neio to or rare in the British Seas. 95 



following habitats: — Baltic Sea {Prof. Loven), Bergen, Nor- 

 way (Prof. Lilljehorg). Kors Fiordj 1878, and Lervig, Har- 

 danger Fiord, Norway, 1879 ; Shetland, 1867, in rock-pools ; 

 Guernsey, 1865; Oban, 1877 ; Cullercoats, Northumberland 

 [A. M. N.). Tarbert, Loch Fyne, 1885 {Scotch Fishery 

 Laboratory). It has been sent to me for examination from 

 the Moray Firth by Mr. T. Edward. 



Mysis arenosa, G. O. Sars. 



Mi/sis arenosa, G. O. Sars, Nye Bidrag til kundskaben om Middelhavets 

 Invertebratfauna, I. Middelhavets Mysider, 1870, p. 16, pis. v. & vi. 



This small species, described from the Mediterranean, was 

 added to the British fauna by Mr. C. Parker, who found 

 specimens, in 1884, at Starcross, Devon, which he forwarded 

 to me ; and specimens have now been taken at Tarbert, Loch 

 Fyne, by the Scotch Fishery Laboratory. 



Mysis Lamornce^ Couch. 



Mysis Lamornce, R. Q. Couch, The Zoologist, 1856, p. 5286; Norman, 

 Ann. & Mag. Nat. Hist. ser. 3, vol. vi. 1860, pi. viii. tigs. 4-6 ; Goes, 

 Crustacea Decapoda Podophthalmia Svecife, p. 15. 



Mysis aurantia, G. O. Sars, Eeretuing om en i Sommeren 1863 fore- 

 tagen Reise, p. 20. 



Mysis Lamornce, G. 0. Sars, Mouographi over de ved Norges Kyster 

 forekomraende Mysider, 1879, p. 65, pi. xxx. 



This species is known to me from the following localities, 

 Avhence specimens are in mycoUection : — Falmouth {A. M. N.) , 

 Banff {Mr. T. Edward)., Seaham, County Durham {Mr. G. 

 Hodge), Loch Goil {Mr. D. Robertson), Tarbert, Loch Fyne 

 {Scotch Fishery Laboratory). 



Genus Siriella, Dana. 



{=. Cynthia, Thompson.) 



The more tangible generic characters are as follows : — 

 Antennal scale subrhomboidal, the external margin naked 

 until it terminates in a spine, whence it slopes to meet an 

 inner margin, and is similarly setose ; the scale has a small 

 terminal joint, generally furnished with five setas. Pergeo- 

 pods seven-jointed, the terminal joint or finger biarticu- 

 late and nail-formed, at the end of preceding joint a dense 

 bunch of setge, which are microscopically spined. Telson 

 elongated, linguiform, entire at the apex, furnished with mar- 

 ginal and terminal spines, so arranged that smaller spines 

 alternate with larger. Outer uropods two-joiuted, first joint 

 without setae on external margin, but furnished with a series 

 of spines, the three distal spines exceeding the others in size. 



