910 ON THE EARTHWORMS OF THE " SKEAT EXPEDITION." [Dec. 4, 



It is plain, therefore, that the minute anatomy of this species bears 

 out the very close external resemblance between the male pores 

 upon segment xviii. and the " genital papillae '' upon segment xix. 

 We may possibly regard the mass of gland-cells in the latter as re- 

 presenting the glandular investment of the spermiducal gland of the 



MH 



Anterior end of Amyntas biporus. 

 P, papilla on segment xix. 



X 4. 



former. In any case this is rhe nearest approach to be seen in a 

 true Amyntas of the originally present second pair of spermiducal 

 glands which occur in so preponderant a proportion of Acantho- 

 driloid forms. 



