Land, Fresh- Water, and Marine Crustacea. 145 



Genus (11) Hippomedon, Boeck, 1870. 



12. Hippomedon denticidatus (Spence Bate). 



1862. Anonyx denticulatus, Bate, Cat. Amphip. Crust. Brit. Mus., 



p. 75, pi. xii. fig. 4. 



Habitat. — Taken in the vicinity of May Island in 1888, 

 and subsequently in various parts of the estuary between 

 May Island and Inchkeith, but seldom more than a few 

 specimens taken in any single gathering. 



Genus (12) Orchomene, Boeck, 1870. 



13. Orchomene humilis (A. Costa). 



1857. Lysianassa humilis, A. Costa, Mem. del Accad. del Sc. de 

 Napoli, vol. i. p. 187, pi. i. fig. 6. 



1863. Anonyx Edwardsi, Bate and Westw., Brit. Sessile-eyed Crust., 



vol. i. p. 94. 



1890. Orchomene Batei, G. 0. Sars, Crustacea of Norway, vol. i. 



p. 6, pi. xxii. 



Habitat. — In the neighbourhood of the Bass Eock ; rare. 



Genus (13) Tryphosa, Boeck, 1870. 



14. Tryphosa nana, (Kroyer). 



1846. Anonyx nanus, Kroyer, Naturh. Tidsskr., 2 R., Bd. ii. p. 30. 



1891. Orchomenella ciliata, G. O. Sars, op. cit., p. 69, pi. xxv. fig. 2. 



Habitat. — Taken near Joppa in 1888 ; subsequently in 

 other parts of the estuary, but always sparingly. 



Genus (14) Tryphosella, J. Bonnier, 1893. 



15. Tryphosella Sarsi, Bonnier. 



1891. Tryphosa nana, G. O. Sars, op. cit., p. 76, pi. xxvii. fig. 1. 

 1893. Tryphosella Sarsi, Bonnier, Bull. Sci. France et Belgique, 

 vol. xxiv. p. 170 (footnote). 



Habited. — Firth of Forth ; not common. 



16. Tryphosella Horingii (Boeck). 



1870. Tryphosa Horingii, Boeck, Crust. Amphip. bor. et arct. , p. 38. 



Habitat. — Firth of Forth, 1896 ; off the east side of Inch- 

 keith, in 5 fathoms, 23rd May 1901 ; not common. 



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