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THE 
VOYAGE OF H.M.S. CHALLENGER. 
AOOWOGY. 
REPORT upon the Crivoipea collected during the Voyage of H.MLS. 
Challenger during the Years 1873-76. By fd epee CARPENTER, 
D.Sc., Assistant Master at Eton College. 
, 
PART I—GENERAL MORPHOLOGY, WITH DESCRIPTIONS 
OF THE STALKED CRINOIDS. 
PREFACE. 
Tur circumstances under which I have come to be charged with the duty of reporting 
upon the entire collection of Crinoidea made during the Challenger Expedition are as 
follows.—The researches of my father, Dr. Carpenter, C.B., F.R.S., early led me to take a 
special interest in Comatula and its allies. Some of his statements respecting the anatomy 
of the arms having been called in question, I was led to reinvestigate the matter towards 
the end of the year 1875, by methods which were almost unknown during the progress 
of his researches nearly fifteen years before ; and I had the pleasure of verifying all those 
points in his descriptions of the arms of the European Comatule which other observers 
had disputed. I was then working in the zoological laboratory of Prof. C. Semper 
at Wiirzburg, who most kindly placed at my disposal the arms of some tropical Comatulze 
which he. had obtained in the Philippines. It soon appeared that the minute structure of 
Crinoids offered a promising field for investigation, and Prof. Semper therefore generously 
put into my hands several specimens of aremarkable tropical Actinometra as material 
for a monograph of the type. This work occupied me during the whole of the year 1876 
(ZOOL. CHALL, EXP.—PART xxxiI.—1884.) a 
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