380 



BULLETIN OF THE BUREAU OF FISHERIES 



Pv/P: 



SmaU fish, (1.4) 1.7-2 (2.4), with the mode at 2. 

 Large fish, (1.3) 1.6-2 (2.4), with the mode at 1.8. 



Av/V: 



Small fish, (1) 1.2-1.5 (1.7), with the mode at 1.4. 

 Large fish, (1) 1.3-1.6 (1.9), with the mode at 1.5. 



On account of the smaller snout and maxillary in small specimens, the 



HD + AB 



M + S 



value averages higher in this group. It equals (1.30) 1.45-1.65 (1.75), with the mode 

 at 1.55. For larger specimens the value is (1.30) 1.45-1.55 (1.75), with the mode at 

 1.50. The data summarized above and those in Table 25 indicate that the small 

 specimens have fewer and shorter gill rakers on the first branchial arch, a larger 

 eye, a somewhat shorter snout, maxillary, and pectorals, and a slightly larger head 

 and longer ventrals. The depth, as is usual, is less in small individuals. Specimens 

 150 millimeters in length usually show maturing sex organs. Individuals less than 

 200 millimeters are immature occasionally, but less than 1 per cent of more than 

 1,000 specimens examined of greater size had undeveloped sex organs. 



Zeniihicus resembles closely only reighardi and nigripinnis. From reighardi 

 it may be distinguished by its longer snout, more gill rakers, smaller eye, shallower 

 head, and narrower body. A comparison of such figures as can be accurately expressed 

 in figures follows: 



Gill rakers on the first branchial arch : 



zeniihicus, (32) 39-43 (46) , with 80 per cent more than 38. 



reighardi, (32) 34-38 (42), with 10 per cent more than 38. 

 H/E: 



zeniihicus, (3.9) 4.2-4.6 (5.1), with 80 per cent more than 4.2. 

 reighardi, (3.6) 3.9-4.2 (5), with 9 per cent more than 4.2 



H/S: 



zeniihicus, (3.1) 3.3-3.6 (4), with 12 per cent more than 3.5. 

 reighardi, (3.4) 3.6-3.9 (4.1), with 93 per cent more than 3.5. 



Zeniihicus has, on the average, a longer maxillary, longer paired fins, and more 

 scales in the lateral line. It has also been observed that the ovaries of reighardi 

 are almost always yellowish in color, at least in September, while those of zeniihicus 

 are more often orange. 



Zeniihicus has, on the average, a longer snout and maxillary, a shorter anal base,, 

 less depth of head and body, and fewer scale rows than nigripinnis cyanopterus. 

 The cumulative differences of the first four characters combined are expressed by the 



than 1.55, and for nigripinnis cyanopterus (1.45) 1.65-1.75 (1.85), with 95 per cent 

 more than 1.55. For zeniihicus the body depth contained in the total length is (3.6) 

 4-4.7 (5.4), with 91 per cent more than 3.9, and for nigripinnis (3.2) 3.6-4.3 (4.6), with 

 45 per cent more than 3.9. 



COMPARISONS 



?6 



HD + AB 



M+S 



ratio, which for zeniihicus is (1.30) 1.45-1.55 (1.75), with 14 per cent more 



• «The specimens compared in this section for proportions are those 200 or more millimeters long, except artedi, which are 225 or 

 ■ more millimeters. Counts are given for specimens of all sizes. 



