234 HIROSHI OHSHIMA 
From comparison of the Tables IV, VI, and VIII we may 
draw the following conclusions : 
1. The numbers of pedicels in each pair of lateral radii are 
approximately equal, showing no asymmetrical features. 
2. The pedicels of the mid-ventral radius develop early, 
whereas those of the dorsal paired radii increase later. Those 
of the lateral ventral radii remain almost constant throughout 
in regard to the ratio to the total number of pedicels. 
Order of appearance of Mid-ventral Pedicels. 
Of special interest is the examination of the order of the appear- 
ance of pedicels from the mid-ventral radial canal. 
As mentioned above, the fourth pedicel develops on the night 
side of the radius in front of the third (‘Text-fig. 11, 4). This condi- 
tion is seen in the specimens nos. 1-7 of Table III. The fifth (5) 
appears again on the right side and in front of the primary pair. 
This is observed in the specimens nos. 8-15. ‘The sixth (6) 
appears on the left side behind the primary pair, as seen in the 
specimens nos. 19-22. The seventh (7) appears far forwards, 
on the left side and in front of the fourth, as seen in the specimens 
nos. 24-9. The eighth (8) appears again on the left side, imme- 
diately in front of the primary pair, as seen in the specimens 
nos. 89-41. 
Among some specimens variations are found in the order and 
position of newly-appearing pedicels. ‘The specimen no, 28 has 
the sixth on the right side instead of on the left, while the speci- 
mens nos. 17 and 18 have the sixth in front of the fourth on the 
left side. The specimen no. 16 has the fourth on the left side 
instead of on the right, and the sixth on the nght im front of the 
fourth. Nos. 80 and 31 have the seventh on the right instead of 
on the left. Nos. 38 and 34 have the fifth on the left instead of 
on the right. In no. 32 the seventh appeared on the left, imme- 
diately in front of the primary pair. In nos. 36-8 the eighth 
stands on the right side assuming the anteriormost position. 
Increase in numbers above the nine pedicels is represented 
by a few specimens. In no. 42 the ninth (9) appeared on the right 
side between the fourth and fifth. Im nos. 48 and 44 the tenth 
(10) appeared again on the right side between the nimth and 
