54:8 CYPRINID^E. GYMNOTID^I. 



Genus LEUCISCUS. 



64. Leuciscm rutilus (Linn.) . Roach. 

 Hab. British fresh waters. 



65. Leuciscus cephalus (Linn.). Chub. 

 Hab. British fresh waters. 



66. Leuciscus vulgaris, Mem. Common Dace. 

 Hab. British fresh waters. 



67. Leuciscus phoxinus (Linn.). Minnow. 

 Hab. British fresh waters. 



Genus TINCA. 



68. Tinea vulgaris, Cuv. Common Tench. 

 Hab. British fresh waters. 



Genus ABRAMIS. 



69. Abramis brama, Linn. Bream. 

 Hab. British fresh waters. 



Genus MISGURNUS. 



70. Misgurnus fossilis (Linn.). Thunder-fish. 

 Hab. Baltic Sea. 



a. Purchased, Nov. 1860. 



Genus NEMACHILUS. 



71. Nemachilus barbatulus (Linn.). Common Loach, 

 Hab. British fresh waters. 



Family GYMNOTID^]. 



Genus GYMNOTUS. 



72. Gymnotus electricus, Linn. Electric Eel. 

 Hab. British Guiana. 



