__335_ 



Bourne; internally it is notched and incompletely subdivided into 

 three segments, in a manner suggestive of that more complete sub- 

 division met with among the Amphibia caudata. The vasa efierentia 

 are normal. 



The oviducts (od) are well developed on both sides, that of the 

 left side being the more mature. This terminates posteriorly in a 

 well-marked and highly distensible uterine segment {ut), and its niu- 

 ciferous glands were fully diöerentiated, as was shewn by its swelling 

 up under water, in the manner familiar in the normal female. Both 

 oviducts open into the body-cavity (od") and into the cloaca (od') by 

 well-defined orifices, which are indistinguishable in size and detailed 

 characters from those of the female. 



The ureters (Wolffian ducts) (iv.d.) are somewhat more slender 

 than is generally the case in the normal male and they are in close 

 apposition posteriorly. Their orifices are distinct {w.d!) and related 

 to those of the oviduct {od') as for the normal female. Each ureter 

 is enlarged postero - externally to form a vesicula seminalis; that of 

 the left side is the larger of the two, and both are closely bound 

 down to the dorsal faces of the enlarged bases of the oviducts. 



I am unable to add anything to the exhaustive account of the 

 histology of this "ovotestis" given by Knappe. 



Marshall's researches have been supplemented by Matthews 

 and Sutton, both of whom have examined large series of specimens; 

 find the condition of the parts in the individual under my hand has 

 an important bearing on the questions raised by these later observers. 

 Matthews states that the persistence of the Miillerian duct in the 

 male, is of much more general occurrence in the Toad than in the 

 Frog, basing his deductions^) upon the fact that of 230 male Toads 

 examined 207 possessed more or less complete oviducts. Sutton 

 asserts^) that "when a male Frog develops a Bidder's organ or ovary 



in conjunction with the testis the Miillerian duct or oviduct 



then assumes some considerable size" and, on the results of examination 

 of more than 250 specimens, he makes the generalization "that as a 

 rule, the amount of development of these ducts is in direct proportion 

 to the size of Bidder's organ". The specimen under consideration 

 appears to support this deduction; for, on comparison of the two 



4) Footnote to a paper on "Oriduct in an ndult male Skate". Journ. 

 of Anat. and Phys., Vol. 19 (1885), pp. 144 — 149. 



5) Diseases of the reproductive organs in Frogs, Birds and Mammals. 

 Ibid. pp. 121 — 143. 



