440 
F. A. rOTTS. 
level with the parapodia of one side. This position caused 
Johnson to describe the stolons as lateral outgrowths of the 
stock (3, p. 31 1), and to apply the name of “collateral budding” 
to the phenomenon. My observations lead me to consider 
the area of proliferation as arising typically in a median 
position, the frequent displacements from the middle line 
being valuations therefrom. The correct description of the 
origin of the stolons from the stock is given in the term 
V ent r o-t er m i n al budding, for the stolons are always ventral 
outgrowths from the stock and from its last segments. M}' 
reason, however, for retaining the name collateral budding 
as applying likeivise to the phenomenon is found in the di.s- 
position of the stolons in rows, so that they lie side by side, 
and not end to end. In fact they arise collaterally with 
each other and not with the stock. 
Unfortunately, in my paper already cited, I referred to the 
phenomenain T ry panosyllis and in Syllis ramosa under 
the same name (5, p. 22), though recognising the wide differ- 
ence in the methods of budding in the two genera. It is 
with the view of correcting- this error that I take the oppor- 
tunity of tabulating and defining the three methods by wdiich 
stolons are budded amongst the Syllids. I propose to sub- 
stitute the adjective “lateral” for “collateral ” in referring to 
Syllis ramosa. 
Linear budding (terminal) . Stolons produced at the 
end of the stock, and arranged end to end in chains. 
Autolytus and Myrianida. 
Lateral budding. Stolons pi-oduced singly as lateral out- 
growths from the stock. Syllis ramosa. 
Collateral budding ( ventro-terminal) . Stolons pro- 
duced from a ventro-terminal proliferating cushion on 
the stock, and arranged side by side in rows. Try- 
panosyllis g e m m i p a r a . 
It is interesting to note a point in common to Trypano- 
syllis gemmipara and crosslandi. Both, like Syllis 
ramosa, live and feed on sponges, and as far as I can tell 
only leave their retired habitat under exceptional circum- 
