ON THE NEPHEIDIA OF THE POLYCHJLTA. 439 



On the Nephridia of the Polychseta. 



Part II. — Glycera and Gouiada.^ 

 By 



Edwin S. Ooodricli, B.A., 



Aldiicliiau Demonstrator of Comparative Anatomy, Oxford. 



Witli Plates 32—35. 



In the (ullowiiij^ pages are described the nephridia and 

 " ciliated organs " of the two closely allied genera, Glycera 

 and Goniada. The observations on the first genus were begun 

 on fresh and preserved material obtained at Naples in 1896 

 and 1898, where I examined the three common species, 

 Glycera unicornis, Sav., Gl. siphonostoma, D. Ch., and 

 Gl. convolutus, Keferst, continued ou the coast of Nor- 

 mandy, Avhere Gl. convolutus is fairly abundant, and com- 

 pleted here in Oxford. Unfortunately I have not been able to 

 obtain living specimens of the genus Goniada, and the work on 

 this form has beeu therefore entirely carried out ou preserved 

 specimens of the species G. emerita. And. and Edw., and G. 

 maculata, Oerst.^ 



To Dr. Lo Bianco I am indebted for a fine specimen of the 

 rare Goniada emerita, to Prof. Beuham for a ripe specimen 

 of G. maculata, and to Dr. Levinsen, of Copenhagen, Dr. 



' Part I is published iu vol. 40 of this Journal (1897), and contains an 

 account of the nephridia of Nephthys. 



"^ I am glad to have the opportunity of thanking Professor Dolirn for 

 generously placing- a table at my disposal last winter iu the Stazione 

 Zoologica, and to Professor Perrier for the kind way in which he received 

 me in his laboratory near St. Vaast-la-Hougue last summer. 



