30 gakgetic fishes. Order II. 



very minute bones. Each nostril has two apertures. The eyes 

 are situated high. The gi\\-cove?*s are scaly. The membrane 

 contains about five rays. 



The vent is behind the middle. Before the back fin are 

 about twenty distinct prickles ; before the anal fin there are 

 three. 



The back fin is arched, and contains about fifty-one rays. 

 The pectoral fins are low, and each contains twenty rays. 

 The anal fin is arched, and contains about forty-eight rays. 

 The tail fin is distinct from both back and anal fins, and contains 

 fourteen rays. 



- 

 3d Species. — Macrognathus pancalus. Plate XVII. Fig. 1. 



A macrognathus with the tail fin distinct ; and with many 

 black and white dots on the body. 



This is a beautiful fish, which is found in tanks, and grows 

 to from four to six inches in length. The colour above is green, 

 and below white, marked on the sides with many black dots 

 and small white spots. The hinder part of the back fin, and 

 those of the vent and tail, are brownish with many black dots, 

 forming transverse stripes. 



The jaws contain minute teeth. Each nostril has only one 

 aperture. The scales on the gill-covers are not visible. Each 

 of the membranes covering the gills contains four rays. 



The tail is sharp. The scales are very minute. The prickles 

 before the back fin are about twenty-five ; before the anal fin 

 they are three in number. 



The back fin is arched, and contains about forty rays. Each 

 pectoral fin contains twelve ; and the anal fin, which is arched, 

 has about twenty-five. 



