TRANSACTIONS OF THE SECTIONS. 141 
be regenerated ; nay, should a fragment of the smaller or posterior ex- 
tremity be sundered from the body, an entire plume, spines, mouth 
and trowels will be generated to crown the anterior part of this frag- 
ment, and render it a perfect animal. It is very remarkable that the 
powerful reproductive property of the genus is not confined to the 
vicinity of the lost organs, the elements of others reside in different 
and distant parts of the body, from whence human perception cannot 
discover any likelihood of their evolution by means of their own ener- 
gies. The adult Amphitrite bombyx, which obtains a silken sheath 
merely by spontaneous exudation from the body, is about three inches 
long, of which a third part is the plume, consisting of sixty or seventy 
feathers (pranchie). Two artificial sections of the body, of a vigorous 
specimen, speedily invested themselves with a sheath, wherein they re- 
posed quiescent. The organization of the upper portion remained in 
its original state; the middle section acquired the wanting parts, and 
a plume of eight feathers was generated by the lower section, though 
this section had been only two lines, or the sixth part of an inch in 
length. Thus three plumes existed at once, with all their appurte- 
nances, on what had been a single animal. Young animals have few 
branchiz ; their number augments with age; and both these and the 
number of segments in all the Anmelides seem indefinite. In all their 
ciliated branchiz, likewise, the rib or shaft is originally bare, and 
clothed with the cilia developing successively upwards. 
The paper was illustrated by numerous drawings of living specimens. 
Further Researches on the British Ciliograda. By Evwarp 
Forses and Joun Goopsir. 
Since the last meeting of the British Association, the authors have 
continued their observations on these animals; no additional species 
have been discovered, but several interesting facts, elucidating their 
structure, have been brought to light. The species examined were 
the two forms of Cydippe, designated C. pileus, and C. Flemingit. 
They have repeated the observations of Mr. Garner on the ciliation of 
the walls of the stomach and vessels, and can bear testimony to their 
accuracy. The ciliz toward the base of the stomach are larger than 
those on the oval portion. A row of very minute ciliz surrounds the 
mouth, but none of these organs are seen on the filamentary tentacula, 
or on the walls of the filamentary cavities. The ciliz which are placed 
on the longitudinal ridges are linear-lanceolate in form, flat, and not 
hollow. They are not webbed together, and have no communication 
with the vessels which run beneath the ciliary ridges. Each row of 
ciliz: is mounted on a transverse base of a more solid texture, and less 
transparent than the rest of the body. The substance of this base 
consists of globules irregularly imbedded in a homogeneous substance. 
A similar structure is seen to exist in the filaments of the Cydippe, and 
the bodies of the hydroid zoophytes and of the simpler trematoid 
worms are composed of a like substance. When one of the ciliz of a 
