320 
Merism and Sex in " Spinax Niger" 
I "I 
II ^ 
? embryo — ? adult 
Significance 
Probable 
Highly probable 
Highly probable 
Probable 
Highly probable 
o sq 01 
< 
CO ^ 00 oi a:> 
O 00 CO 00 O 1 , , 
-Jf 00 CO o 1 1 1 
'l 'l 'l 'l 'l 
Significance 
None 
None 
None 
Probable 
Highly probable 
00 00 o o -t 
"i 'm ^ 'l ' ' ' 
<1 
O CD 
^ O 1— CO 1 I 1 
O C i-H CO CO 
i embrj'o — ? embryo 
Significance 
Probable 
Highly probable 
Probable 
None 
Probable 
i-l (Tq CO Cp -T-l 
(k 00 (k ' 6^ 1 1 1 
<l 
.-H O 00 00 (M 
§i5SS2 1 1 1 
1 1 1 + 1 
I 
'3 
tc 
'-Ji 
Highly probable 
Highly probable 
Highly probable 
None 
Highly probable 
Highly probable 
Highly i.robable 
Donbtful 
O Ol CO ip 00 Cp CO 
00 00 ' rl. (3> 
1 1 1 + 1 1 + 1 
< 
O O T-i r>] O 
00 00 00 00 QC' 
i-H CO -I* o o -t o 
1 1 1 + 1 1 + 1 
Character 
Anterior spine 
Posterior spine 
Whole vertebrae 
Half vertebrae 
Total segments 
1st girdle-piercing nerve 
Post-girdle nerves 
Collector nerves 
55 g 
2 H o 05 
- «■ SS 
a » o 
O cS (B 
0^ ^ ^ S 
CH- 'i-i 
Isli 
