420 Mr. C. T. Regan on 
Syngnathide. 
Doryichthys millepunctatus, Kaup. 
Folohy, E. Madagascar. 
Centropomide. 
Ambassis commersonii, Cuv. & Val. 
Folohy and Ambilo, E. Madagascar. 
Liognathide. 
Gerres filamentosus, Cuv. & Val. 
Ambilo (lagoons). 
Gerres methuent, sp. n. 
Depth of body 23 in the length, length of head 3 to 3}. 
Snout as long as or a little shorter than diameter of eye, 
which is 8 to 34 in the length of head and nearly equal to 
the interorbital width. Maxillary extending to below anterior 
1 of eye; 3 or 4 series of scales on cheek ; 7 or 8 gill-rakers 
on lower part of anterior arch. 44 scales in a longitudinal 
series, 5 beteen lateral line and scaly sheath at base of spinous 
dorsal, 12 or 13 below lateral line, 7 or 8 from base of pectoral 
to middle of chest. Dorsal X 9; third spine nearly as long 
as or a little longer than second, 4 to 2 length of head. 
Anal III 7; second spine a little longer than third, ? to $ 
length of head. Pectoral longer than head, nearly or quite 
reaching origin of anal. Caudal widely forked. Caudal 
peduncle as long as or a little longer than deep. Dark 
longitudinal stripes along the series of scales. 
Three specimens, 100 to 140 mm. in total length, from 
Folohy-and lagoons at Ambilo, H. Madagascar. 
This species is distinguished from Gerres lineolatus, Giinth., 
by the deeper form and the shorter second dorsal spine. 
Liognathus dussumieri, Cuv. & Val. 
Ambilo (lagoons) and Folohy. 
Monodactylide. 
Monodactylus argenteus, Linn. 
Ambilo (lagoons). 
