URINO-GENITAL ORGANS 



49 



Ov. 



'4-s.d. 



V.s 



FIG. 7. Diagrammatic representation of modifications of the urino - genital ducts. 

 1, 2, Male and female Newt; 3, a tubule of the kidney; 4, male Rana ; 5, 

 male Bufo ; 6, male Bombinator ; 7, male Discoglossus ; 8, male Alytes. a, Artery 

 entering, and producing a coil in, the Malpighian body, M ; B, Bidder's organ ; 

 ef.s.c, efferent segmeutal canal ; F.B, fat-body ; gl, glomerulus ; K, kidney ; l.c.c, 

 longitudinal collecting canal ; M, Malpighian body ; Md, Miillerian duct ; N, 

 nephrostome ; 0, ovary ; Ov, oviduct ; s.d, segmeutal duct ; T, testis ; Ur, ureter ; 

 V.d, vas deferens ; V.s, vesicula seminalis. 

 VOL. VIII E 



