BY J. DOUGLAS OGILBY. 163 



Characters included in those of the family. 



Movos, single; Kevrpis, a thorn i^JEHiaxi). 



Type, Monocentris carinata, Bloch and Schneider = Gasferosteus 

 japonicus, Houttuyn. 



Coasts of Japan, Eastern Australia, and Mauritius; approach- 

 ins; the shore during the colder months. 



Monocentris gloria-maris. 



Monocentris japonicus (not Houttuyn), Macleay, Proc. Linn. 

 Soc. N.S. Wales, v. 1881, p. 510. 



Cleidoptis gloria-maris, De Vis, Proc. Linn. Soc. N.S. "Wales, 

 vii. 1882, p. 368. 



D. v-vii. 12. A. 11-12. Sc. 2/14-15/4-5. 



Depth of body If to If, length of head 2^ to 2| in the total 

 length; width of interorbital region 2 to 2J, diameter of eye 3 to 

 3i in the length of the head; snout short and rounded, its height as 

 great as or greater than its length, which is 4 to | of the diameter 

 of the eye; upper profile of head behind the gibbosity slightly 

 concave. Maxillary extending to the vertical from the posterior 

 border of the eye or not quite so far, its length 2 to 2^ 

 in that of the head, its greatest width 4f to 5^ in its length. 12 

 gill-rakers on the lower branch of the anterior arch, the longest 

 about f of the diameter of the eye. Dorsal fin originating above 

 or very slightly behind the base of the pectoral; second spine 

 longest, 1^ to 1^ in the length of the head and a little longer than 

 the third; first spine intermediate in length between the third 

 and fourth; fifth spine short; these five are always present and 

 united by membrane at the base; one or two small spines present 

 or absent between the two dorsals; outer border of soft dorsal 

 rounded, the middle rays about as long as the first spine : anal 

 originating below the middle of the soft dorsal, the antei'ior rays 

 the longest, 2 to 2t in the length of the head: ventral with three 

 or four rudimentary rays and an enormously developed spine,. 



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