CHAP. XX.] 
FISHES. 
439 
Mexico to La Plata ; Mesonauta (1 sp.), Brazil ; Petenia (1 sp.), 
Lake Peten, Guatemala ; Uaru (2 sp.), Brazil ; Hygrogonus 
(1 sp.), Brazil ; Cichla (4 sp.). Equatorial America ; Crenicichla 
(9 sp.), Brazil and Guiana ; Chcetobranchus (3 sp.), Brazil and 
Guiana ; Mesops (2 sp.), Brazil ; Satanoperca (7 sp.), Amazon 
Valley and Guiana ; Geophagus (1 sp.), North Brazil and Guiana ; 
Symphysodon (1 sp.). Lower Amazon; Pterophyllum (1 sp.), 
Lower Amazon. 
Order III. —ANA CANTHINI. 
Family 53.— GADOPSIDZE. (1 Genus, 1 Species.) 
“ Fresh- water fish, with rather elongate body covered with very 
small scales, the upper jaw overhanging the lower, forming an 
obtuse snout.” 
Distribution. — Kivers of Australia and Tasmania. 
Family 5'Sa. — LYCODIDiE. (3 Genera, 14 Species.) 
“Marine fishes, with elongate bodies, and the dorsal united 
with the anal fin.” 
Distribution. — Arctic seas of America and Greenland, and 
Antarctic seas about the Falkland Islands and Chiloe Island. 
Family 54. — GAD ID Ah (21 Genera, 58 Species.) 
“Marine fishes, with more or less elongate bodies covered 
with small smooth scales.” 
Distribution.— Cold and temperate regions of both hemi- 
spheres ; in the North extending as far south as the Mediterranean, 
Canary Islands, New York and Japan (and one species to the 
Philippines and Bay of Bengal), and in the South to Chili and 
New Zealand. 
Gadus (Cod), Merluceius (Hake), Phycis, Lota , Molva . , Concilia , 
Motella , and Paniceps , are British. Lota inhabits fresh waters. 
