GILBERT: FISHES OF THE SUBGENUS LUXILUS


 TABLE 12. COMPARISON OF LATERAL-LINE SCALES IN THE FORMS OF LuxilUS

 Lateral-line scales
 Form 36 37 38 39 40 41 42 43 No. Mean

 N. cornutus 1 24 165 326 234 53 5 2 810 39.18
 N. albeolus 22 66 80 28 14 210 38.69
 N. chrysocephalus
 chrysocephalus 2 90 255 249 69 14 1 680 38.50
 N. chysocephalus
 isolepis 39 80 46 7 172 38.12
 N. cerasinus 4 27 21 6 58 39.48
 N. zonatus 9 18 31 19 2 4 83 39.99
 N. pilsbryi 1 13 18 21 8 61 40.36
 N. coccogenis 10 28 26 12 5 81 40.68
 N. zonistius 6 17 33 16 12 2 1 87 39.24


 TABLE 13.' COMPARISON OF ANAL RAYS IN THE FORMS OF LuxiluS

 Anal rays
 Form 7 8 9 10 11 12 No. Mean

 N. cornutus 100 749 20 869 8.91
 N. albeolus 83 4 1 88 9.07
 N. chrysocephalus chrysocephalus 49 530 10 1 590 8.94
 N. chrysocephalus isolepis 1 7 146 26* 1 181 9.11
 N. cerasinus 2 70 72 8.97
 N. zonatus 4 101 5 110 9.01
 N. pilsbryi 3 67 4 74 9.01
 N. coccogenis 4 98 13 115 9.08
 N. zonistius** 5 110 88 203 9.41

 17 specimens in one collection
 ** Of 62 specimens from Florida, 53 had ten anal rays.

 TABLE 14. COMPARISON OF VERTEBRAE IN THE FORMS OF Luxilus

 Vertebrae
Form 36 37 38 39 40 41 42 No. Mean

N. cornutus 2 2 36 136 55 6 237 40.08
N. albeolus 1 7 46 54 9 53 39.54
N. chrysocephalus
 chrysocephalus 6 53 48 7 114 39.49
N. chrysocephalus isolepis 2 35 10 1 1 49 39.27
. cerasinus 3 22 8 33 39.15
 .zonatus 4 22 2 28 39.93
 pilsbryi 6 16 1 23 39.78
 coccogenis 4 36 10 50 41.12
V. zonistius 5 32 9 46 39.09