232 



Key to the indo-australian species of the 

 genus Mugil. 



I. Upper lip not particularly thick ; gelatinous eyelid 

 well developed, covering at least a third of the iris 

 posteriorly. 

 A. Anal with 9 soft rays. 



1. L.I. 28 31. Maxillary visible. Snout equal to 

 or shorter than eye. First dorsal spine slightly 

 nearer base of caudal than to end of snout or 

 midway between them. Anterior half of anal 

 before second dorsal, the origin of which is oppo- 

 site to 1 8th 20th lateral scale. Pectorals shorter 



than head M. dussumieri p. 235. 



2. L.I. 3335- 



a. Maxillary visible. Snout equal to or longer 

 than eye. First dorsal spine in adult much 

 nearer to end of snout than to base of caudal. 

 First third of anal before origin of second dorsal, 

 the origin of which is opposite to 2ist 23rd 

 lateral scale. Pectorals much shorter than head. 



Least height of caudal peduncle 1 2 / 3 2 in head. M. tade p. 236. 



b. Maxillary hidden or nearly so when mouth is 

 closed. First dorsal spine about midway be- 

 tween end of snout and base of caudal. Least 

 height of caudal peduncle more than twice 

 in length of head. 



. Pectorals much shorter than head ; reaching 



to 8th Qth lateral scale. Caudal peduncle 



about 2/5 of length of head M. engeli p. 238. 



/3. Pectorals about equal to head, reaching to 



1 2th 1 3th lateral scale. Caudal peduncle 



about twice in head M. longimanus p. 239. 



3. L.I. 36 38; extremity of maxillary visible. First 

 dorsal spine nearer to end of snout than to 

 base of caudal. First third of anal before origin 

 of soft dorsal, the origin of which is opposite 

 to 22nd lateral scale. Pectorals not much or nearly 

 not shorter than head. Caudal peduncle about 



equal to postorbital part of head M. ophuyseni p. 240. 



4. L.I. 4043. First dorsal spine nearer to end of 

 snout than to base of caudal. First third of anal 

 before origin of soft dorsal, the origin of which 

 is opposite to 25th lateral scale. Maxillary visible. 



