PREFACE. xl 
I have to thank the Carnegie Trust for their liberality in subsidising the coloured 
plates throughout the work. Without such aid it would have been impossible to have 
completed the task within a reasonable time. To the Royal Society I am also indebted 
for various grants in aid of the plates, and to Lord Rothschild for his generous help. 
I have, further, to acknowledge the skilful and patient labours of Miss Ada H. 
Walker, who for many years has, with rare ability, drawn the annelids from life and 
represented the typical structures under the microscope. She has worthily followed in 
the steps of Col. Montagu’s niece, Miss D’Orville, the beauty of whose coloured drawings 
of Sabellids in the manuscript volume in the Linnean Society (e.g. Plates 19 and 20) can 
hardly be exceeded, and of my sister, whose exquisite early drawings encouraged me to 
take this work in hand. It has to be remembered in connection with the drawings of 
some of the bristles that the very minute spines are sometimes invisible after preservation, 
and so with the cilia on most organs. 
To the Council of the Ray Society I owe that generous support which has, during 
almost sixty years, been a source of sincere satisfaction. Finally, to the various secretaries 
of the Ray Society, the late Dr. Wiltshire and the late Mr. Hopkinson, and to Dr. Calman, 
the present secretary, | am indebted for much valued criticism and aid in the revision of 
the text and in references to the literature of the subject. 
Wo Go Shit 
Garry Marine Laporarory, 
St. ANDREWs ; 
September 30th, 1922. 
The Council of the Ray Society have again to express their gratitude to the 
Carnecin Trust FoR THE UNIVERSITIES OF ScoTLAND and to Prof. McIntosh, who have 
generously contributed to the cost of producing the final part of this work. 
The thanks of the Council are also due to Mr. G. A. Smith, who voluntarily under- 
took the tedious labour of compiling a complete index to the names and synonyms 
mentioned in the whole work, and who has also prepared a bibliographical collation of the 
parts in which it has been issued, giving the dates of publication as exactly as it is now 
possible to ascertain them. 
Finally, the Council believe that they are interpreting the feelings of the members 
of the Society in offering to their President congratulations on the completion of this 
Monograph, of which the first part was published no less than half a century ago. 
March 16th, 1923. 
