PHILIPPINE MACROUROID FISHES—GILBERT AND HUBBS. 437 
both types are sometimes found together on the gular membrane 
(see descriptions of the species of Hymenocephalus). The surface 
over the pectoral girdle, where covered by the gill covers, is largely 
silvery, but'is dark in front of the pectoral fin. The lining of 
the buccal cavity, in strong contrast to its color in most species, 
is whitish; the lining of the branchial cavity is whitish over the 
hyoid arch, but brown elsewhere, shading to black just within the 
abrupt and narrow white margin along the branchiostegal and 
opercular membranes. _The parietal peritoneum is for the most 
part dark purplish brown, underlain with silvery, but is whitish 
along each side of the ridge formed by the organ already described. 
The opercles show silvery and bronzy reflections. The region of 
the occiput is blackish. The eye-ball is blackish dorsally, silvery 
ventrally; the pupil is surrounded by a very narrow silvery ring; 
the iris is more or less yellowish, but without a well-defined yellow 
ring as in @. (Abyssicola) macrochir. The bases of the first dorsal 
and the paired fins are blackish, as are also the tips of the ventral 
rays. 
In the larger specimens the striking silvery color of the sides 
is bounded above by a dark streak along the tail. 
In a young specimen, measuring only 24 mm. to the anus, the 
abdomen is whitish, excepting the dark streak along the mid-ventral 
line; the branchiostegal membranes are light, with dark specks; 
the gular membrane is light brown, without the dark transverse 
streaks (these are already apparent in a specimen 32 mm. long 
to the anus); and the fins lack their blackish bases. Small speci- 
mens differ also in their proportions from larger ones, as the fol- 
lowing table shows. 
Table of measurements in hundredths of length to anus. 
{ 
® Type. 
AN DOLLOSS SUAULOM. aot ose eae So ae eee wot le ae esl pate 5118 5135 | 5545 
Motalens pow mamas aes eet 4. ee pee | BRL taal Ie aeeeeerete ecatercac 
eH e UN EOMANUS aI Mines eee te ey sone a : 92 66. 6 24 
WWenetinvo fh en decree som tects eters onan ys ae yay ene : j 675 Gis! 71 
WETS UNMOMOnDLL Eee see eee es ek et a ee ee : | 17 17.3 | 22 
Length of posterbital..............-. Ese cee ae osioe : 24.5 23° | 24 
Waothyofinterorbital. Sales ashe eee ‘ : ily 16 20 
WadTOnSubonbiteleac.. i: ie reel are ta see cer ; ay 8 7.3 | 9 
Orbit to preopercle.......... 35. A ep ee See ; 13 | 27 28 | 27 
ena GUSMOULs = sh. =. she eae CR ee ae Oe : 27.2 27.2) 27.5 
enethvotmeaxillany ste ee Mo ue ese ne | Aan ee ce 6 | 21 20.6 22 
Wepthtommodyees eels ee ese sccm Seo LE ee aoe : Dana 37 32 33 
Wadthrofibodiyessssaef 31.3 ye5 se bk E 4 | 26 23.3 | 23 
FATT SHU ONVO DUA ooo rate ose ae bie ae ae 3 | 34 34 32 
Wentraltionsthimus $35 35985 4a. 23.3 23 24 
Length of first dorsa! base...........- : 13.3 123 14 
Length of interdorsal space 18 18.6 17 
Eength of pectoral fines: 22.22. 2:-..2.-2 26 26 29 
Menethy Oomtersventral rays... aise cs uc cos wee Sloe mae hee 23.5 22 2One ase eaten 
Weneth olsecondaventralray,a. oncis. osesecewecee = talceosceoeee 17.6 | 17 SOP a See sae stos< 
aatO, 
1 A pseudocaudal developed. 
(argentatus, in reference to the silvery coloration.) 
