40. PLATTCEPHALTT3. 183 



of the caudal as 1 : 1*5. The structure of the single bones does not 

 differ from PI. insidiator. 



The villiform band of intermaxillary teeth is much broader than 

 that of the mandibula. The vomerine teeth are in two separate 

 oblong groups, with a groove between ; the palatine teeth form a 

 very narrow band. 



10. Platycephalus guttatus. 

 Tem7n. 8f Schleg. Faun. Japon. Poiss. p. 39. pi. 15. f. 2. 

 D. 9 I 12. A. 12. 



Ridges of the head spinous. Brownish-grey, dotted with black ; 

 back with eight blackish cross-bands. All the fins with dark spots, 

 arranged in series. 



A doubtful species from the coast of Japan. 



11. Platycephalus isacanthus. 



Cuv. 8f Val. iv. p. 24G ; Cut. Rk/ne Anitn. III. Poiss. pi. 22. f. 3 (not 

 good) ; Less. Voy. Coq. Zool. Poiss. p. 214. 



D. 1 I 8 I 12. A. 12. 



The first dorsal spine rather long and slender ; the prseopercular 

 spines short and nearly equal ; spines on the crown of the head and 

 the orbit ; a pair of turbinal spines ; lateral line smooth ; no ten- 

 tacle above the orbit. Brown, with obsolete cross-bands ; aU. the 

 fins dotted with brown. (Guv.) 



Seas of Waigiou and Bum. 



12. Platycephalus serratus. 



Cuv. Sf Val. iv. p. 259. 



D. 1 I 8 I 12. A. 11. 



The length of the head is one-foui-th of the total ; the width of 

 the groove between the eyes is one-fourth of their dianaeter. The 

 ridges on the upper surface of the head and on the infraorbital ring 

 are serrated, that of the operculum is smooth. Two prseopercular 

 spines, the upper of which is the longer. Lateral line smooth. 

 Reddish -brown, with cross-bands ; fins with blackish spots ; dorsal 

 with a blackish blotch ; ventrals above blackish. (Cuv.) 



Coast of Trincomalee. 



13. Platycephalus polyodon. 



Bleeker, Batavia, p. 462. 



D. 1 I 8 I 11. A. 11. L. lat. 60. 



The length of the head is one-third of the total, and its breadth 

 one-haLf of its length. The width of the space between the orbits 



