406 W. E. RITTER AND M. E. JOHNSON 
were averaged for the final result. Where the first and second 
measurement differed by more than 10 per cent, a third measure- 
ment was taken and the three figures averaged. 
ee 8 16 i rd 40 4% 56 64 re 68 96 104 = 120 (2B 
SEeeee eI aL 
a PCeRGe SCE SecCoae ZERORER Reese AE 
iz4 SRR ESS SERS SSS SS ReSeeeeenne ie ‘ 
| 
iE ba 
(Sea ee PEC enT EU 
104 oa ea a) [ 
100 ca | a 
g6 |_| _| Ree 
92 et | S| aa || ea 
its. sealers 
84 eS eee eee 
80 alee) SV Sa 
see (iT a, 
P eT EnnIA 
68 
jarnenate 
60 ile 
56 
2a ia 
48 | 
{ata 
lolcats Length of Zoords. 
Chain Vil Fight side 
——_+ 
| | 90-128- Whee/ portion of chain 
36 | Wheels seporoted by dolled lines 
jeeeeeaugae 
6 = aaa (ee 7 
12 | |_| —| ae 
1 aE” 
= 
Fig. 2. Plot of the length measurements of the zooids of chain VII, right side, 
including wheels. 
TREATMENT OF THE QUANTITATIVE DATA 
At first glance, one sees a resemblance between the curves for 
the wheels of Cyclosalpa affinis and the blocks of Salpa fusiformis- 
runcinata. In both cases, the end zooids are smaller than those 
nearest them, the maximum values lying somewhere between, 
usually nearer the distal end. 
