Land, Fresh- Water, and Marine Crustacea. 121 



specimens were obtained mixed up with T. neglecta. 

 T. longicaudata is very similar in general appearance to 

 the more common T. neglecta, and therefore it may have 

 occasionally been overlooked. 



Genus (4) Nematoscelis, G. 0. Sars, 1883. 



6. Nematoscelis megalops, G. 0. Sars. 



1872. Thysanoessa borealis, Norman, M. S., in Sim, Stalk-eyed 

 Crust N.E. Coast of Scotland; Scottish Naturalist, vol. i. 

 p. 188. 



1883. Nematoscelis megalops, G. 0. Sars, Chr. Vid.-Selsk. Forhandl., 

 p. 27. 



Habitat. — Firth of Forth, 1892 [see Norman in Ann. and 



Mag. Nat. Hist. (June 1892), p. 464]. Off St Monans, one 



specimen, 28th May 1904. 



Family Mysid^. 

 Genus (5) Siriella, Dana, 1850. 



7. Siriella norvegica, G. 0. Sars. 



1869. Siriella norvegica, G. 0. Sars, Undersogelser over Christiania- 

 fjorden, Dybvandsfauna, p. 40. 



Habitat. — Firth of Forth, near May Island, 1889, rare. 



8. Siriella jalUnsis (Czerniavsky). 



1868. Siriella jaltensis, Czern., Materialia ad Zoographiam Ponticam 

 comparatam, p. 66, pi. iv. tigs. 12 and 13. 



Habitat. — Taken at Joppa, September 1887, and sub- 

 sequently at various other places, but always sparingly. 

 The latest record I have is for Station V., where one or two 

 specimens were captured on 24th April 1901. 



9. Siriella armata (M. -Ed wards). 



1837. Cynthia armata, M. -Edwards, Hist. Nat. des Crust., vol. ii. 

 p. 436. 



Habitat. — Taken off St Monans in February 1889, and at 

 Station III. in March 1892. It also occurred sparingly in 

 the same gathering with S. jaltensis from Station V. collected 

 in April 1901. This Siriella has been observed in the Forth 

 estuary more frequently than any of the other members of 

 the genus. 



