. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DEVELOPMENT OF THE EGG OF CLAVA LEPTOSTYLA. 211 HERMAPHRODITISM. An interesting feature in the reproduction of this hydroid is the fact that occasionally individuals, and perhaps colonies, are found in which gonophores contain both eggs and spermatozoa. Figs, i, 2 ; Fig. 5, PI. IX., show various phases of this somewhat anomalous condition. As will be observed, the elements are in various stages of development, some of the eggs well along toward full growth, and spermatozoa like- wise well advanced. In most cases the conditio
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DEVELOPMENT OF THE EGG OF CLAVA LEPTOSTYLA. 211 HERMAPHRODITISM. An interesting feature in the reproduction of this hydroid is the fact that occasionally individuals, and perhaps colonies, are found in which gonophores contain both eggs and spermatozoa. Figs, i, 2 ; Fig. 5, PI. IX., show various phases of this somewhat anomalous condition. As will be observed, the elements are in various stages of development, some of the eggs well along toward full growth, and spermatozoa like- wise well advanced. In most cases the condition shown at Fig. 5, PI. IX., was the prevalent one, namely, where one half of the gonophore bore sperms and the other half an egg. In a few cases, however, a well developed egg was found on each side nearly or quite surrounded by sperm- cells. Of course, hermaphroditism in itself is nothing strange among animals, whether high or low. Even among hydroids it is quite familiar in the common Hydra, though here it is not common to find both organs in active function at the same time on any given in- dividual. I have also found a sim- FIG. I. Longitudinal section ilar condition in Hydractinia, and throu§h youn§ g°i>°ph°re, showing at b the development of spermary, at Bunting ( 94), has likewise figured e and ^mixed gonads. a single case though without giv- ing any details concerning it. In the whole of his extended researches on the " Origin of Sex Cells in Hydromedusse'' Weismann makes no mention, so far as I have observed, con- cerning hermaphroditism. It would seem somewhat remarkable that he should not have observed some indications of such a con- dition if it were at all common. Indeed, though having found repeated cases of it in Clava, I am disposed to consider it as a rather rare phenomenon in this b. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of thes
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
