A COLLECTION OF FISHES FROM SUMATRA. 517 



Scales all fallen and hardly a trace of lateral line. Pockets on chest and breast 

 indicate that it was scaled. Bases of spinous dorsal and anal with a scaly sheath. 

 Two conical processes on chest with a groove between, and a low keel forward from 

 base of each ventral, space between narrow. 



Spinous dorsal inserted a little behind origin of jjectoral, second spine enlarged 

 and longest. Second anal spine largest, and origin of fin a little nearer tip of snout 

 than base of caudal. Caudal deeply forked, and lobes rather broad. Pectoral 

 reaching at least opposite base of second anal spine. Ventral small, inserted below 

 origin of pectoral, and reaching two-thirds of distance to anal. 



Color in arrack with upper half of body plain pale brownish-gray, lower half 

 white. Body everywhere more or less bright silver3\ Back with several rows of 

 brownish blotches, two or three blotches to a row, and line of demarcation distinct. 

 Fins dilute brown or whitish, spinous dorsal black on membranes of upper half 

 Inner base of pectoral dark brown. Iris whitish. 



Length 1^ inches. 



Type No. 27,529, A. N. S. P. Padang. 



One example. This may prove to be the young of Leiogtiathus blochii (Valen- 

 ciennes). An indistinct brown saddle-like blotch in front of spinous dorsal on the 

 back. Day's description and figure of Equula blochii differ in the posterior dark- 

 colored base of pectoral.^ 



(;%r\Xoiro<i, spotted.) 



Subgenus LEIOGNATHUS Lac6p^de. 



Differs from Equnliles in naked breast and chest. 



89. Leiognathus edentulus (Bloch). 



DEVEXIMENTUM gen. nov. 

 Type Zeus insidiator Bloch. 



This genus diifers from Leiognathus in the nearly vertical mandible, so that 

 the mouth is pi'otractile horizontally. 



{Devexum, hanging, or declining down; menlum, chin.) 



90. DEVEXIMENTUM INSIDl.\TOR (Bloch). 



91. Gazza. TAPEINOSOMA (Bleaker). Plate XV, upper figure to right. 



92. Gazza minuta (Bloch). 



93. Pentaprion longimanus (Cantor). 



MENID^. 



94. Mene maculata (Schneider). 



LACTARIID.iE. 



Body oblong, compressed. Head compressed, with Percoidean aspect. Snout 

 conic. Eyes lateral. Mouth cleft deep and oblique. Teeth small in the jaws, with 

 one or two pairs of canines in front. Margin of preopercle entire. Gill-opening 

 large. Gill-rakers long. No processes on the shoulder girdle inside the gill-opening. 

 Branchiostegals seven. Pseudobranchia^ present. Peritoneum pale. Scales of 

 moderate size, cycloid, and extending partially over the fins. Lateral line continu. 



1 Fishes of India, II, 1876, p. 241, plate 52, fig. 5. 



