PREFACE. 



opportunity of examining specimens obtained by him- 

 self in the course of his extended dredgings. 



Mr. J. Gwyn Jeffreys has kindly supplied me with 

 a quantity of zoophytes procured during one of his 

 famous Shetland cruises, amongst which were one or 

 two most beautiful species new to science. 



Mr. C. W. Peach, who was a valued contributor to 

 Dr. Johnston's ' History,' and who is an enthusiastic 

 worker still, has come to my assistance with an ample 

 list of habitats, and has also contributed some inter- 

 esting specimens. 



My acknowledgments are further due to Professor 

 Wyville Thomson for some exquisite drawings which 

 have been engraved for this work ; to Dr. Collingwood 

 for a list of the zoophytes found in the neighbour- 

 hood of Liverpool, and notes on some of the species ; 

 to my friend Mr. E. W. H. Holdsworth for his 

 interesting observations on Cladoncma ; to Mr. George 

 Hodge for the use of figures and the communication 

 of specimens ; to Mr. Leipner for some very skilfully 

 mounted specimens of Campanularian and other zoo- 

 phytes; and to Mr. G. S. Brady for Hydroida obtained 

 in Connemara. 



I have also to thank Professor Sars and Professor 

 Van Beneden for their great courtesy and kindness in 

 forwarding to me copies of their publications. 



In the preparation of the plates I have had the zea- 

 lous cooperation of Mr. Tuffen West, who has spared 

 no pains in the execution of the engravings, and whose 

 practical acquaintance with the subjects delineated, 



