NEW PHILIPPINE FISHES — FOWLER 125 



Differs from Nemaperifitedion orientale in its narrower and less ex- 

 panded head, longer and slenderer rostral extensions with a broader 

 interspace, the absence of an inner or upper spine at the preopercular 

 angle, the presence of a prebasal external small spine to the preopercu- 

 lar opposite the front vertical border of the preopercle, greatly shorter 

 mandibular barbel with fewer filaments, fewer mental filaments and 

 none along inner edges of chin externally, and in the presence of a 

 minute frontal spine on the snout before the eye. 



(clavls, key + la pis, stone; with reference to the contour of the head 

 as viewed above suggestive of the outline of a keystone.) 



SATYRICHTHYS PIERCEI, new species 

 FiGUBE 60 



Depth 434 in length measured from snout tip inside rostral ex- 

 tensions ; head 214, width 1%. Snout 2 in head ; eye 4%, 21/3 in snout, 

 equals interorbital ; maxillary extends % to eye, length 21/0 in head; 

 mouth width 21/5; barbel 2i/4, with 8 pairs of filaments; pair of 

 rather long lower mental filaments each side of mandibular symphy- 

 sis, and outer with small accessory filament; along front part of 

 inner edge of each mandibular ramus 3 short filaments; no teeth; 

 interorbital 434, deeply convex. Gill rakers 6 + 17, length 31/5 in 

 eye or twice gill filaments. 



Pair of flat, thin, triangular, rostral extensions, long as eye, basal 

 width of each equal to % of interspace ; pair of small, erect, wide-set 

 postnasal spines, little behind posterior nostrils or at first third in 

 snout ; single larger spine medially at last third in snout ; single and 

 rather large postero-supraorbital spine each side, keel posteriorly 

 leading to large, strong, erect occipital spine, 21/3 in eye; postocular 

 keel ends in small, inconspicuous bhint end, scarcely a suprascap- 

 ular spine; opercular spine slender, about level with lower edge of 

 eye, with forward keel so its length nearly equals eye ; ridge of sub- 

 orbital stay trenchant, moderate, with finely serrate or denticulate 

 edge, ending in long slender spine at angle of preopercle 11/5 times 

 eye and with short prebasal denticle externally, also preopercular 

 spine reaching 14 in pectoral fin. 



From above gill opening 28 + 1 bony lateral plates; 4 rows of 

 diminishing spiniferous plates on trunk and tail ; spines all triangu- 

 lar, rather small, firm, sharply pointed and surfaces rugose striate; 

 hind pair of plates on belly before vent 1% in front pair; arc of 5 

 small plates over and behind gill opening. 



D. VII, 16, third spine 4i/8 in head, fourth ray 3% ; A. 16, fourth 

 ray 4; caudal 2i/4, little concave behind; least depth of caudal pe- 

 duncle 2% in eye ; pectoral 2% in head, rays i, 12, i-ii, reaches oppo- 



