THE ANATOMY OF ONCHOLAIMUS VULGARIS, BAST. 133 



to the exterior, but iu wliicli fertilisation and a certain degree 

 of development also take place. 



The first portion is, as usual, termed "ovary," although this 

 term should strictly be applied only to the germinal syn- 

 cytium, and to the rhachis with the oogonia attached to it. 



TiixT-riG. 3. 

 rh. 



The second part is divided into oviduct, receptaculum seminis, 

 and uterus. The common portion is formed by the union of 

 the two tubes in the vagina. 



The ovarian region (text-figs. 3, 4, 5, 6, ov. r.) is by far the 

 largest; it extends from the end of the eighth to the tenth part 



Text- FIG. 4. 



of the body forward to the end of the fourth — i.e. it extends 

 through almost the entire reproductive region. It is, in addi- 

 tion, highly convoluted; in a specimen rendered transparent 

 with, e.g., cedar-w^ood oil the tightly-packed coils form a most 

 conspicuous object. The commencement is slightly conical, 

 the diameter increasing as we pass down, but after a compara- 

 tively short distance the diameter ceases to increase, the tube 

 being for the greatest portion of its length perfectly cylindrical. 

 The wall (PI. 8, fig. 26 a, gw.) is excessively thin, consisting 



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