Cristatella mucedo

Description:

Cristatella mucedo

Plate I: Cristatella mucedo from A monograph of the fresh-water polyzoa : including all the known species, both British and foreign / by George James Allman.

London :Ray Society,1856.

Description of Plate I

Fig.

1. Cristatella mucedo: an adult specimen, adhering to the submerged stem of Rannaculus aquatilis. Of the natural size.
2. The same enlarged
3. Statoblast of Cristatella mucedo in an early stage: it is surrounded by a ciliated membrane, and there is as yet no appearance of the marginal spines.
4. The same more advanced: the enveloping membrane is destitute of cilia and the spines have begun to grow out from the margin of the disc.
5. The same, still further advanced: the spines have impinged on the enveloping membrane
6. The mature statoblast: the enveloping membrane has been torn by the pressure of the spines, and has disappeared, and the statoblast has become free.
7. The same, viewed on the edge. Figs. 3-7 are magnified about 50 diameters
8. Natural size of mature statoblast.

From BHL