GLOSSOGOBIIJS 157 



Glossogobius aglestes JORDAN and SEALE, Proc. U. S. Nat. Mus. 28 

 (1905) 798, fig. 16. 



Bicol name, mulug; Tagalog, biang tulog (sleeping goby). 



Dorsal VI, 1-9, rarely 8; anal I, 8; there are from 28 to 30 

 scales in a longitudinal row, 9 in a transverse series, and from 

 14 to 17 before the first dorsal. 



The depth contained 5.2 to 6 times, the head 3 to 3.3 times 

 in length; the eyes dorsolateral in position, very close together, 

 and from upper margin of iris of each eye a circular extension 

 projects into pupil, as shown in the figure; the eyes contained 4.4 

 to more than 5 times in head and 1.2 to 1.5 times in the rather 

 sharp-pointed snout, which goes 3 to 3f times in head; the 

 distance from tip of snout to posterior margin of eye less than 

 or rarely equal to the postorbital part of head; the lower 

 jaw strongly projecting, the mouth large, with the maxillary 

 extended to below rear margin of eye, or rarely only to below 

 center of pupil; the teeth similar to those of other Philippine 

 species, but the outer and inner rows larger proportionately 

 than in G. giwrus; except rarely, the naked interorbital space 

 does not extend posteriorly beyond rear margin of eyes, and 

 has a prominent anterior interorbital pore and a less conspicu- 

 ous posterior one; occasionally a very narrow or linear naked 

 space is behind eyes ; the head entirely naked except for a par- 

 tial or complete row of rather large scales along upper margin 

 of opercle; the longitudinal rows of papillae, so conspicuous on 

 preopercle of most species of this genus, are but little evident 

 and are either reduced in number and size or are absent. 



The color of alcoholic specimens varies from yellowish brown 

 to dusky gray or blackish ; in some there are five broad crossbars 

 of dark brown over the back and down the sides; pupil of eye 

 white with a black circular extension from iris into it on upper 

 side; the first dorsal usually dark brown; on the upper part 

 is a very dark or black elongate spot between first and second 

 spines and a rounded black spot between fifth and sixth spines ; 

 it may have a very broad red band above and before it; across 

 the front half just beneath the first spot is a broad irregular 

 white bar, with usually one or two narrower white bars near 

 base; the other fins brown to blackish, more or less marked by 

 crossrows of alternate pale and dark spots; many specimens 

 have the lower side of head marked by rather large white spots, 

 forming the species Glossogobius aglestes Jordan and Scale; 

 sometimes specimens have small, circular, dark brown or black 

 spots sprinkled over the top of the head. 



