ORGANS OF NUDIBRANCIIIATA. 



343 



forwards and opens in a very large, indefinitely shaped sac with 

 nmnerous outgrowths. Here, I take it, fertilisation is provided 

 for. The fertilising chamber opens to the exterior by means of 

 a wide tube. 



The receptaculum seminis is a large, thin-walled sac opening 

 into the vagina by means of a long, fairly wide tube. The slime 

 gland also enters the vagina. I'>ruel (6), in the case of Cali- 

 phylla, is of opinion that the fertilized eggs pass through the slime 

 gland — that there is a dennite path in this organ for the eggs. 

 I have carefull}- reconstructed this organ in Data, and it does 



Fig. 2. 



not seem probable that the eggs enter the slime gland ; at least, 

 there is no special path provided for them.* The lobes 

 are so intertwisted and branched that I give a separate 

 diagram of a reconstruction. The cells and the lobes of the 

 slime gland are of the typical cylindrical type, whereas those 

 of the two reservoirs into v.hich the secretion is poured are 

 flat. The ventral reservoir only has one, unbranched, secretory 

 lobe attached to it, and may perhaps be the albumen gland 

 [Eiweissdruse ; Bruel (6), p. 49.] The dorsal reservoir has 

 numerous lobes opening irto it. 



* See Bcrghia, p. 347. 



