CHAP. XX.] FISHES. 443 



(1 sp.), northern and southern tributaries of Amazon ; Piratinga 

 (3 sp.), Amazon Valley; Sciades (2 sp.), Amazon; Pimelodus 

 (42 sp.), Mexico to La Plata, single aberrant species from West 

 Africa, Java and the Sandwich Islands ; Pirinavijyus (1 sp.), 

 Brazil ; Conorhynchus (1 sp.), Brazil ; Notoglanis (1 sp.), Madeira, 

 Amazon Valley ; Ccdloiihysus (3 sp.), Tropical South America ; 

 AuchencLspis (1 sp.), Tropical Africa ; Arius (68 sp.), all Tropical 

 regions ; Gcdeiclithys (1 sp.). Cape of Good Hope ; Genidcns (1 

 sp.), Brazd; Hemipimdodus (3 sp.), India, Sumatra, and Borneo ; 

 Ketingus (1 sp.), Sunda Islands ; ^luricMliys (4 sp.), Eastern 

 United States to G-uiana ; Paradiplomystax (1 sp.), Brazil ; Di- 

 plomystax (1 sp.), Chili ; Osteogeniosus (3 sp.), India to Java ; 

 Batrachocephalus (1 sp.), Java and Sumatra ; Bagarms (1 sp.), 

 India to Java ; Eudyptostermim (1 sp.), India ; Glyptostemmiv 

 (8 sp.), Himalayas, Central India, Java, and Sumatra ; Hara (3 

 sp.), Continental India; Amhlyceps (3 sp.), Continental India. 



Sub-family 5 (Silurid^ Stenobranchi^e) is confined to South 

 America and Africa, with one genus and species in the Ganges. 

 It consists of three groups : Doradina (12 genera). South America 

 and Africa; Ehinoglanina (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 ; Tctranematichthys (1 

 sp.). Central Brazil, Eio Guapore ; Euanemus (1 sp.), Surinam 

 and Brazil ; Auchenipterus (9 sp.), Equatorial America ; Centro- 

 mochlus (2 sp.), Equatorial America ; Trachelyopterus (2 sp.), 

 Equatorial America ; Cetopsis (3 sp.), Brazil ; Asterop)hysus (1 

 sp.), Eio Negro, North Brazil; Doras (13 sp.). Tropical South 

 America east of Andes ; Oxydoras (7 sp.), Amazon Valley and 

 Guiana; Rliinodoras (3 sp.), Tropical South America east of 

 Andes ; Synodontis (12 sp.), Tropical Africa ; Rhinoglanis (1 sp.). 

 Upper Nile ; Mocliocus (1 sp.), Mle ; Gallomystax (1 sp.), Nile ; 

 Mcdapterurus (3 sp.), Tropical Africa. 



Sub-family 6 (Silurid^e Proteeopodes)] inhabits Tropical 

 America and Northern India as far as Teuasserim. It consists 

 of two groups: the Hypostomatina (17 genera), with the same 

 distribution as the sub-family, and the Aspredinina (3 genera). 



