

Putnam.] 342 [March 18, 



of the operculum. Maxillary reaching to the posterior margin of the 

 eye. Length of the eye equal to the distance from its posterior mar- 

 gin to the ridge of the preoperculum. Head one-sixth of the total 

 length of the fish. Dorsal and anal with a black margin. Gill-rakers 

 four. Air-bladder long, oval, without a foramen. 



Mediterranean. 



Agassiz Collection. No. 2542. Mediterranean. (One specimen. 

 6 inches.) 



Agassiz Collection. No. 4326. Nice, Prof. C. Gegenbaur. Re- 

 ceived December, 1864. (One specimen. %\ inches.) 



O. Holbrookii Putnam. 



Inner barbel nearly two-thirds the length of the outer. Outer 

 barbel equal to the distance from the centre of the eye to the point 

 of the operculum. Maxillary reaching to the posterior margin of 

 the eye. Length of the eye equal to the distance from its posterior 

 margin to the ridge of the preoperculum. Head one-sixth of the 

 total length of the fish. Dorsal and anal with a black margin. Gill- 

 rakers four. Air-bladder long, pointed, without a foramen. 



Gulf of Mexico. 



Boston Society of Natural History. No. 1117. Key West, Florida, 

 C. J. Maynard, 1872. (One specimen. 6 inches.) 



O. marginatum DeKay. 



Inner barbel not over one-half the length of the outer. Outer 

 barbel about equal to the head in length. Maxillary hardly reaching 

 to the posterior margin of the eye. Length of the eye very slightly 

 more than the distance from its posterior margin to the ridge of the 

 preoperculum. Head hardly one-sixth of the total length of the fish. 

 Dorsal and anal with a black margin. Gill-rakers four or five (four 

 on one side and five on the other of the single specimen examined) . 

 Air-bladder short and broad, with a foramen on the under side. 



Atlantic coast of North America from New York southward. 



Agassiz Collection. No. 2544. Charleston, S. C., Dr. J. E. Hol- 

 brook. (One specimen. 6| inches.) 



O. Rochii Miiller. 



Inner barbel very nearly equal to the outer in length. Outer 

 barbel fully equal to the head in length. Maxillary reaching consid- 

 erably beyond the posterior margin of the eye. Length of the eye 

 equal to about two-thirds of the space between its posterior margin 





