1885.] 



NEW-ZEALAND EARTHWORMS. 



823 



these bodies that are homologous with what T have described as the 

 testes of Acanthodrilus . The structure of the male generative 

 organs in Lumbricns appear therefore to be exceptional, since it is 

 almost the general rule among Earthworms for the testes to be large 



Fig. 3. 



c.p-. 



k ^^^-^^ 



Acanthodrilus dissimilis. — Dissection of genital region. 



cp, Copulatory poucli ; a, testes ; /, funnels of vasa deferentia ; v.d, vas de- 

 ferens; ov, ovary; o.d, oviduct; n, opening of nephridia ; t, f, peculiar 

 glands bomologous (?) with ovaries ; p, prostate ; sc, sac containing penial 

 setiE. A portion of the oesophagus, and the testes of left side have been 

 removed. 



glands, not in the least comparable in size to the ovaries. The fact 

 that the true testes of Lvmbricus are approximately of the same size 

 as the ovaries, might lead any one to doubt on « priori grounds of 

 the correctness of my description ; but the racemose character of 

 the testes in Acanthodrilus, which I have found more marked in 



