*2 THE VOYAGE OF H.M.S. CHALLENGER. 
3. The Copenhagen Museum (Dr. Ch. Liitken). 
4. The Kiel Museum (Prof. K. Mobius). 
5. The British Museum (Dr. A. Gunther and Prof. F. Jeffrey Bell). 
6. The Dutch Arctic Expedition of S.S. “Willem Barents,” 1880-1881 (Kon. 
zool. Genootschap Nat. Art. Magistra, Amsterdam). 
7. The Norwegian Arctic Expedition (Bergen Museum, Dr. A. Hansen). 
8. The Leyden Museum (Prof. A. A. W. Hubrecht). 
9. The private collections of Messrs. P. H. Carpenter, A. Agassiz, K. Mobius, E. 
Hseckel, and J. W. Spengel. 
The most abundant and interesting material was obtained from Nos. 1-4. 
I have indicated roughly the locality and also quoted the number of the Stations at 
wdiich the different species collected during the Challenger and “ Blake ” Expeditions 
were found, since all the details are contained in the published lists of Stations of these 
two expeditions 1 ; moreover, the geographical distribution of the Myzostomida being 
connected with that of their hosts, the Report on the Crinoidea, shortly to be published, 
will furnish the necessary information. 
The names of the hosts new to science were communicated to me by Mr. Herbert Car- 
penter from his MSS. Finally, I wish to state that, following the suggestion of Dr. v. 
Willemoes Suhm, 2 I examined the figures of fossil Crinoidea in palaeontological literature, 
as well as the actual fossils contained in the Munich collection, in order to find out, if 
possible, traces of Myzostomida, and was rewarded by discovering the cysts of the para- 
sites upon the stalks of fossil Pentacrini. I intend to continue these investigations, and 
should feel very grateful if those gentlemen who have at their disposal collections of fossil 
Crinoidea would be so kind as to inform me if they notice any appearances like those 
drawn on Pis. XI-XY. of this work. 
Aschaffenburg, October 1, 1883. 
1 Appendix to the Introduction to the Zoological Reports, Zool. Chall. Exp., vol. i. ; also, Narrative of the 
Cruise, vol. i. — List of Dredging Stations occupied by the United States Coast Survey Steamers “ Corvin,” “ Bibb,” 
“ Hassler,” and “ Blake,” from 1867 to 1879. Benjamin Pierce and Garble P. Patterson, Superintendents of the Coast 
Survey, Bull. Mus. Comp. Zool., Cambridge, Mass., vol. vi., No. 1, 1879. 
2 Von der Challenger Expedition, Brief VI., Zeitschr. f. wiss. Zool., Bd. xxvi., 1876, p. lxxix. 
