supporting lamella

506 W. B. HARDY.
Myriothela is that of Professor Allmann, which was published
in the 'Phil. Transactions ' in 1875. This was followed by a
long monograph illustrated with abundant figures, and published
at Moscow (3) in 1880, unfortunately in Russian, by
Korotneff, who was the first to study Myriothela with the aid
of properly prepared sections.
In 1881 Korotneff published a further paper dealing with
the same subject (4). A copy of this I have unfortunately
not been able to obtain. The further literature of the subject
will be referred to as occasion demands in the following pages.
The work was carried out partly in the Marine Biological
Laboratory at Plymouth, and T am grateful for the many kindnesses
experienced there. But the bulk of the work was done
in the Morphological Laboratory of Cambridge University,
and I would here thank Mr. Sedgwick for placing the resources
of his department at my service.
The general structure of Myriothela will be best learned
by reference to Allmann's monograph, and to that I must refer
my readers, merely stating here that it is a solitary attached
hydranth. The proximal part of the body is usually bent at
right angles to the rest, is covered with a thick perisarc, and
gives origin to short processes by which it is attached to the
under side of large stones. The perisarc of the foot is represented
over the rest of the body by a delicate cuticle. Following
on the foot is the middle region of the body, whence spring
numerous blastostyles. Each of these bears gonophores, male
and female, on its proximal portion, while short capitate tentacles
spring from the distal extremity. The blastostyles are
without a mouth.
The distal or oral region of the body of the hydranth is the
longest, and is studded with very numerous, small, capitate
tentacles to within a short distance from the mouth.