574 
PROFESSOR ALLMAN ON THE STRUCTURE 
b. Gonogenetic chamber, in which the contents have become accumulated 
on the walls and show imbedded nucleus-like bodies ; c. Diverticulum from 
the cavity of the blastostyle ; d. Orifice in the endoderm forming the roof of 
the gonogenetic chamber. 
Fig. 3. A still more advanced stage of the female gonophore. 
b. Gonogenetic chamber filled with a granular plasma, in which a great 
number of nuclei have become developed ; c. Diverticulum from the cavity 
of the blastostyle, which with its endodermal walls now projects as a spadix 
into the gonogenetic chamber ; d. Very delicate structureless membrane, 
which separates the generative mass from the endodermal walls of the gono- 
genetic chamber. 
Fig. 4. Stage still further advanced. Cell-boundaries have begun to show themselves 
in the plasma of the gonogenetic chamber, and the nuclei have become sur- 
rounded by differentiated masses of protoplasm. 
Fig. 5. Nucleolated nuclei, isolated from the contents of the gonogenetic chamber in 
fig. 3. 
Fig. 6. Some of the cells forming the contents of the cavity of the gonophore in fig. 4. 
Fig. 7. More advanced stage of the female gonophore. The ovarian tissue has become 
looser, and now consists for the most part of detached oval masses of proto- 
plasm each with a nucleus and nucleolus. Towards the centre, where they 
are in contact with the spadix, some of these have coalesced into larger 
masses. 
a. Cellular lining of the cavity of the gonophore, w 7 here at the summit of 
the gonophore its cells become loaded with coloured granules, forming a 
purplish ring which surrounds the orifice. 
Fig. 8. Some of the nucleated oval masses of fig. 7 removed from the gonophore, and 
seen to have become united to one another by protoplasmic prolongations. 
Fig. 9. A group of the same bodies. Between several of them the union has become 
closer. 
Fig. 10. Gonophore still further advanced than fig. 7. Nearly all the free oval bodies 
have coalesced into a small number of large protoplasm masses. 
a. As in fig. 7. 
Fig. 11. Surface of one of the protoplasm masses of fig. 10, very much magnified, 
showing the presence of minute pseudopodial projections. 
Fig. 12. Portion of the walls of a mature gonophore (fig. 7), very much magnified, 
showing details of structure. 
a. External zone of spherical cells ; b. Zone of clavate tissue ; c. The fibril- 
lated lamella; d. Cellular lining of the gonophore cavity; e. Very thin struc- 
tureless membrane directly investing the generative elements ; f. Generative 
elements. 
Fig. 13. Structure of plasmodium formed by coalescence of the simple ova. 
