158 pERcro.K. 



Labrus L-cvis, Lacep. iii. pi. 23. f. 2. pp. 431, 479. 

 Plectropoma melanoleucum, Cuv. ^ Val. ii. p. 388 ; Peters, Wiegm. 

 Arch. 1855, p. 238. 



U 8 



Praeopcrciiliun with entire posterior margin, and with four or five 

 spinous teeth below; caudahs truncated. Grey, with five black 

 cross-bands. 



Isle de France ; Ibo (Mozambique). 



5. Plectropoma nigrombrum. 



Cuv. ^ Val. ii. p. 402; Quoy Sf Gaim. Voy. Astrol. Pom. p. 059. 

 pi. 4. f. 1. 



I>-T^8- A-f- Caec. pylor. 8. 



Praeoperculum finely serrated behind, and with two equal and 

 strong spinoiis teeth below, one of which is placed at the angle. 

 Caudalis truncated. Reddish yellow, with five black cross-bands. 



King George's Sound. 



a. Adult : stuffed. Sine patria. 



h. Half-grown : stuffed. Sine patria. 



6. Plectropoma annulatum. (Plate XI. fig. B.) 

 D. 1^. A. 4- L. lat. 50. L. transv. 7/20. 



Praeoperculum finely serrated behind, and with three spinous 

 teeth below, one of which is placed at the angle. Caudalis rounded. 

 Red (?), with six black cross-bands, occupying the whole depth of 

 the body and taU; sides of the head and nape with three black 

 bands, obhquely descending forwards. 



Hah. ? 



a. Adult. From the Haslar Collection. 



Description of the specimen. — The form of the body is rather 

 elevated, its greatest depth being somewhat more than one-third of 

 the total length ; the length of the head (opercular spine included) 

 equals the depth of the body. The snout is moderately pointed and 

 slightly longer than the diameter of the eye. The cleft of the 

 mouth is wide and obhque, the upper maxillary extending nearly 

 to below the centre of the eye. The snout is nearly scaleless, the 

 upper maxillary and the mandibula exhibiting minute and rudi- 

 mentary scales only ; one-half of the praiorbital covered with distinct 

 and small scales. The eye is situated high up the side ; the bony 

 margin of the orbit is projecting, especially on the upper half, so 

 that the space of the forehead between the eyes appears concave ; 

 the diameter of the e} e is 4i in the length of the head, and much 

 larger tlian the distance between the eyes. 



AH the other parts of the skull are thickly covered with scales ; 

 the prcEopercidum has the posterior limb finely serrated, one short 

 and obtuse spine at the angle, and two longer ones of equal size at 



