hall: mesonephros and mullerian duct in amphibia. 125 



tae. e'lh. a 



tae. e'th. $ 



tae. e'th. y 

 tae. e'th. y' 



Thickened epithelial 

 band from the an- 

 terior evagination. 

 Thickened epithelial 

 band from the pos- 

 terior evagination. 

 ,'The band posterior to 

 the fusion of por- 

 tions a and 0. That 

 which is dorsal to 

 the shelf is desig- 

 nated by y, that 

 ventral by y'. 



thl. ms'nph. . . Mesonepliric (inner) 

 tubule. 



thl. nph'stm. . . Nephrostomal (outer) 

 tubule. 



thl. pr'nph. 1, 2, 3 First, second, and 

 third pronephric 

 tubules. 



trn. clg. . . . Collecting trunk. 



irt. in Ahmentary tract. 



va. sng. . . . Blood-vessel. 



vst. nph. . . . Nephrostomal vesti- 

 bule or common 

 nephrostome. 



VOL. XLV. 



KO. 2 



