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CHAP. XX.] FISHES. 443
(1 sp.), northern and southern tributaries of Amazon ;
Piratinga
(3 sp.), Amazon Valley ; Seiades (2 sp.), Amazon ; *Pwielodus
(42 sp.), Mexico to La Plata, single aberrant species from West
Africa, Java and the Sandwich Islands ; Pirinampus (1 sp.),
Brazil ; Conorhynchus (1 sp.), Brazil ; Notoglanis (1 sp.), Madeira,
Amazon Valley ; Callophysus (3 sp.). Tropical South America
Auchenaspis (1 sp.), Tropical Africa ; Arius (68 sp.), all Tropical
regions ; Galcichthys (1 sp.), Cape of Good Hope ; Genidens (1
sp.), Brazil; Remipimelodus (3 sp.), India, Sumatra, and Borneo;
Ketingus (1 sp.), Sunda Islands; ^lurichthys (4 sp.), Eastern
United States to Guiana ; Paradiplomystax (1 sp.), Brazil ; Di-
plomystax (1 sp.), Chili ; Osteogeniosus (3 sp.), India to Java
Batrachocephalus (1 sp.), Java and Sumatra ; Bagarius (1 sp.),
India to Java ; Eiidyptosternum (1 sp.), India ; GiyptosternuW'
(8 sp.), Himalayas, Central India, Java, and Sumatra ; Rara (3
sp.), Continental India; Amblyceps (3 sp.). Continental India.
Sub-family 5 (Silukid^ Stenobranchi^) is confined to South
America and Africa, with one genus and species in the Ganges.
Doradina (12 genera). South America
It consists of three groups :
and Africa; Rhinoglanina (3 genera). Central Africa and the
Ganges ; Malapterurina (1 genus), Tropical Africa. The distri-
bution of the genera is as follows :
Ageniosus (4 sp.), Surinam to La Plata ; Tetranematichthys (1
sp.). Central Brazil, Rio Guapore ; Euanemus (1 sp.), Surinam
and Brazil ; Auchcnipterus (9 sp.), Equatorial America ; Centro-
mochlus (2 sp.), Equatorial America; Trachelyopterus (2 sp.),
Equatorial America; Cdopsis (3 sp.), Brazil; Asterophysus (1
sp.), Rio Negro, North Brazil; Doras (13 sp.). Tropical South
America east of Andes ; Oxydoras (7 sp.), Amazon Valley and
Guiana; RUnodoras (3 sp.), Tropical South America east of
Andes ; Synodontis (12 sp.), Tropical Africa ; Rhinoglanis (1 sp.).
Upper Nile; Mochocus (1 sp.), Nile; Callomystax (1 sp.), Nile;
—
Malapterunts (3 sp.). Tropical Africa.
Sub-family 6 (Silurid^ Proteropodes) inhabits Tropical
America and Northern India as far as Tenasserim. It consists
of two groups: the Hypostomatina (17 genera), with the same
distribution as the sub-family, and the Aspredinina (3 genera),
; ;