1887.] 



ANATOMY OF EARTHWORMS. 



547 



examination of tlie genital region by transverse sections failed to 

 show any trace whatever of the supposed missing vesiculee of segments 

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

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



There are large prostates as in C. rusticus. 



Spermathecte. — There are four pairs of these organs situated in 

 segments 6, 7, 8, and 9 ; they are somewhat pyriform in shape, with 

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

 diverticulum wdiich lies to the inside ; the spermathecae open on to the 



Crytodrilus fldcheri. 



n, nepbvidial pores ; v.d.f, vas deferens funnel ; v.s, vesicula seminales ; cp, 

 spermatheciE ; t, testes ; o, ovary ; od, o-viduct ; oes, cesophageal glands. 



The oesopbagus bas been removed for tbe greater part ; in the 13tb segment 

 it bas been removed from 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 spermathecae the present species differs 

 from 0. rusticus, where there are two pairs of spermathecae each with 

 two or three short diverticula. 



Another curious fact about the present species is the difference of 

 minute structure between the spermatheca and its diverticulum. 

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



