8. Symbranchus has two Indian and one South American species.
9. Prototroctes, the singular antarctic analogue of Coregonus, consists of two species, one in the south of Australia the other in New Zealand.
10. Galaxias is equally represented in Southern Australia, New Zealand, and the southern parts of South America.
C. Families identical in distant continents—
1. The Labyrinthici, represented in Africa by 5, and in India by 25 species.
2. The Chromides, represented in Africa by 25, and in South America by 80 species.
3. The Characinidæ, represented in Africa by 35, and in South America by 226 species.
4. The Haplochitonidæ, represented in Southern Australia by one, in New Zealand by one, and in Patagonia by a third species.
This list could be much increased from the families of Siluridæ and Cyprinidæ, but as these have a greater range than the other Freshwater fishes, they do not illustrate with equal force the object for which the list has been composed.