FISHES S YNGNATIDAE SYNGNATHUS ARUNDINACEUS. 



347 



This species has the general appearance of the preceding one, and the specimen referred to 

 being of the same length, a comparison between the two species is thus made most thorough, 

 and would be still more so had we before us the same sexes. 



There are eighteen plates anterior to the vent, and forty-three posterior to it. The head 

 constitutes the seventh of the total length. The posterior margin of the dorsal fin is equidistant 

 between the apex of the snout and the extremity of the caudal fin. 



The length of the sub-caudal pouch is equal to the distance between the vent and the apex of 

 the snout. 



D 34 ; A ; C 1, 4, 4, 1 ; V ; P 11 or 12. 



The color is blackish brown ; the lower part of the flanks and the belly being maculated with 

 golden yellow. The sides of the head exhibit likewise yellowish streaks. 



List of specimens. 



