PLATE IV. 



CORYNE PUSILI.A, CoRYNE VAGINATA. 

 FlO. 



1. Portion of a female colony of Coryne pusUla, magnified. . 



2. A colony of Coryne pusilla, natural size, attached to a piece of Fiicus serralii^. 



3. A tentacle of Cori/ne pusilla, very mucli magnified, showing its chambered endode-rm and its 



capitulum loaded with thread-cells. 



4. A thread-cell from the capitulum before the emission of its contents, and with the superficial 



portion of the ectoderm in which it is imbedded carrying a palpocil. 



5. A thread-cell from the capitulum after the emission of its contents. 



6. Mature ovum of Coryne pusilla, as it appears just after liberation by the natural rupture of the 



gonophore. In this stage the germinal vesicle becomes visible under compression. 



7. Planula of Coryne pusilla ; the cilia are very long. A peculiar striated area is visible towards 



one end. 



8. A portion of a female colony of Coryne vayinata. At the left a hydranth-bud is seen, 



entirely enveloped in a delicate sac-like extension of the perisarc. 



9. A colony of Coryne vayinata, natural size, attached to a piece of Cysfoseira. 



