488 THE AMERICAN NATURALIST. [Vol. XXXVIIl. 



September. Both of these ck 



3e a very recently acquired 



ivelop in the right oviduct (Fig. i, 

 uf), the left being very rudi- 

 mentary and apparently quite 

 functionless (Fig. i, Loci). The 

 right and left ovaries are equally 

 well developed and a single ovum 

 matures in each, but both ova 

 enter the right oviduct. 



The rudimentary left oviduct 

 is represented by a slender tube 

 usually extending forward only 

 about as far as the anterior ends 

 of the kidneys, which are situ- 

 ated in the most posterior por- 

 tion of the body cavity (Fig. i, 

 /. od). The anterior end of this 

 aborted oviduct is terminated 

 by a very narrow canal which 

 usually shows a tendency to be- 

 come more or less convoluted. 

 It is especially noteworthy that 

 this convoluted, terminal canal 

 shows great variation in length 

 in different individuals. In a 

 single specimen examined it was 

 about half as long as that of the 

 functional right oviduct. In this 

 single instance the rudimentary 

 oviduct is terminated anteriorly 

 by an ostium opening into the 

 body cavity. The posterior end 

 of the left oviduct is but little 

 smaller than that of the right, 

 and has a similar structure and 

 similar relations with the cloaca. 



These peculiarities furnish a 

 striking example of what appears 



anatomical character — one which 



