18 ON NEW OR INSUFFICIENTLY DESCRIBED FISHES 



below the middle of the dorsal, than which it is much 

 shorter and lower. Caudal fin elongate and rounded, 

 as long as the peduncle. Outer edge of pectoral linear 

 above rounded below. 



Upper surface lilaceous with numerous small blackish 

 spots ; sides gray, profusely dotted with darker ; a 

 moderately wide dusky band separates the two colors 

 on the tail running just below the lateral line ; under surface 

 immaculate white : fins colorless. 



Total length 80 milUm. 



Coast of Southern Queensland. 



Described from the single example known. 



DIODONTID^. 



DICOTYLICHTHYS MYERSI Sp. nOV. 



D. 12 ; A. 11 ; P. 20. Width of body 2-85, depth of 

 body 2-85, length of head 2-70 in the length of the body. 

 Length of snout 3-50, diameter of eye 3-05, width of inter- 

 orbit 2-00, height of dorsal and anal fins 2-00, length of 

 caudal 1-50, of pectoral 2-00 in the length of the head. 



Snout linear, rest of head convex above ; mouth below 

 the level of the eye. Head much longer and a little deeper 

 than wide, its length 1-30 in the trunk. Eye moderate, 

 without free lid ; interorbital region concave. Nasal 

 tentacle bifurcate. Spines of head and lower surface 

 erectile, of back and sides fixed, the abdominal and sub- 

 caudal spines much smaller than the others, which are 

 of about equal size throughout, the longest pair being on 

 each side of the caudal peduncle and not so long as the 

 diameter of the eye ; no turbinal nor preorbital spines ; 

 frontal region with a conspicuous median spine, out- 

 side and behind which is a pair of rather smaller lateral 

 spines ; inside and behind these are yet another pair, 

 the inner roots of which overlap one another ; beyond 

 these again are three other pairs similarly arranged, while 

 the hinder border of the occiput is armed with a single 

 spine corresponding to the frontal spine ; two short, widely 

 separated supraorbital spines, followed by a series of eight 

 spines, the first three belonging to the temporal region, 

 the last below the dorsal ; cheeks and opercles with short 

 sharp spines ; caudal peduncle with two pairs, the bases 

 of the upper far overlapping above. Gill- opening narrower 

 than the base of the pectoral. 



