GNATHOLEPIS 133 



Volcanus, because a resident of the lake in which Taal Vol- 

 cano is located. 



56. GNATHOLEPIS DELTOIDES (Scale) 



Gobius deltoides SEALE, Occ. Papers Bishop Museum 1 (1901) 125; 

 JORDAN and SEALE, Proc. U. S. Nat. Mus. 28 (1905) 796. 



Dorsal VI, 1-11 ; anal I, 11 ; there are 28 scales in a longitu- 

 dinal series and }0 in a transverse series; 10 or 12 scales before 

 the first dorsal. 



The body elongate, compressed posteriorly, the depth in a 

 spawning female about 4 times in the length; the head 3.57 

 times in the length, with narrowed nape, the broad, blunt, 

 rounded snout 2.8 times in head and longer than eye, which is 

 3.5 times in head ; the eyes very high up, obliquely placed so that 

 they look up as well as laterally, close together, the interorbital 

 about 3 times in an eye diameter; the mouth small, terminal, 

 oblique, the jaws equal, the posterior angle of maxillary just 

 reaching a point below front margin of eye; in the upper jaw 

 the outer row has the teeth more widely spaced, with some com- 

 paratively large caniniform teeth in front; the other teeth 

 minute, in two rows anteriorly but only one posteriorly; in the 

 lower jaw three pairs of caniniform teeth in outer row, the 

 posterior ones stoutest and backward-curved, with an inner row 

 of teeth somewhat larger than those in upper jaw; the first 

 dorsal low, the tips of some of the spines slightly elongate, third 

 spine longest, 1.75 in head; the soft dorsal and anal angulate 

 posteriorly, the posterior portion longest and extending upon 

 caudal when depressed, the dorsal a little higher, its longest 

 ray 1.4 times in head; the round pointed caudal a trifle longer 

 than head, 3 times in length; the pointed pectoral is slightly 

 shorter than head and extends beyond tip of ventrals. 



The color in alcohol yellowish white, with six or seven red- 

 dish brown dorsal crossbars, alternating with blotches of like 

 color along sides ; on the upper part of eye a short black trans- 

 verse bar; below the pupil a small circular white spot beside 

 which a brownish black line begins and extends vertically 

 downward to a large brown spot on cheek ; from the lower edge 

 of this spot one line continues downward under head, and an- 

 other is directed obliquely forward and downward, the two thus 

 forming the Greek letter delta ; a dark brown diagonal line ex- 

 tends upward and backward across opercle, and a similar line 

 extends lengthwise on middle of pectoral base; the first dorsal 

 is marked, at least anteriorly, by three transverse rows of dark 



