138 SILURIDJi. 



pose fin is two-seventlis or one-fourtli of tlic total (witiiout caudal) ; 



it is very high in adult examples. Anal fin mucli higher than long. 



Caudal subtriuicated. Brownish ; fins with rounded dark spots. 

 Nile ; Senegal. 



a, b-e. Fine specimens. Chartoum. From Consul Pctherick's Col- 

 lection. 



/. Adult. West Africa. Purchased of Mr. Dalton. 



</. Twenty-six inches long : stuffed. Senegal. Purchased of M. 

 Parzudalii. 



Eighth Group. ARIINA. 



Proteropterous Siluroids with the anterior and posterior nostrils 

 placed close together, and without nasal barbel, the posterior 

 nostril being provided with a valve. 



59. ARIUS*. 



Bagi'us, sp., et Arius, Cuv. ^- Vol. 



Bagrus, sp., Sciades, sp., Ariodes et Arius, Midi. ^ Trosch. 

 Hexanematichthys, Guiritinga, Sciades, Ai-ius, Hemiarius, Ceplialo- 

 cassis, Netunia, Ai-iodes, et Pseudarius, BJeek. Nederl. Tydschr. 

 Dierk. 1863, p. 90. 

 Adipose fin of moderate length or short ; a short dorsal fin with a 

 pungent spine and with seven (sixf) soft rays ; anal fin rather short. 

 Head osseous above ; barbels six, four at the mandible. Teeth on 

 the palate fixed ; the upper jaw is the longer. Eyes with a free 

 orbital margin. Caudal fin forked ; ventral with six rays, attached 

 behind the vertical from the dorsal. 

 Tropical regions. 



* a. Teeth on the palate inlliform or cardiform. 



1. Bagi'us tracliipomus, C. # V. xiv. p. 443. — ^Bengal. 



2. Chinta-jellah, Russell, pi. 167. — Bagrus chinta, C. if V. xiv. p. 445. — 



Cororaandel. 



3. Bagrus pemecus, C. tf- V. xiv. p. 456. — Cayenne. 



4. couma, C. ^" V. xiv. p. 459. — Cayenne. 



5. Arius subrostratus, C. tj- V. xv. p. 62. — Malabar. 



6. rostratus, C. ^ V. xv. p. 63. — Alipey. 



7. belangerii, C. 4" V. xv. p. 71. — Bombay. 



8. Leptarius dowii, Gill, Proc. Acad. Nat. Sc. Fhilad. 1863, p. 170. — -West 



coast of Central America. 



9. Ai'ius nigricans, Valenc. in d' Orb. Voy.Amir. Mir id. All. Poiss. pi. 3. fig. 3 ; 



C. cf- V. XV. p. 83. — South America. 

 10. Silurus quadrimaculatus, Bl. tab. 368. fig. 2 ; Bl. Schn. p. 383. — Pime- 

 lodus quadrimaculatus, C. ^ V. xv. p. 185. — America. 



j3. Teeth on the palate gramdar. 



1. Pimelodus jatius, Ha7n. Buch. pp. 171, 376. — Arius jatius, Blyth, Calc. 



Journ. As. Hoc. Beng. xxix. p. 151. — Granges. 



2. Arius moUiceps, C. cf V. xv. p. 108. — Hah. ? 



3. puncticulatus, C. 4~ V. xv. p. 108. — Buenos Ayres. 



t All the species examined by myself have seven dorsal rays ; Valenciennes 

 however, mentions six only in several South American species. 



