1266 Catalogue of Malayan Fishes. [Dec. 



margin blackish ; anal silvery hyaline ; ventrals hyaline, rays of the 

 anterior half and the pectorals bright gamboge. Iris silvery, orbital 

 margin pale golden. 



D 18 or 19, C 19f, A 8 or 9, V 11, P 17 or 18. 



Br. left XIV, right XIII. 

 or „ XVI, „ XV. 



Habit. — Sea o/Pinang. 



Total length : 9f inch. 



The length of the head is 4£ in the total ; the depth at occiput 

 slightly exceeds half the length. The parietal protuberances and the 

 posterior keels of the frontal bones are sufficiently developed to make 

 the space between them appear hollowed ; the sutures of the frontal s 

 and parietals form an acute angle in front of the eye ; the frontals 

 are slightly convex ; the internal cavernous keels are sharp, so as to 

 deepen the narrow central groove. The nostrils open a little behind 

 the second half between the muzzle and the eye ; they are situated in 

 a small oval longitudinal groove, the upper and lower margins of which 

 are raised, so as to form sharp keels, the upper one of which rises on 

 the profile like a short arch, The eye occupies the middle of the side 

 of the head, bordering on the profile, which is slightly arched by the 

 lateral part of the frontal bone which forms the roof of the orbit. In 

 front of the anterior part of the orbital margin of the frontal appears 

 a narrow bone, analogous to the supraorbital of Cyprinoidce. The ho- 

 rizontal diameter of the eye is 4 \ in the length of the head, of which 

 the distance across the forehead is but \. The thick adipose fold 

 covering the eye has a vertically elliptical aperture corresponding to the 

 pupil which, however, is circular. In form the seven infraorbital bones 

 and the opercles resemble those of Alhula macrocephala, (Lacep.) 

 Between the cheek and the horizontal part of the preopercle appears a 

 single series of 7 to 9 scales, but little smaller than those of the body. 

 The tongue and teeth resemble those of the latter species. In 

 the adult there are no teeth on the upper maxillary bone, but in an 

 individual 8|- inch in length, four small pointed distant teeth appeared 

 along the margin of the left branch, and on the right two immediately 

 behind the intermaxillary, and one tooth close to the angle of the mouth. 

 A small accessorian maxillary appears at the posterior margin of each 

 branch. The thin narrow interopercle is arched, with the convex 



