THE 
VOYAGE OF H.M.S. CHALLENGER 
ZOOLOGY. 
REPORT on the Polyzoa collected by H.M.S. Challenger during the 
years 1873-76. By George Busk, F.R.S., Y.P.L.S., &c. 
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PART I.— THE CHEILOSTOMATA. 
INTRODUCTION. 
When at Sir Wyville Thomson’s request I undertook the description of the Polyzoa 
collected on the Voyage of the Challenger, I had formed no idea of the extent 
of the task I had imposed on myself, nor of the time, amidst other engagements, 
that would be required for its due execution, which I can only regret has been so 
protracted. 
One result of the delay in publication has necessarily been to diminish to a con- 
siderable extent the originality of my Report, as regards the introduction of new species. 
More especially during the last eight or nine years the number of workers in all parts 
of the world in the subject of the Marine Polyzoa has been much increased, with, of 
course, a corresponding addition to the number of new species. As amongst these there 
are many that I had previously noticed in the Challenger Collection, and to which, in the 
progress of my work, I had assigned names, which were unfortunately appended to the 
Plates as they were printed off, it became necessary to make the numerous changes 
of nomenclature which will be noticed in the Explanations of the Plates. 
(ZOOL. CHALL. EXP. PART XXX. 1884.) Gg rt 
