124 Proceedings of the Royal Physical Society. 



Joppa in September 1887; off the east side of Inchkeith in 

 March 1892, and also in other parts of the estuary, but 

 always very sparingly. 



Genus (11) Hemimysis, G. 0. Sars, 1869. 



20. Hemimysis Lamornw (Couch). 



1856. Mysis Lamornw, Couch, The Zoologist, p. 5286. 

 Habitat. — Collected off Bo'ness in November 1887; Largo 

 Bay, December 1888 ; and afterwards at nearly all the 

 Experimental Stations. This species, when living, is readily 

 observed by its brilliant red colour. 



Genus (12) Macropsis, G. 0. Sars, 1876. 



21. Macropsis Slabberi (Van Beneden). 



I860. Podopsis Slabberi, Van Ben., Rech. sur la famie litt. de 



Belgique, Crust., p. 18, pi. vi. 

 1876. Macropsis Slabberi, G. 0. Sars, Middelhavets- Mysider, p. 28, 



pis. xi.-xiii. 



Habitat. — Firth of Forth below Grangemouth, 1884, and 

 subsequently near Granton Quarry, Inchmickery, and Inch- 

 keith (Henderson). Common off Bo'ness and off Musselburgh, 

 but becoming gradually scarcer seaward, and rarely taken at 

 the mouth of the estuary. 



Genus (13) Macromysis, White, 1847. 1 



22. Macromysis flexuosus (0. F. Mliller). 



1788. Cancer flexuosus, Mull., Zoologia Danica, — Discript. et Hist., 



vol. ii. p. 34, pi. lxiv. figs. 1-9. 

 1853. Macromysis chammleon, Bell, Brit. Stalk-eyed Crust., p. 336. 



Habitat. — Common, especially inshore, off Musselburgh 

 and in the upper parts of the estuary. (See Norman, op. cit., 

 for a list of synonyms.) 



23. Macromysis inermis (Eathke). 



1843. Mysis inermis, Rathke, Beitr. zur Fauna Norw., p. 20. 



Habited. — Off Bo'ness in November 1887, and in February 



1 Cf. Stebbing on the name of the genus in A History of Crustacea, p. 267 

 (1893). 



