98 E. LÖNNBERG, C0NTRIBUTIONS TO THE FAUNA OF SOUTH GEORGIA. 



Inside the teeth there is a velum in both jaws, but it is interrupted in front in the 

 upper jaw. 



Preoperculum unarmed. Operculum divided in three branches, one lower and 

 two upper. The posterior npper branch is provided with 5 blunt and flat spines, 

 three of which sit at the upper end, and the two remaining at the posterior and 

 lower margin of the same branch. The latter are more knobs than spines. 



Gillrakers almost wanting but on first and second arch a few short and blunt 

 ones sit very far apart. 



The first dorsal is much higher than the second, the third ray longest (80 mm.), 

 second (75 mm.) and fourth (74 mm.) almost equal, then first (65 mm.), fifth (61 

 mm.), sixth (28 mm.) and seventh (18 mm.). The average length of the rays of the 

 second dorsal is about 33 mm. The rays of the anal are from about 38 to 33 

 mm. The pectorals are large extending beyond the beginning of the anal fin. 

 Its hindmargin is squarely truncate, although the posterior lower parts are 

 rounded. The three longest rays of the ventrals enveloped in a very thick and swol- 

 len skin. 



The upper lateral line extends nearly to the root of the tail. It is provided 

 with, on one side about 113, on the other about 119 little shields. The lower lateral 

 line is quite short and contains only about 10 little shields. 



The body is somewhat arched from the nape. The anus is situated below the 

 fourth ray of the second dorsal. The caudal peduncle is short so that the rays of 

 the anal and second dorsal fins, when depressed, touch with their tips the caudal ex- 

 pansion. 



This fish is, of course, nearly related to Richardson's Chcenichthys rhinoceratus ' 

 from Kerguelen land, but differs through the absence of a »horn» on the snout, and 

 in several other respects. The number of rays in second dorsal, and anal fins is 

 greater and so is the case with the pectoral as well in the South Georgia species 

 which has (about) three rays more. The jaws are equal in the fish of Kerguelen land 

 but the lower jaw is somewhat shorter in this one. The number of small shields 

 of the lateral line is much greater in this species, etc. 



The colour of the Chcenichthys of South Georgia is purplish brown on the back 

 with four broad blackish transverse bands. The first across the first dorsal and 

 base of pectorals, the second at the beginning, the third at the middle and the fourth 

 at the end of the second dorsal. On the sides of the head a broad blackish band 

 extends along the maxillary under the eye and across the gill-cover. The flanks 

 appear to be leaden grey, lower side of head and belly yellowish white. 



The related type species from Kerguelen land is said to have a similar ground 

 colour »varied by numerous round, or oblong, anastomosing black spöts». Its colour 

 pattern is thus distinctly different. 



Chcenichthys aceratus as its relative from Kerguelen Land is a bottom fish living 

 near the shore among the seaweeds. 



Tchthyology of tlie voyage of H. M. S. Erebus and Terror. London 1844 — 48, 



