PHILIPPINE MACROUROID FISHES—GILBERT AND HUBBS. 441 
spreads out. The region immediately around the base of the first 
dorsal, the axillary region of the pectoral, and the dorsal spine, are 
all black; the ventrals are sometimes blackish near their bases, and 
near the tips of their rays; elsewhere the fins are light dusky. 
C. quincunciatus differs quite widely from C’.. argentatus, although 
the two species obviously belong to the same group. The scales are 
larger in guincunciatus, being in but four, instead of five or six, rows 
between the lateral line series and the origin of the second dorsal 
fin; the underside of the head is completely scaled, instead of being 
wholly scaleless, except for a definite small anterolateral patch; the 
anterolateral region of the snout above is almost wholly scaled, in- 
stead of being mostly naked; the spinules on the scales of the head 
are weaker; the gular membrane is punctate, rather than trans- 
versely striate; the anus is located farther forward, its distance 
from the ventral fin being contained 2.4 to 3.2 times in the head 
(rather than from 1.8 to 2.3 times) ; its distance from the isthmus is 
contained from 1.32 to 1.6 times in the head (rather than from 1.15 
to 1.32 times); the barbel is usually longer, being contained from 
2.3 to 3.0, instead of from 2.6 to 4.2 times in the postorbital; the snout 
is usually longer, its preoral length being contained 2.3 to 2.55 times 
in the length of the head, instead of from 2.4 to 2.8 times. C. guin- 
cunciatus appears to be intermediate in its relationships between the 
preceding species, C. argentatus, and the one next to be described, 
C. thompsoni. An analysis of the three species is given in the key, 
and another after the description of C. thompsoni. Of the three 
forms, C. argentatus apparently attains the largest size. 
Table of measurements in hundredths of length to anus. 
Type. Paratypes. 
PANU GLOSS Sta OW ee eee one et en ee 5392 5121 5121 5396 5412 5497 
otalulengihy imemMimMy = fae Secs see ene 1 237 225 194 1 182 1188 147 
Length tovdnus in’mm2.22.2-.22.2.-.2-2. 93. 3 77 68 72 70. 5 50 
Meng throisheadsen. ston ce Mtenaee ine ocean 71 71 68 72 73 76 5 
ene ibnote Orbiter: ssaeccee see oe een ee eee 16 17 18 19 18 21 
Postorbital length of head..............-.. 26. 5 24 24 26 26.5 26 
IMWidthrofumterorbitall ss s22)-- ees 16.5 18 18.5 18 17D 20 
Widthiofesuborbital: 52.5 222-252 22 Se5 22 8 9 8 8 9.5 9.5 
ORDIT WO sPLEOPerCles nics 2 ice see eee eee 28 27 26 28 28 | 29 
HWene thoi snolitiee slo. =k sao ak Soe eee 30 30.5 31 29 31 32 
Wenethofupper jaws. +222 22s eee 21.5 22 20.5 21 20 21.5 
WepenvO body ste< yess. cies -ceeeeee 34 37 38 35 34 37 
WAG GIOL DOU ae cats sas = 2s 2c eee 24 27 DON | ae Peeks PBS || 20 
Anus to ventral....... Be a SS od pee 30 28 28 24 26 26 
Wentralto wihimus e212. 10000028 gee 26 923 | 26 25 | 26 
Length of first dorsal base................ 15 14 14 i835) ile ets) 15 
Length of interdorsal space..........._... 18 15 16 15 18 12.5 
ens thvorssecond dorsallspine: eee Ce Me el i OA Ao lease ee ae 33 
Menpihvorpectoraltitia: sos. 0 02. A Eee en DTG et etek ays, ay area he 28 31 
Length of outer ventrai ray..:............ Ta ey Pearse | Sener Ie RUE UN Me ee Ce a eee 
1A pseudocaudal developed. 
(quincunciatus, in reference to the quincunx arrangement of the 
spinules on the scales.) 
