122 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.85 



Genus HEMINODUS H. M. Smith 



HEMINODUS PHILIPPINUS H, M. Smith 



The type and other Philippine material examined. 

 Subfamily Peristediinae 



Type genus, Perhtedion. Both jaws toothless. 



Includes Peristedion., Satyrichthys, Nemapenstedioyi^ and Scalicus. 



Genus PERISTEDION Lacepede 



PERISTEDION AMBLYGENYS, new species 



Figure 58 



Depth 5% in body measured from snout tip inside rostral exten- 

 sions; head 3l^, width 1%. Snout 2^/4 in head; eye 4, 1% in snout, 

 little greater than interorbital ; maxillary extends 4^ to eye, length 

 3 in head ; mouth width 2% ; barbel 214, with 6 tufts of several small 

 filaments; anteriorly each side of mandibular sympliysis tuft of small 

 filaments and 4 tufts on inner edge of each ramus of lower jaw 

 anteriorly; mouth endentulous; interorbital 4% in head, deeply con- 

 cave. Gill rakers 4+19, lanceolate, 3 in eye, twice gill filaments. 



Pair of attenuated, long, flat, rostral extensions, long as snout, 

 rather narrow interspace 4^ width of either extensi(m; single, strong, 

 low, postero-supraorbital spine, keel extending back witli broad, ob- 

 tuse parietal angle and ends in large, strong, erect occipital spine; 

 postocular keel ends in blunt suprascapular spine ; opercie with pointed 

 spine forming long keel forward long as eye; keel of suborbital stay 

 with undulous edge though without any spines and simply obtuse 

 posteriorly. 



From above gill opening 35 + 1 bony lateral plates; 4 rows of 

 diminishing spiniferous plates on trunk; spines all large, strong, 

 erect and surfaces of plates rugose; hind pair of plates on belly 

 before vent 1% length of front pair; arc of 5 rather poorly developed 

 scutes from over gill opening downward. 



D. VIII, 20, third spine 3tV in l^ead, fourth ray 3 ; A. 22, eighth 

 ray 3%; caudal 3? (damaged) ; least depth of caudal peduncle 3iA 

 in eye; pectoral 2i'5 in head, rays i, ll-ii, upper detached ray 1% 

 in head or reaches base of fifth anal ray; ventral rays I, 5, fin 2 in 

 head or reaches vent; vent with papilla i/> of eye. 



Light brown, whitish below. Iris gray. Spinous dorsal with 

 blackish margin above and soft dorsal with black marginal line. 

 Pectoral whitish, with blackish terminally and transverse dark brown 

 band. 



