158 



600 

 400 



200 - 



60 

 40 



Z 



o 



OT 



z 



Ui 



I- 



X 



bJ 



3 

 O 



.2 - 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 

 1 1 1 — I Mill 



T 1 1 I M II I 



1 I I I MM 



I .!. 



_l L ...jl^jM.!, I. L 



!. I lI 



J I I I 1 I I 



J I I I I I I 



10 20 40 60 100 



STANDARD LENGTH IN MM. 



Figure 31. 



Table 6. 



-Relation of snout extension to standard length. Dots represent .study specimens; x's, Beebe's specimens; 

 and large black dots, the unidentified species. 



-Distribution of specimens by length and by num- 

 ber of rays in the pectoral Jin 



 Unidentified specimens. 

 'Specimen from Beebe (1941). 



SECONDARY PREOPERCULAR SPINES 



The numbers of upper and lower secondary 

 preopercular spines, in ratios (for specimens with 

 recognizable spines) are shown in table 7. A pat- 

 tern (herein called ratio, upper: lower) prevails 

 in the number of upper and lower spines for size 

 groups, although considerable overlap of ratios is 

 found. Of primary interest is the size at which 

 the 2:1 ratio (apparently the iieiglit of normal 

 spine development) occurs. Although several 

 specimens smaller than 5.5 mm. have a 2:1 ratio, 

 this ratio does not become dominant until a speci- 



