330 



Fishery Bulletin 92(2). 1994 



sents general size, with relatively high character 

 loadings (Table 4) for most characters, the excep- 

 tions being tooth characters and the two measure- 

 ments of the temporal fossa. The specimens from 

 blocks in the northeastern portion of the range tend 

 to be small (Figs. 3 and 4), whereas those to the 

 south and southwest typically are larger. The larg- 

 est specimens were found in block 0802, which en- 

 compasses a portion of the Hawaiian Islands. Com- 

 ponent II reflects tooth counts and measurements 

 associated with toothrow length (Table 4). Blocks 

 with relatively high values for these characters are 

 found near the top of Figure 3, whereas those with 

 low values tend to be near the bottom. 



Blocks with single specimens were not used in the 

 delineation of the principal components but have 



been projected onto components calculated by using 

 the 29 blocks (Fig. 3). In general, the single-specimen 

 blocks fall close to where one would predict based on 

 their geographic position; some exceptions are ex- 

 pected based simply on expected chance variation. 



Interblock morphological differences are summa- 

 rized in the phenogram in Figure 5. Two blocks 

 (0312 and 0802) are loosely joined in the most dis- 

 parate cluster. Remaining blocks are divided into 

 two clusters. The one represented at the top of Fig- 

 ure 3 includes the blocks from the south, southwest, 

 and west, whereas the other includes blocks from 

 the northeastern portion of the range. 



Clusters based on the function-point procedure 

 are summarized in the modified skyline diagram in 

 Figure 6A. The most distinctive block is 0802 (en- 



