230 R. E. Lloyd : Marketable Fish from Akyab. [VOL. I. 



measured between the first and last spines (in L. delica- 

 iulus it is considerably less). 



3. The ends of the ventral fin just touch the first anal spine. 



4. The pectoral fin is as long as the head. 



5. Perhaps the most marked difference is in the teeth of the 



upper jaw. In examples of L. delicatulus I find that in 

 addition to two well-marked canines, the upper jaw has 

 a single series of small pointed teeth on the biting edge 

 of the premaxilla in its front half. Posteriorly these pass 

 into a wide band of minute villform teeth, at least ten 

 deep transversely, si uated on the inner side of the pre- 

 maxilla in its posterior half. Da}^ only mentions the front 

 or single series. In L. burmanicus, except for well- 

 marked canines, the anterior half of the premaxilla is 

 toothless, but on the inner side of this bone in its 

 posterior half there is a wide band of very minute teeth. 

 There are one or two minute teeth on the vomer, and a 

 small band of teeth on either palatine. In the lower jaw 

 there are 30 small teeth on either side and 3 canines close 

 to the symphysis. 



In all other points this species resembles L. delicatulus. 



The type of L. burmanicus is 14 inches ^ong, while Day says 

 that L. delicatulus attains a length of 10 inches and Cuvier and 

 Vallance one of 9 inches. The former species is said to be common 

 in the river and sea at Akyab throughout the year, and to grow to 

 1 6 inches long. 



