GENERAL ABBREVIATIONS. 



The numerical measurements given with each specific description 

 are only averages, and considerable variations are likely to be found. 

 In the fishes the Roman numerals indicate stiff rays, and the Arabic 

 soft rays in fins. When the figures are separated by a dash or plus, 

 the fin is composed of corresponding distinct parts. Posterior finlets 

 are also represented by a Roman numeral indicating their number. 

 The number of scales along the lateral line (or in its absence, along an 

 imaginary line) are indicated, and when the scales are unlike on 

 <iii!erent parts of body, the number is broken by dashes or otherwise. 



(787) 



