PHILIPPINE MACROUROID FISHES — GILBERT AND HUBBS. 413 



The first dorsal spine is sharp but short, the length of its external 

 portion being one-seventh that of the orbit ; its root is composed of 

 two posterior condyles separated anteriorly by a socket, from which 

 a foramen passes backward between the condyles; the exposed por- 

 tion is of pyramidal form, with grooves between the four sharp 

 angles. The first dorsal spine appears to be more than a rudiment : 

 it probably serves as a support for the strong denticulated second 

 spine. The heavy basal half of the second spine is triangular in 

 cross-section, with the sides grooved; the sharp anterior keel bears 

 24 (20 or 30) strong spinules, becoming longer and more slender 

 upwards, and confined to the basal 0.6 of the spine. The spine be- 

 comes very slender distally, and exceeds the length of the head by 

 a distance contained 5.2 (2.4, 2.9) times in the head; the third ray 

 is contained 1.1 (to 1.5) times in the head ; all the soft rays of the first 

 dorsal except the last two are branched in their distal half. The rays 

 of the second dorsal are rudimentary anteriorly, and can not be 

 traced so far forward in the type as in the paratype, the interdorsal 

 space being 2.3 times the base of the first dorsal in the type, and 

 1.3 times that distance in the two paratypes. The pectoral fin is not 

 produced, its length being contained 1.7 times in the head (1.4 times 

 in a paratype) ; its fifth ray is longest. Ventral with 8 rays, the 

 outer one filamentous and nearly as long as the head, reaching back- 

 ward to the ninth anal ray; ventral inserted slightly behind the 

 pectoral, but anterior to the dorsal. 



The ground color is dusky brownish, becoming darker on the belly 

 and on the head, particularly toward the snout; the sides of the 

 belly and of the head are underlain with a silvery pigment; the 

 lips, nasal fossa, and upper half of branchiostegal membranes are 

 blackish. The fins are all blackish, with a little grayish pigment 

 basally, overlying the darker shade. The base of the anal has a 

 narrow whitish, punctulate streak. Lining of buccal cavity bluish 

 black; of branchial cavity, brown, shading into black toward 

 branchial aperture; parietal peritoneum dusky brown. 



G . semiscabev belongs to a rather well-marked group of species 

 which agree in possessing a produced dorsal spine, a deep and 

 sharply compressed body, and a dorsal contour horizontal behind 

 the first dorsal fin. It differs from all the other species of the group 

 in the lower dorsal spine, and in numerous other details: from C. 

 marginatum, 1 the Japanese representative, in the much darker color, 

 less regular arrangement of the spinules on the scales, blunter head, 

 more numerous serrations of the dorsal spine, etc. ; from C. microps, 

 in the more numerous ventral rays ; much darker color ; more nuraer- 



1 For description and synonomy see Gilbert and Hubbs, Proc. U. S. Nat. Mus., vol. 51, 

 1916, p. 164. 



