









Microns 



200 



Figure 78. — Longitudinal section of the subligamental ridge made at right angles to its dorsal surface. Bouin 3, 

 hematoxylin-eosin. bl.v. — large blood vessel; cl.m. — basal elastic membrane; ep. — epithelium; m. — muscle fibers; 

 pig.c. — pigment cells; po. — pockets between the epithelial cells; v.c. — vesic\ilar cells. 



80 



FISH AND WILDLIFE SERVICE 



