321 



B. 6; D. II. 7; A. 2O 21; P. I. IO; V. 6. 



Elongate, height below dorsal spine 4 4 2 / 5 , head 3'/ 3 3 f / 2 , 

 its width i' 2 / 5 in its length. Dorsal profile somewhat irregularly 

 and slowly sloping down to the rounded, blunt, somewhat 

 spongy, thickened snout, prominent in front of the nearly trans- 

 verse gape of mouth, the length of which goes nearly 2 ! / 2 times 

 in head. Crown of head with furrows and granulate rugae, 

 radiating from a central prominence. The proper occipital process 

 with parallel borders, twice as long as broad, touching with 





Fig. 140. Nedystoma dayi (Ramsay & Ogilby). X V* 



a broad truncate hindborder the cres- 

 centic basal bone of the dorsal spine. 

 This part of the occipital process ori- 

 ginates from a triangular continuation 

 of the occipital shield. The occipital 



shield has anteriorly a deep rounded incisure for the median 

 fontanel, which narrows anteriorly. On both sides bordered 

 by a ridge; besides a narrow bony ridge runs on both sides 

 from the anterior border of the occipital shield to above the 

 frontborder of the eye. Humeral process triangular, with a 

 broad base and sharp posterior point. Eyes only anteriorly 

 with a vestigial orbital ring; more than 5 times in head, i ! / 2 

 in snout, 2 2 ] / 2 in the slightly convex interorbital space, 

 which goes about 2 ! / 2 times in head. Maxillary barbels extend 

 to the posterior border of the gillmembrane or somewhat farther, 

 as also the shorter mandibulary barbels, the mental barbels 

 ! / 3 shorter. Dorsal equal to head or slightly shorter. Dorsal 

 spine flattened, its frontborder slightly serrated only at its top, 

 posterior border with rough teeth, its length much more than 

 that of head without snout, in small specimens nearly equal 



IN DO-AUSTRALIAN FISHES II. 21 



