GOBIUS 109 



Gobius interstinctus RICHARDSON, Voy. Erebus and Terror, Ichthyology 



(1844-1848) 3, pi. 5, figs. 3-6. 

 Gobius periophthalmoides BLEEKER, Nat. Tijd. Ned. Ind. 1 (1851) 249. 



Dorsal VI, 1-10 or 11; anal I, 8 or 9; there are 26 to 28 

 scales in a longitudinal series, 9 in a transverse series, and 10 

 or 12 before the first dorsal. 



The robust body full and rounded or wedge-shaped anteriorly, 

 the posterior part much compressed laterally, the depth 4.6 

 times in the length; the head large, broad, pointed anteriorly, 

 3.4 to 3.6 times in length ; the breadth of head 1.3 to 1.5 times 

 in its length and a little more (about 10 to 12 per cent) than 

 its depth; the snout long, convex, 3.1 times in head; the eyes 

 very high up and close together, laterodorsal in position, 1.3 

 to 1.4 times in snout and 4.2 to 4.4 in head; the interorbital 

 contained 2.5 times in eye; the mouth inferior, with projecting 

 upper jaw and protractile upper lip, the thick fleshy lips fringed 

 on inner side, and the posterior angle of maxillary extending 

 beneath anterior part of eye or even beneath pupil; the teeth 

 all depressible, the outer row in each jaw enlarged and widely 

 spaced, followed by three rows of very small teeth; the body 

 covered with firm ctenoid scales, which are a little smaller 

 anteriorly, those on nape still smaller, extending to eyes and 

 curving a little forward between them; the remainder of head 

 naked; the base of pectoral and breast completely scaled; two 

 interorbital pores, three on the conspicuous supraopercular 

 groove, and three large pores on posterior margin of preopercle ; 

 the first dorsal low, 1.4 times in depth, well separated from 

 second dorsal and scarcely or not at all reaching it when de- 

 pressed; the second dorsal increases in length posteriorly, the 

 last ray reaching caudal when depressed, its length 0.875 of 

 or slightly exceeding depth; the anal base shorter than that of 

 second dorsal, the fin similar in shape to second dorsal but a 

 trifle lower, the last ray not reaching caudal when depressed; 

 the caudal rounded, shorter or longer than head; the pectoral 

 round pointed, a little longer or shorter than caudal but always 

 less than head, its tip over anal papilla; the ventrals broad, 

 with a deep cup formed by the broad frenum, or \ shorter 

 than pectoral and not extending beyond anus; the anal papilla 

 slender, pointed, leaflike in males, broader and thicker in 

 females. 



The ground color of alcoholic specimens varies from whitish 

 to very pale brown, with many longitudinal rows of brown or 

 blackish spots and pearl white dots or spots; on lower half 



