74 



line of snout with a series of isolated spines, which are conti- 

 nued as a low crest on the concave, very narrow interorbital 



space ; a low somewhat scalloped crest 

 on occiput and nape. In front of each 

 nostril a prominence with about four 

 spines. Orbital borders denticulated ; 

 from their dorsal middle a curved, 

 denticulated ridge runs to end of 

 occiput. Similar ridges below orbitae 

 and on lower surface of snout, which 

 forms a straight line with the lower 

 surface of head. Operculum with a 

 complete denticulated longitudinal keel 

 and radiating lines. Superior cristae 

 of trunk continued to end of dorsal 

 ^ but not continuous with the superior 



cristae of tail; these proceed anteriorly 

 to the frontborder of the last ring of 

 trunk. Inferior cristae of trunk and 

 tail continuous. Median cristae of trunk 

 ending at frontborder of first tail-ring, 

 their end situated below anterior end 

 of superior cristae of tail. Base of dorsal 

 not elevated. Pectorals and anal very 

 small as also the caudal, which is 

 truncated. Alternating dark and light 

 brown transverse bands corresponding 

 with the rings; on the tail the light 

 bands are gaining in size posteriorly. 

 Head darkish, with an indication of 

 irregular light bands; snout with dark 

 points. Length of single specimen 

 known 65 mm. 



Habitat: Karakelang Islands! 



II. Micrognathus Duncker. 



(DUNCKER, Mitt. a. d. naturh. Mus. Hamburg 

 XXIX. 1912, p. 235). 



Fig. 32. Corythoichthys 

 corriigatus M. Web. X 3- 



Body elongate, more or less stout; 

 anteriorly heptagonal, posteriorly tetragonal. Rings transver- 

 sally striated, their keels moderately prominent, smooth or 



