Fishes of Bronkhaven^ L. I. 297 



ter. The scales extend over the body and head ; they are 

 large but not prominent, and when the fish is alive are scarcely 

 discernible. A number of very distinct mucous pores are 

 scattered on the top and sides of the head. The lateral line 

 arises at the upper angle of the operculum, and runs in nearly 

 a straight course to the tail ; it is not apparent vvitliout close 

 observation. 



The dorsal fin arises one inch from the point of the upper 

 jaw, is half an inch in length, three tenths of an inch in height, 

 rounded, rays all flexible. The anal fin arises one fifth of an 

 inch posterior to the origin of the dorsal, is three twentieths 

 of an inch in length, seven twentieths in height. Origin of 

 the ventrals three tenths of an inch anterior to that of the 

 anal ; they are one tenth of an inch in length, three tenths in 

 height. Pectorals rounded, arising immediately posterior to 

 the termination of the operculum, a little more than one tenth 

 of an inch in length, one fourth of an inch in height. Cau- 

 dal fin one fourth of an inch in length, four tenths in height, 

 rounded. 



Branchial rays four. 



Fin Rays, D. 15 ; P. 14 ; V. 6 ; A. 9 ; C. 13. 



This species appears to me correctly referrible to the ge- 

 nus Fundidus, as it agrees with it in all points. It is, indeed, 

 very distinct from the fishes placed in that genus by Dr. De- 

 kay ; still I think it ought to be called Fundidus, while those 

 which he has included under that name I should arrange with 

 Hydrorgira of Le Sueur. To this latter genus, the species 

 which I have described, evidently does not belong ; but before 

 mentioning the points of difiference it is necessary to notice 

 one or two of the peculiarities of Hydrargira. 



Le Sueur describes his genus as having the '\jaws protrac- 

 tile," and the structure of the mouth which renders them pro- 

 tractile, is somewhat peculiar. The whole of the mouth, so 

 far as the upper jaw is concerned, is formed by the intermax- 

 illaries, which are very large. The pedicels of these intermax- 

 illaries are unconnnonly long, thus enabling the vviiole to be 

 thrust far forward, and rendering the mouth protractile. And 

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