1902." 



NEW SPECIES OP EARTHWORMS. 



201 



p. hindei, the only species in which, so far as I am aware, any 

 sti-uctures of the kind liave been met with or described. It may 

 I think, be admitted that in this genus Polytoreutus the spermato- 

 phores are very much like those of the Tubificidje, and that they 

 occur in two forms distinctive of diffei'ent species of that genus. 

 An examination of the sj^ecies of Polytor&utus which I have named 

 P. kenyaensis and P. montis-henyce has shown that the same kind 

 of spermatophoi'es exist, but not in gi-eat abundance, in the 

 spermathecal sac. These spermatophoi-es in P. kenyaensis ai'e of 

 the type chaiucteristic of P. magilensis, but are smaUei- and more 

 slender than in the much larger species P. magilensis. The 

 spermatophores, when present, were found in the region of the 

 spermatophore nearest to the external orifice. I never observed 



B.p.'r 



Longitudinal section through the spermathecal sac and the adjacent region of 

 Foltjtoreutus Tcenyaensis. 



I., intestine ; S., spermatophoral case. Other letters as in text-fig. 50. 



them to be so localized in position in the other species where 

 these bodies occur. I failed to find in the present species, as I 

 also failed to find in Polytoreutus magilensis, any indication that 

 the spermatophores are immature forms of the same bodies in the 

 species P. montis-kenyce, P. violaceus, and P. hindei, in which two 

 latter, it will be recollected, the chitinous sheath forming the wall 

 of the spermatophore is much thicker. These additional facts, 

 therefore, strengthen my earlier contention that there are two 

 different forms of spermatophore in this genus. These facts, 

 however, are not, so far as concerns P. kenyaensis, all that is to 

 be said with respect to the spermatophoral appai-atus in that 

 species. In a few individuals out of a large number which I 



