330 On the Eremophilus and Astrollcpus. 



an elevation, and in waters which are inhabited by ahnost 

 no other living being. The naturalists, who fear that new 

 species of the same genus ma)' be discovered in very dificrent 

 situations, may change the name cf eremophilus into that of 

 thrichomycteruSi taken from the barbillons or whiskers at- 

 tached to the nose of this fish. 



EREMOPHILUS. (See Plate VIII.) 



Apod. Chakacter Genericus Essentialis. 



Corpus elongatum. Cirri viaxillares 4, nasalcs sernititJi!,- 



losi 2. Pinna dorsalis et analis. Memhrana. hranchio' 



sf.ega red i is 1 — 2. 



E. MtJTisii. 

 Corpora dongaio, plumhao, cocrulescevti, mactdis deedaleis 



oUvaceis varicgata; vpi-rculi branchiosffgi ; diiplicatura 



spimiloso-serra'a. 



The body of the captain of Bogota is long, and ha'^ some 

 analogy with that of the eel. It is compressed, of a blueish 

 gray colour, and spotted with olive green. These spot?, 

 the outline of which forms very striking sinuosities, assume 

 in some ijadividuals a yellqwjsh tint. The head is little and 

 flat. The mouth, situated at the extremity of the nose, is 

 straight. The upper jaw projects over the under one : the 

 first, very long and double, is furnished with six fleshy bar- 

 billons or whiskers, of which the two exterior are the long- 

 est. Two other barbillons, shorter and semi-tubulous, are 

 placed on the nostrils. It has very little eyes, which arc 

 Veiled by a semi-transparent iper\)brane, like the gyuinotc^ 

 and lampreys. The extremity of its lips is furnished with 

 Uttle teeth resembling hjiirs. The tor^gue ia very fleshy, 

 but short. The operculum oi;' uvula forms a very narrow 

 branchial opening, and it is v^ry difficult to distinguish its 

 folds (lames). In the most part of the individuals which I 

 have examiiied, it appears to me that the captain, similar to 

 the cycloptfrus dentex and a few other fishes, has but two 

 radii or furrows, which are as if soldered the one on the 

 other. The edge of the operculum or uvula is indented. 

 The dorsal fin has eight radii, the pectoral six, that of the 

 anus six, and that of the tail, which is round^ twelve radii : 



it 



