PHILIPPINE MACROUROID FISHES GILBERT AND HUBBS. 415 



Snout, 3.4 to 3.5 in head, longer than the orbit, the greatest 

 length of which is contained from 4.0 to 4.2 times in the head. The 

 interorbital is subject to considerable variation, as in G. semi- 

 scaber, its least width being contained 4.1 to 5.5 times in the head. 

 The least suborbital width is half the length of the orbit. The 

 mouth is somewhat oblique; the maxillary extends from below the 

 lateral rostral tubercle to the vertical passing through the center 

 of the orbit; length of upper jaw, 3.3 to 3.4. The teeth in both jaws 

 are in moderate villiform bands; the teeth in the outer premaxil- 

 lary series are somewhat heavier and more widely spaced than those 

 in the remainder of the band. Barbel variable in strength, 2.4 to 

 3.9 in orbit. The gill-membranes are united, without a free fold. 

 Six branchiostegals. The slit before the first gill-arch is greatly 

 reduced, being contained only 4.0 to 4.5 times in the orbit. Eight 

 rows of scales separate the origin of second dorsal from the lateral 

 line scales ; somewhat farther back a ninth row is inserted along the 

 dorsal base; there are six or seven rows between the last ray of 

 the first dorsal and the lateral line. The scales are smaller on the 

 bell} 7 , and on the head with the exception of the opercular region. 

 The gular and branchiostegal membranes, and the shoulder girdle 

 beneath the opercles, are wholly devoid of scales. The spinules 

 on the scales are not so definite in their arrangement as in 0. semi- 

 scabe?'/ a quincunx order can be made out on most of them; the 

 spinules are aligned in about 15 series which converge more or 

 less rapidly toward the apex of the scale; the spinules are of sub- 

 equal size and conic form; the last one projects beyond the 

 margin of the scale. The terminal rostral tubercle is rather small, 

 and is armed with conic spinules of moderate strength, and not 

 definitely arranged in series; the lateral tubercles are weak but 

 distinct. 



Ten pyloric caeca, about as long as the orbit, were counted in 

 one specimen. The anus lies immediately in advance of the anal 

 fin. The distance between the base of the outer ventral ray and 

 the center of the anus is equal to, or greater than, the postorbital 

 length of the head; the distance between the ventral fin and the 

 isthmus is only 0.7 to 0.8 the postorbital length of the head. 



The first dorsal spine is short and slender; the second spine is 

 produced into a strong, compressed, and exceedingly long filament; 

 the entire length of the spine is much greater than the length to 

 the anus, being considerably more than half the length of the fish 

 (except in the largest specimen) ; the anterior keel of the spine 

 bears only 11 or 12 denticulations of moderate strength, confined 

 to a basal portion of the spine contained 7.4 times in its entire 

 length, and 2.5 to 3.0 times in the head; the length of the head is 

 119404—20 4 



