THE 



VOYAGE OF H.M.S. CHALLENOEE. 



ZOOLOGY. 



REPORT upon the Crinoidea collected during the Voyage of H.M.S. 

 Challenger during the Years 1873-76. By P. Herbert Carpenter, 



D.Sc., Assistant Master at Eton College. 



PART I.-GENERAL MORPHOLOGY, WITH DESCRIPTIONS 

 OF THE STALKED CRINOIDS. 



PREFACE. 



The 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 Comatida and its allies. Some of his statements respecting the anatom}' 

 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 Comatulse 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 Comatulge 

 which he had obtained in the Philippines. It soon appeared that the minute structure of 

 Crinoids oflferod a promising field for investigation, and Prof Semper therefore generously 

 put into my hands several specimens of a remarkable tropical Actinometra as material 

 for a monograph of the type. This work occupied me during the whole of the year 1876 



(ZOOL. CHALL. ESP. — PART XXXII. 1884.) a 



