144 Mr. C. Spence Bate on British Edriophthalmous Crustacea, 



2. G. carinatics ? Johnston. 



Berwickshire coast, Dr. Geo. Johnston [Whitens Catalogue of the 

 British Crustacea). 



3. G. Locusta (Fabr.). Upper antenna not much longer than 



lower. Stylets of the last of the posterior pleopoda subequal. 

 All round Europe. 



4. G. fluviatilis (Edwards) . Scarcely differs from G. Locusta, 

 Freshwater streams. Wales ; Devon, C S. B. Duddingston 



near Edinburgh, Dr. Leach {White's Cat. Brit. Crust,). 



5. G, Pulex {fdhv.), B^esemhhs G, fluviatilis. Spines upon the 



posterior portion of the abdomen *. 

 Freshwater streams. Ireland (Loch Neagh), W, Thompson, 

 Esq, (White's Catalogue of the British Crustacea), 



6. G. gracilis. Upper antenna much longer than the lower. 



Last pair of the posterior pleopoda with the stylets unequal. 

 Plymouth, C, S, B, Crimea, Rathke. Probably all round 

 Europe. 



7. G. campylops (Leach). Eye in form of the letter S. 



Isle of Arran (near Loch Ranza), Dr, Leach's Coll, {White's 

 Cat. Brit, Crust.), Belfast, Thompson {Ann. Nat. Hist. 1847). 



8. G. marinus (Leach). Antennse short and robust. Hands of 



the gnathopoda truncated in appearance. The stylets of 

 the last of the posterior pleopoda subequal. 

 Starcross, C, S. B, Strangford Lough, Mr, Hyndman {Ann. 



Nat. Hist. Oct. 1847). Sligo, Mrs. Hancock {Ann. Nat. Hist. 



Oct. 1847). Devonshire, Dr, Leach {Linn, Trans, vol. xi.). 



9. G, palmatus (Montagu). 

 Melita palmata (Leach). 



First gnathopod with a very small hand ; second with hand 



very large and square. Dactylos scimitar- shaped. 

 Devon, Montagu, Plymouth, C. S, B, 



10. G. Othonis (Edwards). Hands subequal, long, and nar- 

 row towards the extremity. The last of the pleopoda with 

 stylets equal. 



Plymouth, C. S. B, 



* This description is taken from M. Milne-Edwards's Histoire des 

 Crustaces. 



