114 
SILURIM. 
EUTROPIUS, Mull. & Trosch. 
384. Eatropius, sp. incerta. 498. J 
River Rovuma : immature specimens. 
BAGRUS, Cm. & Val. 
385. Bagrus bayad. [499.] 
Silurus bajad, Forsk. p. 6G. 
Bayatte, Sonnini, pi. 27 (bad). 
Porcus bayad, Geoffr. Desc. Eg. Poiss. pi. 15. f. 1. 
Bagrus bayad, Cuv. <5f Val. xiv. p. 397 ; Gunth. Fish. v. p. 69. 
Pangani river. East coast of Africa. Nile. Senegal. 
ARIUS, Cuv. & Val. 
386. Arius thalassinus. [120,151,407.] 
Deddi jella, Russell, pi. 169. 
Bagrus thalassinus, Rupp. N. W. Fische, p. 75, t. 20. f. 2. 
bilineatus, Cuv. Val. xiv. p. 434. 
netuma, Cav. § Val. xiv. p. 438, pi. 417. 
Arius nasutus, Cuv. fy Val. xv. p. 60. 
Netuma nasuta, Bleek. Atl. Ichth. ii. t. 61. 
thalassina, Bleek. Atl. Ichth. ii. p. 28. 
Arius thalassinus, Gunth. Fish. v. p. 139. 
Aden. Zanzibar. Red Sea. East Indies and East- Indian archipelago. 
387. Arius falcarius. [501.] 
Arius falcarius, Richards. Voy. Sulph. Fish. p. 134, pi. 62. figs. 7-9; Gunth. Fish. v. p. 168. 
schlegelii, Bleek. Nederl. Tydschr. Dierk. 1863, p. 146. 
Varietas africana. — The African variety of A. falcarius differs from the Asiatic one in 
the following points only. The maxillary barbels extend to the end of the humeral 
process, the triangular patches of palatine teeth are somewhat larger, the bones of the head 
a little more coarsely granulated, and the dorsal spine less distinctly serrated behind, 
which differences cannot justify the creation of a distinct species. 
It is not a little remarkable that this species, hitherto only known as existing in the 
Chinese seas, should be found far up in an East-African river, and never, as far as we 
are aware, in the saltwater of that region; but it is very probable that it will be 
discovered eventually in some of the intermediate regions. 
Pangani river. Chinese seas. 
