154 Mr. C. T. Eegan on new 



maxillary and outer mandibulary barbels as long as the head. 

 12 or 13 gill-rakers on the lower part of anterior arch. 

 Dorsal 1 5, the spine nearly | the length of head^ with a few 

 weak denticulations anteriorly, nearly smooth or very finely 

 denticulated posteriorly ; procurrent part of caudal com- 

 mencing above the middle of anal, anteriorly very low and 

 without distinct rays. Anal 85-90. Pectoral not extending 

 to the base of ventrals, its spine similar to but a little longer 

 than that of the dorsal ; ventrals extending a little beyond 

 the origin of anal. Uniformly greyish. 



Two specimens from Sogeri, total length 122 mm., pre- 

 sented to the British Museum by Captain F. R. Barton. 



The recently described N. novce-gumece from the northern 

 part of the island is said to have the head as deep as broad, 

 the diameter of eye 2^ to 2^ in the interorbital width (If in 

 iV. hartoni), the dorsal spine ^ the depth of body {'^ in 

 iV". hartoni) and longer than that of the pectoral. 



The genus Neosilurus, Stdr., established in 1867 for 

 iV. hyrtlii, Stdr., includes also Copidoglanis brevidorsalis, 

 Gthr., and C. novce-guinece, M. Weber. Copidoglanis differs 

 in having the procurrent part of the caudal fin well developed 

 and similar to the anal. 



None of the Siluridse have more than one rayed dorsal fin, 

 if we except those forms in which rays are developed in the 

 adipose fin. The Plotosin^ have been described as having a 

 long second dorsal fin, but this is really an extension forward 

 of the caudal fin, as is proved by the structure, basalia (inter- 

 neurals) being absent. In quite a different group, the 

 Chacinge, the caudal extends forward some distance both 

 above and below, so that the genus Chaca has been said to 

 have two dorsal and two anal fins. Clarias has been wrongly 

 associated with the Plotosinse, for the long dorsal fin of this 

 genus is supported by basalia and is the homologue of the 

 short dorsal of the allied Saccohranchus. 



Arius (Hemiaruis) danielsi. 



Depth of body 4^ in the length, length of head 3|. 

 Breadth of head 1;^ in its length, length of snout 3, diameter 

 of eye 7-^, interorbital width 2. Upper surface of head 

 granulated ; occipital process with median keel, 1-^as long as 

 broad, extending to the small basal bone of the dorsal spine. 

 Lower jaw shorter than the upper; teeth on the vomer 

 forming 2 small round separate patches, contiguous to the 

 palatine bands, which are rather more than twice as long as 



