AMPHIPODA AND ISOl'ODA OV THE FIRTH OF CLYDE. 2()5 



into a basin with sand and sea-water, but none made 

 any attempt to burrow. 



It is a curious fact that the araphipoda met with 

 at these great banquets, so far as I have seen, are 

 mostly of one species. Sometimes they are exclusively 

 Tryphosa nanoides, or at other times wholly Lafystius 

 sturio)iis, Ovchomenella ciliata, or Callisotna crenatum. 

 Whether each species has its own particular prey, 

 or whether the weaker species give way to the 

 stronger, cannot easily be proved. 



Genus O r c H o M e N E, Boeck. 



ORCHOMENE BATEI, G. O. Sars. 



Anonyx Edwardsii, S. Bate (not Kroyer), Brit. 

 Mus. Catal. Amph. Crust. (1862), p. 73; pi. xi. fig. 5. 



Anonyx Edwardsi, Bate and Westwood, Brit. Sess. 

 Crust., vol. i. (1861), p. 94. 



0)-cho7nene Batei, Sars, Oversigt af Norges Crus- 

 taceer, Christiania Vidensk.-Selsk. Forhandl. 1882, 

 No. 18, p. 81.— Sars, Crustacea of Norway, Amphipoda, 

 part 3 (1890), p. 60 ; pi. 22. 



? Anonyx melanophthahnus, Norman, Report Brit. 

 Assoc. 1866 (1867), p. 201. 



Habitat. — Between the Tan Buoy and Bute, in 18 

 fathoms; Loch Striven, in 20 fathoms; Lochgoil, in 

 .30 to 40 fathoms ; and Lochfyne, in 10 to 12 fathoms. 



Genus Tryphosa, Boeck. 

 TRYPHOSA NANUS (Kroyer). 



Anonyx nanus, Kroyer, Naturh. Tidsskr., 2 K. 2 B. 

 (1846), p. 30. 



Tryphosa nanus, A. Boeck, Crust, amphip. bor. et 

 arct. (1870) p. .37.— A. Boeck, De Skand. og Arkt. 

 Amph. (1876), p. 181. 



Habitat. — Dredged off Fairland Point, Cumbrae, in 

 23 fathoms, bottom sandy gravel and full of living 

 organisms. It is my impression that such living 

 organisms are seldom plentiful when the bottom is 

 covered with dead animal remains. 



