62 PERCII)^. 



conspicuous. Ground-coloiu- whitish, minutely and densely dotted 

 with black ; dots crowded in the middle of the scales in the shape of 

 a central blotch. 



Rio de Maypo, Chili. 



The two following species are too little known to be brought 

 into this genus ^yith certainty ; but being evidently good species, I 

 think it better to place them here than to neglect them. 



4. Percichthys ciliata. 



Perca ciliata (Kuhl i^ v. Hasselt), Cuv. Sf Val ii. p. 52. 



Height of the body not quite one-fom-th of the total length. Scales 

 strongly ciliated. Above imifomi greenish ; no black spot on the 

 dorsal fin. 



Java. 



5. Percichthys marginata. 



Perca marginata. Cm: i,- Val. ii. p. o-j. 



Height of the body one-fourth of the total length ; edge of oper- 

 culum entire ; edges of prjeoperculum equally and finely denticu- 

 lated ; caudal fin forked, black-edged. 



Hob. ? 



3. PARALABRAX. 



Paralabrax, Girard, Proc. Ac. Nat. Sc. Philad. 1856, p. 131. 



Habit cylindrical. Six branchiostegals. Pseudobranchiae ? Teeth 

 villiform, with a seiies of larger ones on each side of the jaws ; teeth 

 on the palatines, tongue smooth. One dorsal, deeply notched, the 

 first portion with nine spines ; the anal fin with three. Operculum 

 spiniferons ; praeoperciilum seiTated. Scales small. 



Fresh waters of California. 



1 . Paralabrax nebulifer. 



Labrax nebulifer, Girard, Proc. Ac. Nat. Sc, Philad. 1854, p. 142. 

 Paralabrax nebulifer, Girard, I. c. 1856, p. 131. 



D.9|l. A.I-. 



Total length not quite four times the height of the body ; lateral 

 line ? ; thii'd dorsal spine longest. Back reddish brown, with large 

 cloud-like blackish blotches ; snout covered wth small roundish 

 spots ; a dark band from the orbit across the cheeks to the gills. 



Monterey (California). 



