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Right genital gland or testis. This though somewhat 

 larger than usual was a normal mature testis, and like the ovo-testis 

 contained a single ovum only. With the exception of one small 

 spherical patch, and two or three of the problematical granular bodies 

 found in the ovo-testis, pigment cells were entirely absent. The ovum, 

 which in this case passed through 46 sections, was situated at the 

 junction of the anterior and middle thirds of the testis, somewhat 

 near the surface. The neighbouring portions of the testis were less 

 conspicuous than the remainder of the gland, and contained the most 

 immature spermatozoa. The follicle consisted of a thin fibrous mem- 

 brane, which, where cellular, resembled the normal two-layered folli- 

 cular investment, and measured 49 mm in diameter. The ovum, which 

 was 4 mm long and -35 mm broad, was in contact with the fibrous 

 capsule on one side, and connected with it on the other by two proto- 

 plasmic strands. Possibly the living ovum completely filled the cap- 

 sule. The nucleus (diameter .21 mm) was distinct and vesicular, with 

 sharply defined walls and very numerous large and small nucleoli. 

 The large nucleoli were entirely at the periphery of the nucleus, 

 whilst the smaller were exclusively medullary. The protoplasm was 

 here and there collected round the larger nucleoli, and the cytoplasm 

 contained one large peripheral vacuole. This cell is therefore an 

 undoubted ovum, at a stage of development corresponding to that 

 found in female frogs of between one and two summers. 



I think the histology of the genital glands of this frog emphasizes 

 the importance of investigating the minute structure of apparent herm- 

 aphrodite glands — a procedure which has not always been followed 

 by those describing them. 



I append brief accounts of all the hermaphrodite frogs that have 

 hitherto been described, with the exception of those recorded by 

 Pedaschenko, Mitrophanow, etc., whose publications I have un- 

 fortunately not been able to procure. 



1) Bourne. Female with ovo-testis on left side. Both oviducts 

 normal. Ureters those of normal female. The frog had been 

 badly cut up before it came into Bourne's hands, so that the 

 presence of vasa efferentia could not be ascertained. Sections 

 showed that the ovo-testis contained normal motile sperms and 

 well developed ova. 



2) Marshall. A) Male having convoluted oviducts with uterine 

 segments. Vasa efferentia and slight seminal vesicles. Four 

 openings into cloaca. Sections showed normal testis with no ova. 



3) Marshall. B) Male having sUght ovarian patches on the testes 



