182 Proceedings of the Royal Physical Society. 



Genus (14) Acantholeberis, Lilljeborg, 1853. 



22. Acantholeberis curvirostris (0. F. Miiller). 



1776. Dajjhne curvirostris, 0. F. Miiller, Zool. Dan. Prod., p. 200, 

 No. 2403. 



Habitat. — Marfield Loch, Midlothian, 21st September 

 1901; rare (Dr and Miss Sprague). 



Family C h Y D o R i d ^, T. RE. Stebbing, 1902. 

 Genus (15) Eurycercus, Baird, 1843. 



23. Eurycercus Ictmellatus (0. F. Miiller). 



1785. Lyiiceus lamellatus, 0. F. Miiller, Entomostraca, p. 73, pi. ix. 

 figs. 4-6. 



Habitat. — Common and generally distributed throughout 

 the district. 



Genus (16) Camptocercus, Baird, 1843. 



24. Camptocercus rectirostris, Schoedler. 



1862. Camptocercus rectirostris, Schoedler, idem, Die Lynceiden u. 

 Polypheniiden der Unigegend v. Berlin, Ichresb. ii. d. 

 Dorothimstad Kealschule, p. 25, pi. ii, tig. 43. 



Habitat. — Loch Achray, November 1897 ; rare. The form 

 described in Baird's classical work on British Entomostraca 

 is probably this species. Typical specimens of C. macrurus 

 (O. F. Miiller) have been observed in none of the Scottish 

 lakes or ponds examined by me. 



Genus (17) Acroperus, Baird, 1843. 



25. Acroperus harpae, Baird. 



1835, Lynceus harpae, Baird, Trans, Berw, Nat. Club, vol. i. 



p. 100, pi. ii. fig. 17. 

 1850. Acroperus harpae, idem, Brit. Entoni., p. 129, pi, xvi. fig. 5. 



Hahitat. — Generally distributed and moderately common 

 throughout the district. 



Genus (18) Alonopsis, G. 0. Sars, 1862. 



26. Alonopsis elongata, G, 0, Sars. 



1862, Alonopsis elongata, G. 0. Sars, Forh. i Vidensk, Selsk. i 

 Christiania, 1861 (Aftr.), p. 53. 



Habitat. — Moderately common in several of the larger 



