542 CRESSWELL SHEARER. 



end beneath the skiu, just over the division line of the seg- 

 ment to which they properly belong. The nephridia are 

 furnished with typical solenocytes, and their canals are defi- 

 nitely closed, and do not open into the primary body-cavity. 

 They are not ciliated, but the flagella o£ the solenocytes 

 beating down the length of the canals give them the appear- 

 ance of being ciliated. The presence of solenocytes in 

 Dinophilus is a pointof considerable morphological import- 

 ance on account of the relationship this worm shows with 

 lower forms, especially the Turbellaria. Their discovery in 

 Dinophilus, on the other hand, in the absence of our know- 

 ledge of their presence in lower forms may be held to indi- 

 cate close affinity with the more highly developed Annelids, 

 and especially the Polycheets. 



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