HALL: MESONEPHROS AND MULLERIAN DUCT IN AMPHIBIA. 125 



tae. e'th. a 



tae, e'th. $ 



tae. e'th. y 

 tae. eHh. 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 $. That 

 which is dorsal to 

 the shelf is desig- 

 nated by 7, that 

 ventral by 7'. 



tbl. ms'nph. . . Mesonephric (inner) 

 tubule. 



tbl. nph^stm. . . Nephrostomal (outer) 

 tubule. 



tbl. pr'nph. 1, 2, S First, second, and 

 third pronephric 

 tubules. 



trn. clg. . . . Collecting trunk, 



trt. in Alimentary tract. 



va. sng. . . . Blood-vessel. 



vst. nph. . . . Nephrostomal vesti- 

 bule or common 

 nephrostorae. 



VOL. XLV. — NO. 2 



