228 HIROSHI OHSHIMA 
again, is larger and stands just above no. 1. The same relation- 
ships are to be seen in the corresponding parts in the following. 
The angular divergence may often vary as much as_ two- 
sevenths (ca. 102° 51’ 25”), but rarely to three-elevenths (ca. 
98° 19’ 5”). In the former case the branch no, 8 comes above 
no. 1 with two spiral turns between them, while in the latter 
no. 12 comes above no. | after three turns. 
‘No, 1 of the first order gives out smaller branches about 
fifteen in number, arranged in a dextrorse spiral, with an angular 
divergence of one-quarter or 90°, or rarely one-third or 120°. 
These I may eall branches of the second order. Among them 
no. 1 is the largest. Hach of these branches of the second order 
again gives out smaller branches, the third order, in a sinistrorse 
spiral or turning “ against the sun ’’, with an angular divergence 
of one-quarter or one-third. These of the third order produce 
still smaller branches, the fourth order, in a dextrorse spiral, 
and these latter once more give out the smallest branches, the 
fifth order, in a sinistrorse spiral. 
‘No. 2 and subsequent branches of the first order give out 
a series of smaller branches in a manner quite contrary to that 
found in no. 1. Here the branches of the second and fourth 
orders are arranged in the sinistrorse direction, those of the 
third and fifth orders in the dextrorse direction. 
‘The two ventral tentacles differ in appearance from the other 
eight. But a closer examination reveals the fact that they are 
only modified in the relative sizes of branches. Here no. 2 
of the first order! is of a length almost equal to the main stem, 
giving the tentacle the appearance of being bifurcated. Further, 
no. 1 of the second order given out from no. 1 of the first order 
is relatively large. Just as in the other eight tentacles the 
arrangement of the smaller branches of no. 1 of the first order 
is the reverse of that found in no. 2 and_ subsequent 
branches. 
‘Thus the tentacles of C. echinata branch according to 
a definite plan like the phyllotaxis among plants. The angular 
1 In the preliminary paper (40, 1918, p. 387) I was in error in stating 
that this was the first branch, 
