no. 3642 PARROTFISH — SCHULTZ 5 



increases with increase in length, whereas in collettei the teeth do not 

 make such a change in number with length of specimen (fig. 1). Dr. 

 Collette kindly ran the number of teeth correlated with standard 

 length through the automatic data processing equipment at the 

 Smithsonian Institution and determined the correlation coefficient for 

 ustus to be .65 (significant at .001 level with 42 degrees of freedom) and 



80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 

 STANDARD LENGTH MM 



Figure 1. — Number of denticles plotted against standard length for specimens of Nicholsina 

 ustus ustus (broken line and stars) and N. U. collettei, new subspecies (dotted line and 

 squares) (coefficient of correlation: ustus=.6S; collettei=. 26). 



for collettei to be .26 (not significant at the .1 level with 22 degrees of 

 freedom) . 



This new subspecies is named "collettei" in honor of Dr. Bruce B. 

 Collette, my ichthyological colleague at the Smithsonian Institution, 

 who collected these parrotfishes in the eastern Atlantic Ocean. 



U.S. GOVERNMENT PRINTING OFFICE: 1968 



