20 THE FROG 



92. At the points where the ducts enter the cloaca, they 

 enlarge to form seminal vesicles.^ 



93. A rudimentary oviduct ^ lies alongside of each 

 mesonephric duct. 



Drawing 8. Draw (x2) the male urogenital system, 



* Poorly developed in R. pipiens and R. cateshidna. 

 ' Absent in R. catesMana. 



