1372 Catalogue of Malayan Fishes. [Dec. 



margin a similar, and between the two a pair of smaller ones ; single 

 ones also appear at the anterior and posterior margin of the orbit, and 

 a pair a little beneath the lower margin. The occipital crest is sur- 

 mounted by three spines, behind which rise five smaller ones forming 

 a cluster like a coronet. At the root of the pectorals appear two, and 

 a pair on each side of the throat. Over the opercles radiate some fine 

 lines. The body is heptagonal ; its greatest vertical diameter slightly 

 exceeds the length of the snout to the nostrils. The tail is quadran- 

 gular, tapering into a point. The anus is situated nearly in the middle 

 of the total length, opposite the posterior third of the dorsal. The 

 latter occupies the 10th and 11th ring of the body and the first caudal; 

 the length of the rays is 1| diameter of the orbit, the extent of the base 

 is contained about 3^ times in the length of the head. The pectorals 

 are a little shorter than the dorsal, and the anal is the shortest of all. 

 A single individual occurred at Pinang in August 1844. 



