MUSEUM OF COMPARATIVE ZOOLOGY. Tl 
lateral and of median buds. From around each of the lateral buds, in 
like manner, both lateral and median buds of a higher order arise. But 
from each of the median buds only median buds arise. These median 
buds, are not, however, all of the same kind. The one first produced (a x, 
of Formula 7, # of Form. 8) differs from all formed after it (b *, c *, d x, 
etc.) in this, that it bears no polypide, but forms the tip of a stolon 
from which both median and lateral buds arise (8, a, near extreme right of 
Form. 8). From the second and all succeeding median buds (a b, c, ete., 
Form. 8), there arise only median buds of a still higher order, Of the 
latter, the first, as before, produces no polypide, but becomes the tip of a 
stolon giving rise to both median and lateral buds ; the others give rise 
to only median buds of a still higher order, and so on. Our former for- 
mula assumed that all median buds were alike, and all incapable of giving 
rise to lateral individuals. Their dissimilarity introduces a complication, 
so that the species must be represented by some such formula as 
this; — 
* 
e 
* 
* * 
"rar b xa * 
12 * * 
a 
* * * 
* a, * wt * ay * 
* * * * 
Br ax ar Hat ra ra * Be 
* * * 1. 
* * a, * * ay * 
xb * B * 
* * 
(8) ie 
* * 
„ar a ea* a 
* * * * 
* a 3% 
raw * * a, * * 
2 3 5 * My * 
* * * e 
Dak Cease Bx be ae thar Ax ce Dxttak Br ax at Se Be tax ay «3 
* * * a 
Mg at T * ay * 
*A* * ay, * * 
* a w% 
etc. etc. 
1 Tt must be borne in mind that such a graphic representation as this, while it 
agrees with the descriptions and figures of Kraepelin and Hincks (’80, Plate 79) so 
