8. SILURUS. 33 



dinger, no. 9; Pall. Zoogr. Ross.- As. p. 82 ; Cuv. 8f Va». xiv. p. 323. 



?1. 409 ; Cuv. Regne Anim. III. Poiss. pi. 96. fig. 1 ; Nilss. Skand. 

 ? aun. iv. p. 359;* Qronov. Syst. ed. Gray, p. 134; Rapp, Fische 

 Bodensee's, p. 12. 

 Mai, Osbeck, Vet. Akad. Handl 1756, p. 34. tab. 3. 

 Skeleton : Rosenthal, Ichthyot, Taf. t. 9. figs. 1-7. 



D. 4. A. 90. P. 1/16. Y. 12. Vert. 17/51-52. 



Maxillary barbels much longer than the head. Pectoral spine in- 

 distinctly serrated at its extremity. Vomerine teeth in an uninter- 

 rupted band. Anal and caudal broadly united. 



European rivers east of the Rhine. 



a. Fine specimen. Feder-see. From the Stuttgart Museum. 



b. Young : skin. From Gronow's Collection. 



c. Adult: skeleton. Feder-see. From Mr. Gerrard's Collection. 



d. Young : skeleton. Berlin. From Dr. A. Giinther's Collection. 



e. Skull of a very large specimen. Berlin. From Dr. A. Giinther's 



Collection. 



** Barbels four. 

 2. Silurus dauricus. 



Pallas, in Nov. Act. Petropol. 1787, i. p. 359. pi. 11. fig. 11; Cuv. Sf Vol. 

 xiv. p. 351. 



D. 5. A. 90. P. 1/13. V. 13. 



Snout obtuse, depressed, rounded, with the lower jaw prominent. 

 The maxillary barbels extend to the base of the pectoral, and are 

 four times as long as the mandibulary pair. Pectoral spine serrated 

 along its outer edge ; anal and caudal confluent. {Pall.) 



Dauria. 



3. Silurus asotus. 



Silurus asotus, L. Syst. Nat. i. p. 531 ; Bl. Schn. p. 378 ; Basil, in Nouv. 



Mem. Soc. Nat. Mosc. 1855, x. p. 240. tab. 3. fig. 4 (not C. 8f V.). 



punctatus, Cant. Ann. 8f Mag. Nat. Hist. 1842, ix. p. 485. 



xanthosteus, Richards. Voy. Sulph. Fish. p. 133. pi. 56. figs. 12- 



14; Ichth. Chin, p. 281. 



sinensis, Richards. Ichth. Chin. p. 281 (not M'Clell.). 



japonicus, Schleg. Faun. Japon. Poiss. p. 226. pi. 104. fig. 1; 



Richards. Ichth. Chin. p. 281. 



D. 5-6. A. 76-82. P. 1/14. V. 13. 



Snout obtuse, depressed, rounded, with the lower jaw prominent. 

 The band of vomerine teeth is scarcely interrupted in the middle, and 

 sometimes subcontinuous. Maxillary barbels not twice as long as 

 the head, mandibulary barbels about half' as long. Pectoral spine 

 strong, with the outer edge strongly serrated ; the length of the pec- 

 toral is three-fifths of that of the head. Anal and caudal fins confluent. 



China and Japan. 



a. Adult. Japan. Purchased of Mr. Frank (S. japonicus). 



b. Young. Japan. From Dr. P. v. Bleeker's Collection. 



c. Fine specimen. Chikiang. From Mr. Fortune's Collection. 

 d,e,f-g,h-i. Adult and half- grown. China. 



vol. v. D 



