FISH. 141 
ing wide, the membrane free all round, with six rays. Opercle terminating behind in a blunt 
point: there is also a kind of double spine concealed in the thickness of the branchial mem- 
brane, in front of the ordinary branchial rays, the extreme end of one portion of which projects 
a little beyond the margin. 
The dorsal commences a little beyond the middle of the entire length, and leaves a space 
between it and the caudal; the rays nearly equal, except the first, which is short. The anal 
begins under the fourth or fifth dorsal ray, and extends a trifle further than that fin. Caudal 
slightly rounded. 
CoLtour—(In spirits.) Back and sides light brown, reticulated with black: the reticulations have 
a tendency to form three or four broad fascize across the back. Under parts yellowish. 
Habitat, Archipelago of Chiloe. 
This and the following species appear to belong to the genus Gobiesow of 
Cuvier’s “‘ Regne Animal,” and are probably new. Two specimens of the one 
above described were found by Mr. Darwin under stones off the island of Lemuy, 
in the Archipelago of Chiloe. 
oF GoBIEsox PQ@CILOPHTHALMOS. Jen. 
Prats XXVII. Fig. 2. 
G. fuscescenti-albidus, immaculatus: dentibus anterioribus majoribus, supra et subtus 
encisivis : operculo postice sping acutd armato; membrand operculari margine, supra 
spinam, cirris paucis filamentosis fimbriato; membrand branchiali spind nulld : pin- 
nis dorsali et anali septem-radiatis. 
BeG6s D7 AL 7 C.12-ee 23 
Lone. unc. 1. lin, 10. 
Form.—General form the same as that of the last species, including the proportion 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 
essentially from the G. marmoratus in the form of the opercular spine, which is much sharper, 
as well as somewhat longer and slenderer ; also in having no spine concealed in the branchial 
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 
reaches a little nearer the caudal. The pectorals on the contrary have rather more rays. 
Cotour—(In spirits.) Every where of a uniform very pale brown, or brownish white, without any 
markings whatever. The eyes were probably very brilliant in the living fish, the irides still 
showing traces of what seems to have been blue and golden pink. 
Habitat, Galapagos Archipelago. 
A single individual of this species was obtained by Mr. Darwin in tidal pools 
at Chatham Island, in the Galapagos Archipelago. 
