CATALOGUE OF BRITISH CRUSTACEA. 



Cancer (Astacus) locusta, Penn. Brit. Zool. iv. p. 17. 

 Cancer (Gammarus) locusta, Mont. Linn. Trans, xi. p. 359. 

 O. pulex, O. Fabr. Faun. Gr. p. 254 ? 



h. British Coast (in pools left by the tide). 



2. GAMMARUS FLUVIATILIS. The Freshwater Screw. 



Gammarus fluviatilis, M. Edw. Crust, iii. p. 45. 



Astacus fluviatilis, Rcesel. Ins. Bel. iii. t. 52 ; Geoff. Hist. Ins. t. 21 



f. 6. 



Squilla pulex, Degeer, Mem. viii. t. 33. 



Gammarus Roeselii, Gervais, Ann. Sc. Nat. 2nd ser. iv. p. 128. 

 Gammarus aquaticus, Leach, Enc. Brit. SuppL i. p. 425. 



9' Duddingston, near Edinburgh. From the collection of Dr. 

 Leach . 



3. GAMMARUS PULEX. The Flea-Screw. 



Gammarus pulex, Fabr. Ent. Syst. ii. p. 516 ; Latr. Hist. Nat. 



Crust, vi. p. 316 ; Mont. Linn. Trans, ix. t. 4, f. 2 ; Desm. Cons. 



p. 267, t. 45, f. 8 ; M. Edw. Crust, iii. p. 48. 

 Cancer pulex, pt. Linn. Syst. Nat. i. p. 1055 ; Geoff. Ins. Par ii 



p. 667, t. 21, f. 6. 

 Astacus pulex, Penn. Brit. Zool. iv. p. 17. 



a c. Ireland (Loch Neagh). Presented by W. Thompson, Esq. 



? 4. GAMMARUS SUBTEEBANEUS. 



Gammarus subterraneus, Leach, Ed. Enc. vii. p. 403. 

 Garamarus pulex, var. jun.? 



Well, St. Bartholomew's Hospital, London. 



5. GAMMARUS MARINUS. Leach's Coast-Screw. 



Gammarus marinus, Leach, Linn. Trans, xi. p. 359 ; Desm. Cons. ii. 

 p. 267 ; M. Edw. Ann. Sc. Nat. xx. p. 367 ; Crust, iii. p. 46 ; 

 Thomp. ( W.} Ann. Nat. Hist. xx. p. 242. 



a e. S. Coast of Devon. From the collection of Col. Montagu. 



6. GAMMARUS CARINATUS. The Keeled Coast-Screw. 



Gammarus carinatus, Johnston, Zool. Journ. iv. p. 52. 

 Berwickshire Coast. Dr. George Johnston. 



