PLATE VII. 



Fig. 1. Swim-bladder of Bairdiella chrysura. 



In normal position resting on the central tendon which joins the m. soni- 

 ficus of either side. 

 Fig. 2. Swim-bladder of Leiostomus xanthurus. 



In normal position resting on the central tendon which joins the m. sonificus 



of either side. 

 The undissected portion at the anterior of the bladder shows how the two 

 m. sonifici completely inclose the swim-bladder. 



(178) 



