1887.] 



ANATOMY OF EARTHWORMS. 



54; 



examination of the genital region by transverse sections failed to 

 sliow any trace whatever of the supposed missing vesiculse of segments 

 10 and 11 ; those of segments 9 and 12 were well developed and 

 exhibit a racemose strncture, as is the case in some other Lumbricidae. 



There are large prostates as in C. rusticus. 



Spermathec(E. — There are four pairs of these organs situated in 

 segments G, 7, 8, and 9 ; they are somewhat pyriform in shape, with 

 a rapidly narrowing external duct ; each is furnished with a single 

 diverticulum which lies to the inside ; the sperniathecae open on to the 



Crytodrilus fletcheri. 



n, nepbridial pores ; v.d.f, vas deferens funnel ; v.s, xesiculee seuiinales ; c^*, 

 spermathecffi ; f, testes ; 0, ovary ; od, oviduct ; oes, oesophageal glands. 



The oesopbagus has been removed for the greater part ; in the 13th segment 

 it has bpen removed fi-om one side together with the oesophageal gland of that 

 side, to display oviduct. 



exterior in front of the outermost seta of the ventral pair. In the 

 number and structure of the spermathecse the present species differs 

 from C. rusticus, where there are two pairs of spermathecse each with 

 two or three short diverticula. 



Another curious fact about the present species is the difference of 

 minute structure between the spennatheca and its diverticulum. 

 The spermatheca itself is lined by a tall columnar epithelium : the 



