122 PEHCID^. 



illary bone gradually widens from the front towards behind, and is 

 moreover distinguished by a prominent triangular process at the 

 hinder, lower angle. The praeopereulum has a rounded angle and 

 rather convex limbs, the posterior of wliich is minutely serrated ; 

 the operculum -wdth three long, pointed, very prominent spines, and 

 deep notches between, the upper one more distant and the middle 

 one rather longer; the sub- and interoperculum are serrated, the 

 former along the anterior half of its length, and produced into an 

 elongate point behind. There are, above and beneath, two pairs of 

 strong canine teeth ; otherwise the dentition is very similar to that 

 of S. coronatus, except in the posterior front teeth being much shorter. 

 The iirst interhsemal spine is of moderate development, being equal 

 to the length of the first six vertebra ; it is fixed to the haemal of 

 the eleventh vertebra. 



48. Serranus sonnerati. 



Perca rubra, Sonnerat. 



Serranus sonnerati, Cuv. Sf Val. ii. p. 299. 



D. -S-. A. ^. 



14-15 9 



CaudaHs rounded ; prsoperculum with a few obsolete denticula- 

 tions. Uniform brownish (in spirits) ; head, in life, with reticulated 

 blue lines . 



Coasts of Pondicherry, Ceylon, and Sumatra ; Louisiade Archi- 

 pelago. 



a. Adidt. Sumatra. From Mr. Frank's Collection. 

 6, c. Half-grown : stuffed. Louisiade Archipelago. From the 

 Yoyage of the Rattlesnake. 



49. Serranus urodelus. 



Perca urodela, Forst. Descr. Atiim. Cur. Lichtenst. p. 221. 

 SeiTanus urodelus, Cuv. df Val ii. p. 306, vi. p. 513 ; Bleek. Kokos- 

 eilanden, p. 39. 



D. ^. A. 4. L. lat. 85. 



15 8 



Caudalis rounded. Sub- and interoperculum slightly denticulated 

 where they are joined ; praeoperculum entii'e below, finely serrated 

 behind ; operculum with three conspicuoiis spines. Maxillary bone 

 reaching far behind the level of the eye ; the diameter of the eye 

 one-sixth of the length of the head ; length of the head one-third of 

 the total. Unifoi-m brown (in spirits) ; lainder half of the dorsal fiji, 

 caudalis, and anahs ^xiih. pale (in life red and blue) spots ; caudalis 

 ^vith two obhquc wliitish bands, convergent posteriorly. 



Amboyna ; Caroline and Kokos Islands. 



a. Large specimen. India. 



b. Adult. Amboyna. From Mr. F'-nnk's Collection. 



