Report U. S. B, F, 1904. 



Plate 



1. A DEAD KINQFISH (MENTICIRRHUS) WITH EXTERNAL LESIONS 



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

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

 alive in the water. (Photograph by .T. (J. Hubbard.) 



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



THE LUMINA. 



(Photograph by .1. G. Ilubljard.) 



