TEMPORARY PREFACE. 



A larger number of species is dealt with in this volume than in the last, but as 

 many were procured in deep water, for instance, by Dr. Gwyn Jeffreys and Canon 

 Norman in Shetland, or captured under difficult circumstances, it has not been possible 

 to include so many coloured figures as could have been wished. Yet in this part 

 economically valuable forms, such as the Arenicolids and Spionids, brightly phospho- 

 rescent types like Ch&topterus, the most cosmopolitan of all the boring groups, viz. the 

 Polydorse and Dodecaceridse, the complex and physiologically interesting Magelona and 

 the Capitellida3, and, lastly, the numerous and peculiar family of the Maldanids, fall to 

 be considered. 



While some in this section lack beauty of coloration in contrast with the elegant 

 Phyllodocidse, they, for example, Ch&topterus and Magelona, surpass these in the remark- 

 able complexity of outline, or in special modification of internal structure. The coloured 

 figures by my late sister, Mrs. Albert Giinther, and those by Miss Walker, speak for 

 themselves. 



To my colleagues of the Old and the New World I am much indebted for many 

 valuable works and memoirs pertaining to the Marine Annelids, and especially of the 

 families now under consideration. Whilst a list of these will probably be given in the 

 final part, it is right now to record the loss which everyone interested in the group has 

 felt by the death of the veteran naturalist, Prof. Kinberg, of Stockholm. As a pioneer 

 his name is worthy of honourable remembrance along with those of Pathke, Grube, 

 George Johnston, De Quatrefages, Malm gr en, and Langerhans. 



The kind aid of Canon Norman and the late Dr. Gwyn Jeffreys in their dredging in 

 former years in the Zetlandic seas has again to be recorded. To Dr. Allen, of the 

 Plymouth Marine Laboratory, for southern specimens, to Prof. Arwiclsson, of Upsala, 

 for aid with the Maldanida3, to Mr. Southern for his courtesy in forwarding Irish 

 specimens, and to Mr. Arnold Watson for a coloured and other figures of Oivenia, my 

 special thanks are due. 



I have also, as on former occasions, to acknowledge the courtesy of the Librarians 

 of the Linnean, the Royal, and the Zoological Societies of London, of the British Museum 

 (Natural History), as well as that of the Librarians of the University of St. Andrews. 



My thanks are further due to Miss Ada H. Walker for her skilful and patient work 

 with pencil and brush. Unfortunately one or two forms were found to be British at the 

 last moment, and hence the illustrative figures were entered with difficulty in the plates, 

 whilst others have to be delayed for future publication. 



