88 CLASS XIV. 



Sp. SaccohrancJtas fossilis, Silurus fossllis Bloch, IcJith. Tab. 370, fig. 2; 

 H. Buchanan, Fishes of the Ganyes, PL 37, fig. 46 ; in Bengal. The sin- 

 gular, elongated aii'-sacs receive a branch from the branchial arteries, and 

 their veins go to the aorta ; consequently they are respiratory organs sup- 

 plementary to the gills ; see J. Taylok, Edinburgh Journal of Science, 

 V. 1834. 



Clarias Geonov., Valenc, Macropteronotus Lacep., Hetero- 

 hranchus Geoffe. Head mailed. Body naked. Teeth veiy tliin, 

 crowded in both jaws and in vomer. Branchiostegous membrane, 

 with 9 — 15 rays. Dorsal fins two, the second adipose, or a single, 

 long fin, supported by rays. Cirri eight or six. Arborescent 

 appendages, adhering to the third and fom-th branchial arch. 



a) Dorsal fin single; ivith 8 cirri. Clarias Geonov., Valenc. 



Sp. Clarias Hasselquisti Valenc, Silurus anguillaris L. (excl. synon.), 

 Sonnini Voyage en Egypte, PL 22, fig. 2, Cuv. R. Ani., ed. ill., Poiss. PL 

 10 J, fig. 2 (the branchial appendages fig. 2a, 2b.) — CAarmwiA Hasselquist, 

 It. Pakestin., p. 371, Karmouth Sonnini; in the Nile; — Clarias marpus 

 Valenc, Gronov. Zoophylac. Tab. 8, fig. 3 — 5, &c. 



b) Dorsal fins 2 ; uith 6 cirri. UeterobrancMis Valenc 



Sp. Heterohranchus GeoffroyiY alenc, Heterohranclms bidorsalis Geoffb.., &c. 



Plotosns Lacep. Head and body naked. Teeth conical, crowded 

 in maxillce, globose or rotundate in vomer. Branchiostegous mem- 

 brane with ten or eleven rays. Dorsal fins two, supported by rays, 

 second elongate, confluent at the acuminate apex of tail with the 

 caudal and anal. First ray of dorsal fin and of pectoral fins 

 dentate. 



Sp. Plotosus lineatus Valenc, Lacep. Poiss, v. PL 3, fig. 2, Platystacus an- 

 grdllaris Bloch Ichth. Tab. 373, figs, i, 2, Syst. Ichth. Tab. 74 ? — Plotosus 

 alhilahris Valenc, Gueein Iconogr., Poiss. PL 53, fig. 3, &c. 



Malapteruriis Lacep. Head and body naked. Teeth small, 

 congested into a crescentic row in each maxilla. Branchiostegous 

 membrane with 7 — 8 rays. Dorsal fin single, adipose, remote. 

 Pectoral fin unarmed. 



A ilia Gray, Yalenc. Venti^al fins approaching the pectoral, 

 subthoracic. Anal fin long. Body compressed. Eight long cirri. 



Sp. Malapterus (sic) Ailia Bcngalensis Geat, Indian Zoology, PL 85, fig. 2. 



Malcqiterurus Lac, Valenc. Ventral fins remote. Anal fin 

 short. Body roxmd. Six short cirri. 



