616 Ona Hermaphrodite Specimen of Amphioxus. 
normal testes (showing, however, at least traces of ova) to 
one testis and one apparently normal ovary. It is to be 
regretted that there is not sufficient material available to 
enable us to decide whether this proceeded still further, to 
the presence of an ovary on either side. ‘There are sections 
on the same slides as these which do show two ovaries, but, 
in the absence of any definite proof that these came from the 
hermaphrodite specimen, they cannot be considered here. 
There are two other points about this specimen which may 
be noted. Some of the sections show a mass of ova in one 
metapleural space—the right (see fig. 1). That these were 
present in the original specimen is quite clear. There is no 
sign of tearing in the sections; ova are found in sections 
where no ovary is present, and occur in a mass closely 
resembling an ovary in structure, not a collection of separate. 
ova, and are in various stages of development. ‘The lymph- 
space in which they lie is greatly enlarged. Further, one or 
e., epidermis ; m., ventral muscle; mp., metapleural space. 
two sections show ova lying in one of the secondary lymph- 
spaces just internal to the main metapleural space (fig. 6). 
What the actual significance of this may be it is impossible 
to say in the absence of further evidence; but it seems to 
open up the possibility that there is something more in the 
condition than a mere change in the character of the gonads. 
No other structural abnormality, such as the condition of 
the liver described by Orton, is to be seen in any of the 
sections. 
As regards the question of parasites, one section alone 
slows any appearance of such. Here there are two oval or 
pear-shaped bodies lying beneath the epidermis at the point 
of insertion of one of the myotome septa into the body-wall ; 
in the section the epidermis is breken at this point. These 
bodies measure about 115 by 90 microns; as they only 
appear in one section, and the stain used does not show up 
