AGASSIZ AND WOODWORTH: VARIATIONS IN EUCOPE. 191 
The formula for the third stage, with 48 tentacles, is, 
To to, ti, boy To, boy ty lo, To, to, 115 ly Te, 
or, as in the table, 3, 3, 3; 3, 3, 3; 3, 3, 3; 3, 3, 3; of which fourteen 
specimens were found from the number tabulated for variations. 
In the fourth stage the formula is, 
Ts fa, ta, ta, 115 [m ty, ty, Tos ts; toy ts, tis tz, 125 135 To, ts, to, ts, 115 ts, bo, m Los 
or 96 marginal tentaoles. 
Of this normal stage only two specimens were observed. 
Of the fifth stage, with 192 marginal tentacles, of which the follow- 
ing is the formula, not a single normal stage was observed : 
To ta, ts, ty, toy ty, lg, Um hy [7n ta, ty, ty, ta, ts, la, lr» la ts, m 125 ty, T tay hy 
lp ts ta bay la by, tay To, tay tss ty tos tay tas tas boy tay ts, tas try La, tay La, bo, 
ty, lay ta To. 
But a few specimens were seen with the normal number of 15 tentacles 
in some of the primary divisions of one quadrant. 
Of the sixth stage, with 41 tentacies in each of the primary divisions 
of the quadrant, not a single specimen was collected. 
It is interesting to note that in the specimens which may be said to 
belong to the second stage, some of the primary divisions of the quad- 
rants remain in the first stage with only one tentacle, and others with 
two, the third tentacle not having developed. 
Between the second and third stage, in a number of specimens, the 
greatest number of tentacles in a primary division of the quadrant is 
four, and the smallest one. In a number of cases two or even three of 
the quadrants remain in the second stage, and only in one quadrant do 
we find four tentacles in a primary quadrantio division. Similarly, we 
find a number of specimens with five tentacles as the largest number in 
any primary quadrantie division, and some of the quadrants in the second 
stage, but none in the first. Even when we come to six tentacles as the 
largest number of tentacles in any primary quadrantio division, we still find 
some of the primary quadrantie divisions in the second stage, and occa- 
sionally a whole quadrant or a quadrantie division above the first stage, 
as is the case in the second stage and stages intermediate with the third. 
Only four specimens typical of the normal third stage were observed, 
and the great majority of the other specimens in which seven tentacles 
were found in a quadrantic division belonged to stages approximating 
the third more nearly than the second. Only a small proportion of the 
specimens were observed in which the quadrantic divisions belonged to 
