MM. Kowalevsky and Barrois on Anchinia. Ly 
question in detail, and demonstrated that the lateral buds must 
really be regarded as individuals charged with the above 
functions. 
Thus upon the stolon of Doliolum there exist young median 
buds of which the organs of nutrition and respiration are not 
yet developed, and lateral buds which possess large branchie 
as well as a completely developed intestinal canal, and a part 
of which, thanks to their early development, nourish the less 
developed buds. 
In Anchinia there is only one kind of bud; there are none 
which are specially appropriated to the functions of nutrition 
and respiration. But among those whose development 1s 
more advanced we find a certain number whose organs of 
digestion and respiration are in complete activity. ‘They can 
the better perform their functions because they are scattered 
among younger buds throughout the length of the stolon; and 
they present a most evident analogy of function with the 
lateral buds of Doliolum. 
We have studied the position of the buds upon the stolon, 
their relations with it, and, lastly, their reciprocal arrangement 
on its surface ; and we have found that in these three points 
their relations are the same as those which exist between the 
buds of Doliolum and the dorsal stolon. 
It is well known that in Doliolum this stolon is produced 
by an asexual form, which loses all its organs of nutrition, 
and becomes reduced to a mere motory organ—an individual 
whose business is to carry the chain, and whose brief existence 
only lasts for the time necessary for the maturation of the 
buds. 
In Anchinia we do not know the corresponding asexual 
form. But the close resemblances that we have just indicated 
between all the other points of organization and reproduction 
in Doliolum and Anchinia appear to us to be so striking as to 
permit us to conclude that the generation which produces the 
stolon of Anchinia resembles Doliolum, or even that it is 
simply a Doliolum. 
It remains for us, in conclusion, to discuss a final question— 
that of the ultimate fate of the buds of Anchinda. 
It is a fact worthy of remark, that of the three specimens 
of Anchinia which have come into our hands, two furnished us 
only with imdividuals which had all arrived at complete 
maturity, and were furnished with genital organs and a diges- 
tive tube perfectly developed. There were no longer any 
traces of fresh buds, or of parts capable of producing them ; 
there existed in them only a single mode of reproduction—- 
sexual generation. 
Ann. & Mag. N. Hist. Ser. 5. Vol. xii. 2 
