323 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 minutus, 0. F. Miiller, Entomostraca, p. 101, pi. xvii. 



figs. 1-7. 

 1820. Monoculus stapliylinus, Jurine, 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. 

 Hah. — 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, pi. ii. figs. 57-59, 59a. 



1880. Canthocamptus northumbricus, 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. O. Sars. 



1863. Canthocamphis gracilis, G. O. Sars, Vidensk. i Christiania 



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

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



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

 1902. ,, gracilis, Lillj., Synopsis Sf>ec. hucusque in 



aquis dulc. Suec. observ. Fam. Harpactic, 



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

 Hah. — Linlithgow Loch, Upper Elf Loch (near Edinburgh), 



