 



Though this species resembles those previously mentioned 

 in having the inner branches of the first pair of thoracic feet 

 longer than the outer branches, it differs in having these 

 branches composed of two subequal joints, instead of being 

 three-jointed. C. Schmeilii appears to be moderately rare in 

 the lochs of Scotland. The only records I possess are as 

 follow :■ — Loch Leven, Kinross, collected in June 1890, but 

 not described till 1895 (in this gathering the species was 

 moderately frequent) ; Park Loch, near Campbeltown, Cantyre, 

 collected in August 1897 ; Loch Lomond, near Balmaha, 

 collected in June 1898. 



Canthocamptus crassus, G. 0. Sars. 



1863. Canthocamptus crassus, G. 0. Sars, " Overs, indenl. Ferskv.- 



Copep.," Videusk. i Christiania Forhandl. for 1862 (Aftr.), p. 23. 

 1880. Attheyella spinosa, Brady, Mon. Brit. Copep, vol. ii. p. 5"^, 



pi. xliii. tigs. 15-18, pi. xlvi. figs. 13-18. 

 1893. Attheyella spinosa, T. Sc©tt, Eleventh Rep. Fishery Board for 



Scotland, pt. iii. p. 225, pi. vi. tigs. 11-20. 

 1893. Canthocamptus crassus, O. Schmeil, Deiitschl. freileb. Siissw.- 



Copep., ii. Teil, Harpact. p. 37, t. iv. fig.^. 1-18. 



In this species, thougli the inner branches of the first 

 thoracic feet are three-jointed, they are comparatively sliort, 

 being only slightly longer than the outer branches. 



A7in. i }fag. N. Hist. Ser. 7. Vol. xi. 11 



