410 



BAL/ENOPTERID/E. 



outer edge being nearly as wide as the mandible. The 

 bones generally are somewhat slender and dense in 

 structure. 



The following are some of the measurements of Ru- 

 dolphi's specimen, and of the Charmouth example : — 



Entire length . 

 From nose to flipper 

 Length of ,, 

 Breadth of ,, 



Our illustration is a copy of the only figure of this 

 species with which we are acquainted, drawn from Ru- 

 dolphi's original specimen, and published in Brandt and 

 Ratzeburg's " Medizinische Zoologie" (Vol. I., pi. XV., 

 fig. 3), under the name of Balatna rostrata ; as the back 

 is turned from the spectator the dorsal-fin is not shown. 



