OBSEP.VATION OX FRESH WATER, POLYZOA. 117 



7. Ovary and Testis. 



Pcct'niafdhi qchitinn^a has a distinct ovary, although it devolopes 

 only in verv rare instances. AV'hen present, it is situn,te<l inside the 

 cystid near its tip on the oi-al side. It is a solid clnh-shaped 

 ontoTowth of the internal lining epithelium, and nsnally contains ten 

 or more ova in different stages of development (fig. 33, PI. XIX), 

 the space between them being filled with connective tissue stroma. 

 Ripe eggs can fall into the perigastric cavity only by the rapture of 

 the ovarian wall. The largest ovarian (ninn measured 0.35 mm. 

 The length of the ovary is about 0.9 mm., and the breadth 0.5 mm. 

 Xo doubt can ever be entertained about the ovarian nature of the 

 b(jdy in question. Tiiat the funiculus has nothing to do with the 

 production of eggs has also been ascertained by Braem f)r Crisfafella 

 and PlumateUa. 



As to the testis, my investigations gave no result. I searched fu- 

 it in hundreds of polypides, but in vain. I once saw son^.ething like 

 spermatozoa within the tip of a cystidal branch, l)ut I filled to make 

 it sure. At any rate, true sexual organs are very imperfectly deve- 

 h^ped in accordance with their secondary importance in the reproduc- 

 tion of this species. 



8. Funiculus. 



The funiculus is a hollow tubular organ, about 5-6 mm. long, 

 whieh Connects the blind end of the stomach with an o))posite })oint 

 of the cystidal wall. Its wall is composed of three layers, but the 

 innermost one, consisting of a few longitudinal muscular fibres, 

 hardly deserves to be called a layer (fig. 32, PI. XIX). The outer- 

 most layer is the continuation of the outer lining of the alimentary 

 canal or the lining epithelium of the endocyst, from either of which 



