EXPLANATION OF PLATE XLI. 



Figure 



1. Gadus argenteus, Guichenot (p. 434). 



la. View of the superior surface of an adult head, showing the arrangement of the mueiferous 

 cavities : m. c. 



2. Nettophichthys retropinnatus, Holt (p. 511). 



Type specimen. 



3. Gobiics Friesii, Malm. (p. 417). 



[518] 



