504 GOBIESOCIB.i:. 



portion of head to body. Snout equally rounded. Teeth on the 

 whole similar, but the upper ones in front, as well as the lower, 

 incisor-like. Eyes rather larger, closer together, less than a diameter 

 apart*. Differs esseijtially from the G. marmoratus in the form of 

 the opercular spine, which is much sharper as well as somewhat 

 longer and slenderer ; also in ha\dng no spine concealed in the bran- 

 chial membrane : the lower part of the opercular membrane, just 

 above the spine, is fringed with a few thread-like filaments. The 

 number of branchial rays is the same. 



'* The dorsal and anal are both shorter, and appear to have only 

 seven rays each : the anal roaches a little nearer the caudal. 



"Everywhere of a uniform very pale brown or brownish white, 

 without any markings whatever. The eyes were probably very 

 brilhant in the living fish, the irides still showing traces of what 

 seems to have been blue and golden-pink." (Jen.) 



Length of the single specimen observed one inch ten lines. 



6. Gobiesox marmoratus. 



Gobiesox marmoratus, Jen. Voy. Bmc/le, Fishes, p. 140. pi. 27. fig. 1 ; 



Guich. in Gay, Chile, Zonl. ii. p. 336. 

 Cotylis marmorata, Mi'ill. 8f Trosch. I. c. p. 19. 

 Sicyogaster marmoratus, Barnev. I. c. p. 144. 



B. 6. D. 13. A. 11. 



Teeth strong and somewhat crowded in front, in the upper jaw 

 bluntly conical, with minute ones behind ; six subhorizontal incisors 

 anteriorly in the lower jaw, longer than the other teeth. Eyes 

 rather more than a diameter apart. 



Coasts of Chile. 



The following description is taken from the ' Zoology of the Voyage 

 of the Beagle ' : — 



"Head very large, broad and much depressed, with the snout 

 rounded nearly in exact semicircle. Body compressed behind and 

 suddenly tapering behind the pectorals. The length and breadth of 

 the head are equal, each being one-third of the entire length, ex- 

 cluding caudal. Gape reaching nearly to beneath the anteiior angle 

 of the eye. Teeth strong, and somewhat crowded in front ; in the 

 upper jaw bluntly conical or slightly curved, but of irregular size, 

 with minuter ones behind ; very small at the sides of the jaw, and 

 apparently here but in a single row. Below, the six middle teeth 

 are incisor-Hke and project forwards ; on each side of these are two 

 or three similar to those in front above, then follow some minuter 

 ones at the sides. Eyes rather more than a diameter apart. Gill- 

 opening wide, the membrane free all round, with six rays, Opercle 

 terminating behind in a l)lunt point ; there is also a kind of double 

 spine concealed in the thickness of the branchial membrane, m front 

 of the ordinary branchial rays, the extreme end of one portion of 

 which projects a little beyond the margin. 



* Probably smayor in larger specimens. 



