300 Proceedings of the Royal Physical Society. 



9. Pseudocyclopia caudata, T. Scott. 



1894. Pseudocyclopia caudata, T. Scott, Twelfth F. B. Rept., pt. iii. 

 p. 236, pi. v. figs. 1-8. 



Hab. — Off St Monans in 1893; off the east side of Inch- 

 keith, in about 5 fathoms, in May 1901. 



10. Pseudocyclopia Giesbrechti, Wolfenden. 



1902. Pseudocyclopia Giesbrechti, Wolfenden, Jour. M. B. A. Ply- 

 mouth, January 1902, p. 370, pi. iv. 



Hab. — West of Queensferry; rare. A single male was 

 dredged to the west of Queensferry, 17th November 1893, but 

 was only recently identified. A female (the one he describes 

 and figures) was taken by Dr Wolfenden with a surface tow- 

 net off the island of Bressay, Shetland, in March 1900. 



Family Centropagida 

 Genus (7) Centropages, Kroyer, 1848. 



11. Centropages typicus, Kroyer. 



1848. Centropages typicus, Kroyer, Naturh. Tidsskr. (N.S.), vol. ii. 

 p. 588, pi. vi. figs. 22-26. 



Hab. — Not uncommon in the seaward portion of the 

 estuary, especially during summer ; but it appears to become 

 rarer in the winter months. 



12. Centropages hamatus (Lilljeborg). 



1853. Ichtyophorba hamata, Lillj., De Crust, ex ord. tribus in Scania 

 occurrentibus, p. 185, pi. xxi. ; pi. xxvi. figs. 9-12. 



Hab. — This species, which is rather more common than the 

 last, has a seasonal distribution somewhat similar to it. 



Family Diaptomida 

 Genus (8) Diaptomus, Westwood, 1836. 



13. Diaptomus castor (Jurine). 



1820. Monoculus castor, Jurine, Hist, des Monocles, p. 50, pi. iv. 

 figs. 1-6 et seq. 



Hab. — In an old quarry on the Braid Hills, Edinburgh, in 

 April 1888 : this quarry is now included within the public 



