Report U. S. B. F, 1904. 



Plate 



/ 



1. A DEAD KINQFISH (.MENTICIRRHUS) WITH EXTERNAL LESIONS 



The pop-fye is marked, and vesicles of gas appear in all the fins and in the skin behind the pectoral. 

 The illustration gives a quite inadequate idea of the striking appearance of the specimen as seen 

 alive in the water. (Photograph l)y .T. G. Hublmrd.) 



2. THE GILL FILAMENT OF A FISH UNDER A LOW MAGNIFICATION, SHOWING GAS EMBOLI IN 



THE LUMINA. 



(Photograph by J. G. Hubbard.) 



