Land, Fresh- Water, and Marine Crustaeea. 187 



Genus (26) Chydorus, Leach, 1816. 

 4 J:. Chydorus globosus, Baird. 



1850. Chydorus globosus, Baird, Brit. Entoiuostraca, p. 127, pi. xvi. 

 fig. 7. 



Habitat. — Loch Achray. Dr and Miss Sprague collected 

 this fine species in an old quarry in Dalmeny grounds, close 

 to the river Almond, on 6th September 1901. 



45. Chydorus ovalis, Kurz. 



1874. Chijdorus ovalis, Kurz, Dodekas iieiier Cladoc, p. 73, pi. iii. 

 fig. 11. 



Habitat. — A few specimens of a Chydorus, which agree 

 with the description of C. ovalis given by Professor Lilljeborg 

 in his important work on the Swedish Cladocera, were 

 obtained in Linlithgow Loch in October 1896 and in Loch 

 Leven in June 1898. 



46. Chydorus lattcs, G. 0. Sars. 



1862. Chydorus latus, G. 0, Sars, Vid. Selsk. i Christiania Forh., 

 1861 (Aftr.), p. 41. 



Habitat. — Loch Achray, frequent in March 1898, but this 

 was the only time it was observed during my four visits to 

 this loch. 



47. Chydorus barbatiis (G. S. Brady). 



1868. Lynceus barbatus, Brady, Intellectual Observer, 1868. 



Habitat. — This Chydorus appears to be moderately frequent 

 in some of the lochs and ponds within the district under 

 consideration, as Loch Leven, Loch Lubnaig, Loch Katrine, 

 Loch Achray, etc. As remarked by Mr Scourfield, "the 

 ventral shell margin is in this species densely fringed with 

 long plumose setae, hence the name C. barbatus.'' 



48. Chydorus sphmricus (0. F. Mliller). 



1785. Lynceus sphcericus, 0. F. Miiller, Entomostraca, p. 71, 

 No. 2932. 



Habitat. — Common and generally distributed. G. ccelatus, 

 Schoedler, is, according to Professor Lilljeborg, a variety of 

 C. sphcericus. 



