G16 On a Hermaphrodite Specimen 0/ Ampliioxus. 



normal testes (showing, liowcvcr, at least traces of ova) to 

 one testis and one apparently normal ovary. It is to be 

 re.i^retted that there is not sufiicicnt material available to 

 enable us to deeiJe 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 abs 'nee 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 

 meta])leural 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 jjresent, and oceiu- 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 lu whicli they lie is greatly enlarged. Further, one or 



Fig. 0. 



, 0/ mm , 



e., epidermis ; ?«., ventral muscle; mp.y metapleural space. 



two sections show ova lying in one of the secondary lymj)h- 

 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 tlie 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 

 shows any appearance of such. Here there are two oval or 

 pear-shaped bodies lying beneath the epidermis at the i)oint 

 of insertion of one of the myotome septa into the body-wall ; 

 in the seetion the epidermis is broken at this point. These 

 bodies n)easure about 115 by 90 microns ; as they only 

 appear in one section, and the stain used does not sliow up 



