328 Proceedings of the Royal Physical Society. 



Genus (57) Pontopolites, T. Scott, 1894. 



127. Pontopolites typicus, T. Scott. 



1894. Pontopolites typicus, T. Scott, Twelfth F. B. Rept. , pt. iii. 

 p. 251, pi, viii. figs. 9-17. 



Hah. — This species was described from specimens dredged 



off Musselburgh in 1893, and was at that time regarded as 



rare; subsequently, however, it was found to be moderately 



frequent in gatherings collected in shallow inshore waters. 



Like Tachidius discipes, this species has the fifth pair of 



thoracic feet composed each of a single lamelliform joint, 



but it differs very markedly in the structure of the other 



thoracic legs, so much so that it is with some hesitation I 



have placed it under this family. 



Genus (58) Canthocamptus, Westwood, 1836. 



128. Canthocamptus minutus (Miiller). 



1785. Cyclops ininutus, 0. F. Miiller, Entomostraca, p. 101, pi. xvii. 



figs. 1-7. 

 1820. Monoculus stapliylinus, Jiirine, Hist, des Monocles, p. 74, 



pi. vii. figs. 1-19. 

 1880. Canthocamptus minutus, G. S. Brady, Monograph, vol. ii. 

 p. 48, pi. xliv. figs. 1-17. 

 Hal). — Moderately common, and generally distributed in 

 lochs, ponds, etc., throughout the district. 



129. Canthocamptus horridus, S. Fischer. 



I860. Canthocamptus horridus, Fischer, Akad. d. Wissensch., 8ten 

 Bd. 3te Abth., p. 760, ])1. ii. figs. 57-59, 59a. 



1880. Canthocamptus northumhricus, Brady, I. c, vol. ii. p. 57, pi. 

 xlv. figs. 1-14. 



Hah. — Duddingston Loch, 1892 ; Lochgelly Loch, Fife- 

 shire, 19th August 1896. " Vicinity of Edinburgh" (Dr and 

 Miss Sprague). This species does not appear to be very 

 common in Scotland. 



130. Canthocamptus gracilis, G. 0. Sars. 



1863. Canthocamptus gracilis, G. 0. Sars, Vidensk. i Christiania 



Forhandl., 1862 (Aftr.), p. 22. 

 1897. ,, inornatus, T. Scott, Fifteenth F. B. Eept., 



pt. iii. p. 323, pi. ix. figs. 1-12. 

 1902. ,, gracilis, Lillj., Synopsis Spec, luicusque in 



aquis dulc. Snec. observ. Fam. Harpactic, 



p. 26, pi. ii. figs. 8-13. 

 Hah. — Linlithgow Loch, Uppei- Elf Loch (near Edinburgh), 



