DEVELOPMENT OF CUCUMARIA ECHINATA 233 
Let us further examine the more advanced individuals : 
TABLE V. 
Length 
of body Date of 
No. inmmm. collection. GD Vee Li. Rive Dat Rotat: 
1 3:3 August 1, 1916 5 i 8 6 6 32 
2 3-7 b; - 4 6 9 7 4 30 
3 3:2 Pe be 5 7 9 6 6 33 
4 3-0 + vs: 5 8 9 6 6 34 
6 2-5 i in 9 8 10 7 7 41 
7 3-9 July 20, 1916 6 8 11 8 7 40 
8 3:5 July 25, 1916 9 11 11 8 8 47 
9 3-9 August 1, 1916 10 12 13 14 9 58 
10 4:8 33 3 10 14. 14 12 10 60 
11 4:8 3 E 12 16 15 16 12 71 
12 4:8 5 ae 10 13 16 13 10 62 
The summarized result of these twelve specimens is as follows : 
TaBLeE VI. 
LD. LV. MV. RV, RD. 
Total. 2 90 118 135 110 90 
Average . aD 9-8 11-3 9-2 7:5 
Percentage ~ 16:6 21:7 24-9 20:3 16-6 
Of adult individuals of different sizes the number of pedicels 
with reference to the radii is as follows : 
TasuE VII. 
Length of 
No. body in mm. LD. LV. MV. EAVe RD. Total. 
1 9-0 29 38 42 35 33 thei? 
2 8-0 36 40 43 40 39 198 
3 9-0 41 53 55 49 47 245 
4 10-0 53 60 62 62 55 292 
5 18-0 64 75 79 80 63 361 
6 16-0 72 76 80 78 73 379 
7 16-0 66 76 83 74 70 369 
8 29-0 108 120 132 126 105 591 
9 30-0 112 133 140 129 111 625 
10 32-0 121 140 148 136 123 668 
From these ten specimens the following summary can be 
derived : 
TasLE VIII. 
LD. LY. MV. RV. RD. 
Total. S102 811 864 809 719 
Average . 2 70:2 81-1 86-4 80-9 71-9 
Percentage 5 ERY 20:8 22-1 20-7 18-4 
