6, GLTPHIDODON. 53 



along the middle of the nape and of the forehead ; another from the 

 origin of the lateral line through the eye to the snout, where it meets 

 that of the other side ; two other similar but less distinct streaks 

 further below ; the lower side of the head brownish (yellow in hfe) ; 

 dorsal and anal bluish ; a round black spot occupies, if present, the 

 base of the fifth and of some of the following rays. 



Var. a. The black dorsal spot is present, and the caudal fin is blue. 



Var. /3. The black dorsal spot is present, and the caudal fin is 

 yeUow. 



Var. y. The black dorsal spot is absent, and the caudal fin is blue. 



Coasts of Batjan, Amboyna, Goram, Borneo, and of the Philippine 

 Islands, 



a. Fine specimen. Borneo. Purchased of Mr. Frank. (Var. /3.) 



b. Fine specimen. Philippine Islands. Purchased of Mr. Cuming. 



(Var. y.) 

 c~d. Half-grown. Indian Seas. (Var. /3.) 



This species is very distinct from Q. uniocellatus of Quoy & Gaimard, 

 which has the black dorsal spot " pres de la base et de la fin de la 

 dorsale," whilst it is situated more anteriorly in this species. The 

 variety without the black dorsal spot agrees so closely with 0. assi- 

 milis, that it is certainly not specifically distinct from it. I am, how- 

 ever, not as certain whether specimens of this variety have not been 

 described as G. azureus, Quoy & Gaim. ; yet none of the French 

 naturalists mention th« bands on the head, and therefore I have pre- 

 ferred to describe the present species under a separate denomination. 



41. Glyphidodon azureus. 



Quoy Sr Gaim. Voij. Uran. Zool. p. 392. pi. 64. fig. 3 ; Cuv. 8f Val. v. 

 p. 479. 



The height of the body is one-third of the total length (the caudal 

 fin included). Caudal fin rounded. Uniform blue, fins yellowish. 

 Timor ; Friendly Islands. 



42. Gljrphidodon dispar. 



D. i|. A. ^. L. lat. 25. L. transv. 2/8. 



The height of the body is contained twice and a third in the total 

 length, the length of the head thrice and a half. The diameter of 

 the eye is nearly two-sevenths of the length of the head, somewhat 

 longer than the snout, and equal to the width of the interorbital space, 

 which is convex. The width of the proeorbital is one-half of that of 

 the orbit. Praeorbital and pra;opercular Hmb naked ; scales on the 

 cheek in two series. Teeth narrow, not emarginate, about forty in 

 each jaw. The middle and posterior dorsal spines are nearly equal 

 in length ; the soft parts of the vertical fins not prolonged, slightly 

 rounded ; caudal somewhat emarginate, two-ninths of the total length. 



