174 SILUBID^E. 



total (with the caudal). Adipose fin short ; the pectorals extend to 

 the vertical from the end of the dorsal. (B. if 0.) 

 Indianola, Texas. 



No description of the teeth of this species has been given, so that 

 its position in the system is quite uncertain. 



Appendix to ABUTS. 



The two following species have been described by Sir J. Richardson 

 from specimens which were in a very bad state of preservation, and 

 which appear to have been destroyed since they were described. If 

 the characters assigned to them be correct, they would form the types 

 of one or two distinct genera ; but as this is rather doubtful, we give 

 merely an abstract of the original descriptions for the assistance of 

 those who may rediscover them. 



67. Arius (?) venations. 



Bagrus venaticus, Richards. Voy. Ereb. fy Terr. Fish. p. 33. 

 D. 1/9 or more. A. about '60. V. about 8. 



Head strongly granulated above ; apex of the occipital process, 

 where it meets the small crescentic buckler of the dorsal fin, slightly 

 rounded. Dorsal spine serrated anteriorly and a little undulated 

 posteriorly ; the pectoral spine is equal in length to the dorsal one, 

 and is strongly serrated on both sides. The teeth are villiform. The 

 front of the vomer supports two small roundish dental plates which 

 adhere to each other. The palatine plates are both broader and longer. 

 Barbels six. (Richards.) 



North-west coast of Australia. 



68. Arius (I) vertagus. 



Bagrus vertagus, Richards. Voy, Ereb. 8f Terr. Fish. p. 33. 

 B.6. I>.~. A. 28. V. 9? 



6 or 7 



The dorsal spine is equal in length to the space between its base and 

 the orbit, and is shorter than the pectoral spine, wnich is strongly 

 serrated on both sides. Head granulated above, with the occipital 

 process crescentic at the apex. The vomerine teeth are disposed in 

 two small separate plates, and the palatine teeth form a still smaller 

 plate near each corner of the mouth. Barbels six. (Richards.) 



North-west coast of Australia. 



60. GALEICHTHYS. 



Galeichthys, sp., Cuv. 8f Val. 



Galeichthys, Sleek. Nederl. Tydschr. Dierh. 1863, p. 90. 



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

 spine and with seven soft rays; anal fin rather short. Head and 

 nap a entirely covered with soft skin ; barbels six, four at the man- 



