256 GOBIOID.E. 



it and the two Gobies that have hitherto been considered 

 as our only indigenous species ; I have also received it from 

 Holyhead and Cornwall : I have taken it myself on the 

 coast of Dorsetshire, and have had specimens sent me from 

 Berwick bay by the kindness of Dr. Johnston. I am not 

 aware of any peculiarity in its habits that would distinguish 

 it from the other Gobies, but I have never met with it in 

 fresh water. 



The length of the specimen now described Avas two inches 

 and one-eighth ; the upper part of the head and nape flat- 

 tened ; the eyes large, placed laterally ; the mouth large, 

 the line of the gape slanting obliquely upwards, the angle 

 depressed, the lower jaw much the longest when the mouth 

 is opened ; both jaws furnished with numerous slender, 

 sharp teeth, curving inwards. 



The number of fin-rays are as follows : — 



D. 7. 12 : p. 15 : V. 12 : A. 12 : C. 11. 



The first dorsal fin commences a little in advance, on 

 a vertical line, of a conspicuous dark spot on the side just 

 behind the origin of the pectoral fin ; the second dorsal fin 

 commences in a line over the vent : all the rays of both dorsal 

 fins are slender and flexible. The pectoral fin large, and when 

 spread covers, but from the transparency of the fin-mem- 

 brane does not entirely conceal, the dark spot on the side 

 before referred to : the ventral fins, arising a little behind 

 the origin of the pectorals, are united, the longest rays 

 extending considerably beyond those of the pectoral fins. 

 The vent with its tubercle are in a line under the commence- 

 ment of the second dorsal fin ; the rays of the anal fin possess 

 the same slender, flexible character as those of the dorsal ; 

 the tail nearly square, with a conspicuous dark spot at the 

 base of the caudal ravs. 



