6. H^MULON, 313 



the orbit. The basisphenoid is distinguished by a very deep longi- 

 tudinal groove, arising from the condyloid process of the basioccipital. 

 • The intermaxillaries are furnished with very elongate posterior 

 processes, much longer than the bone itself. Cuvier might have 

 placed this species in his family of Mcenides wdth greater propriety 

 than several species of Ccesio. The maxillary bone, as in most o( the 

 species of Mcemuhn and Pristipoma, is broadest near its base, where 

 it is hidden below the large praeorbital, the free part being narrow, and 

 nearly of equal width to the posterior extremity. The anterior part 

 of the vomer is slightly swollen and rounded. The mandibulary 

 has four wide cavities below, separated from one another by deUcate 

 transverse bones. The operculum has no prominent point, and is 

 irregularly quadrangular, the posterior side being slightly emarginate. 

 The prseoperculum has the strongest denticiilations at the angle, the 

 posterior margin slightly concave and the inferior convex ; its muci- 

 ferous channel has four wide openings with thin bones between, as in 

 the mandibular channel. The praeorbital is very large, triangular, 

 with the inferior side curved ; three or four muciferous cavities of 

 considerable width. Suprascapula with some denticulations. 



The exterior row of the maxillary teeth, as well as of the mandi- 

 bulary, contains several larger conical teeth, and there is also a large 

 tooth at the posterior extremity of the row. 



There are eleven abdominal and fifteen caudal vertebrce, the 

 length of the former portion of the colximn being l-o that of the latter 

 as 1 : 1-44. The first interhaemal is strong, and equals the length of 

 the first eight vertebrae together. 



10. Hsemulon caudimacula. 



Cuv. 4- Val. V. p. 236. 



10 7 



Caudalis forked. Brownish oblique streaks on the back and sides ; 

 a black spot on each side of the root of the caudal fin ; ventral and 

 anal fijis blackish. (Cuv.) 



Coast of Brazil. 



11. Hsemulon chrysoptenun. 



Catesby, Hist. Nat. Carol, ii. p. 2. pi. 2. f. 1. 

 Perca chrysoptera, Linn. Sijst. Nat. i. p. 488 ; Linti. Gm, p. 1314. 

 Lutjanus chrysopterus, Lacep. iv. pp. 186, 226. 

 Haemulon chrysopteron, Cuv. 8f Val. v. p. 240 ; Dekay, New York 

 Zool. iv. p. 85. pi 7. f. 22; Holhr. Ichth. S. Carol, p. 120. pi. 17. f. 1. 



^- tS;- ^' I- ^- ^^*' ^^- ^- transv. 6/13. 

 The height of the body is 3|- in the total length, the length of the 

 head 3| ; the diameter of the eye is 3^ in the length of the head, 

 and 1^ in that of the snout. The cleft of the mouth is wide, the 

 upper maxillary reaching nearly to :the vertical from the centre of 

 the eye. The praeoperculum with the posterior limb slightly emar- 

 ginate, and with rather stronger denticulations at the angle. The 

 dorsal fin notched ; spines slender, flexible ; the fourth longest, 2\ 



