238 AUCHENOGLANIS BÜTTIKOFERI. 



posteriore stramineis, umbratis fuliginee. Pinna dorsali et 

 adiposa fuligineis, ceteris pinnis umbratis fuliginee. 



Body oblong, head depressed, body anteriorly as broad 

 as high, afterwards the more and more compressed. Depth 

 of body G times in total length without caudal fin, length 

 of head 2Y5 times, wide of body 6 times. Head rough at 

 the upper-side , ramificate-striate , the humeral processes 

 too, the gillcovers are radiate-striate ; there is a weak skin 

 on the cheeks and on both sides of the striated plate of 

 the gillcovers. Head ■^/j as broad as long, '^/.^q as high as 

 broad; snout flat, obtusely pointed, ^^j^^ of the length of 

 the head, as long as the postorbital space. Eyes placed in 

 the middle of the length of the head, directed laterally ; dia- 

 meter of eye T'/^ times in the length of the head, twice 

 in the interorbital width. "Width of the mouth "/2() of ^^^^ 

 of the head, lips wide but thin, without papillae. The prae- 

 maxillary teeth in a short band, which is 1/3 as broad as 

 long; the mandibular teeth in a long band, which reaches 

 with the ends nearly to the mouth-corners, anteriorly it 

 is widened in two groups, which at the symphysis almost 

 touch each other (fig. 3) ; the teeth are of unequal size, those 

 at the outside in the under-jaw near the symphysis are the 

 largest. Six feelers, the maxillary feelers reach to ^j^ of 

 the length of the head, the outer mandibulary feelers to 

 the end of the head and the inner ones come to the gill- 

 opening behind it. Posterior nostril cleft-like, nearer to 

 the eye than to the end of the snout. The occipital pro- 

 cess is nearly twice as long as broad, as long as the eye 

 and it reaches the interneural plate, which is of equal 

 length, both have ramificate streaks on the upper-side. 

 The humeral process is narrow, directed backwards down- 

 wards, P/^ as long as the eye. The frontal groove is 4 

 times as long as broad. The gillmembranes are not united 

 with the isthme and partly with one another, the notch 

 goes till the vertical line of the anterior border of the eye. 



The height of the dorsal fin is equal to ^/,5 of the length 

 of the head, its base is equal to ^/,g, its spine also to V155 



Notes from the Leyden IMuseum, "V^ol. XXXV. 



