[7] 



REVIEW OF THE LABROID FISHES. 605 



cc. Teeth iu both jaws in three or four series, all imbricated iu quincunx order on 

 the dental plate, to which they are adnate by the posterior face ; cutting 



edge of both jaws formed by the teeth Calotomus, 26. 



bb. Dorsal spines stiff, pungent ; teeth of upper jaw at least more or less coalescent. 

 d. Teeth of lower jaw distinct, disposed iu oblique series. .Callyodontichtiiys. 

 dd. Teeth of both jaws chiefly coalescent, the jaws divided by a rather indis- 

 tinct median suture Sparisoma, 27. 



aa. Lower pharyngeal spoon-shaped, much longer than broad ; teeth of jaws fully 

 coalesced; each jaw divided by a distinct median suture; gill-membranes 

 forming a fold across the isthmus; dorsal spines flexible; lateral line in- 

 terrupted behind, beginning again lower down on the peduncle of the tail ; 

 scales about head rather numerous, those ou cheeks in two or more series; 

 lower jaw included Scarus, 28. 



# 



Genus L— CENTROLABRUS. 



Centrolabrus Giinther, Cat. Fish. Brit. Mus., iv, 92, 1862 (exoletus). 



Type : Labrus exoletus L. 



Etymology : Kivrpov spine ; Labrus, an allied genus. 



This genus contains two or three species, found on the coasts of 

 Europe, one of them ranging farther to the north than any other La- 

 broid fish. 



ANALYSIS OF SPECIES OF CENTROLABRUS. % 



a. [Dorsal rays XVIII to XX, 6. Anal rays V, 7 or 8; body rather robust ; the snout 

 of moderate length, about 3£ in head; mouth very small, its cleft reaching 

 barely half way to front of eye; eye rather large; dorsal spines low, the soft 

 rays somewhat higher, but lower than the anal; caudal rounded. Head 3£ in 

 length ; depth 3£ ; scales = 3-33-10, three rows ou cheeks; color rich brown, 

 the sides shaded with yellow ; narrow yellow lines along the rows of scales ; 

 a dark spot on eye, above ; two blue bands from eye to angle of mouth, and 

 two more across preopercle ; no black spot behind eye ; a dull bluish mark on 

 opercle ; fins yellowish-silvery ; a line of dark marks along spinous dorsal ; 

 caudal with a black base and a white outer margin.] (Day) Exoletus, 1. 



aa. [Dorsal rays XVI or XVII, 8 or 9; Anal rays IV, 9, or V, 8; teeth equal, close- 

 set ; a dull spot behind the orbit ; sometimes a spot at the root of the caudal 

 fin ; coloration dark green, back with interrupted cross-bars, sides sometimes 

 with indistinct darker longitudinal streaks ; depth 3^ in length. D. XVII, 8. 

 A. IV, 9, orV, 8. Scales 3-34-11.] (Giinther) Trutta, 2. 



1. CENTROLABRUS EXOLETUS. 



(Rock Cook.) 



Labrus exoletus Linmeus, Syst. Nat. Ed. x, 1758, 274. (Atlantic Ocean.) Ed. xii, 

 479. Fabricius, Fauna Groulandica, 1780, 166. (Greenland) (and of the early 

 writers). 



Acantholabrus exoletus Cuv. & Val., xiii, 247 (copied) ; Collett, Norges Fiske, 94 (and 

 of several authors). 



Centrolabrus exoletus Giinther, iv, 92; Day, Fish. Gt. BritaiD, 267. 



Labrus pentacan thus Lacepede, Hist. Nat. Poiss.,iii, 503, 1803 (after Linnaeus). 



Orenilabrus microstoma (Couch) Thompson, " Proc. Zool. Sjc. London, 1837, 55." 



