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XXVIII. On a new Crinoid from the Southern Sea. 
By P. Herbert Carpenter, M.A., Assistant-Master at Eton College. 
Communicated by William B. Carpenter, C.B., M.D., F.R.S. 
(Published by permission of the Lords Commissioners of the Treasury.) 
Received March 15,—Read April 12, 1883, 
[Plate 71.] 
Towards the end of last year I received from Mr. Murray a small collection of 
“ Challenger ” Comatulce which had been retained by the late Sir Wyville Thomson, 
and was found among his other collections after his death. It included several dupli¬ 
cates of forms already known to me, among them being three fairly perfect specimens 
of a type which I had only been able to study from a mutilated calyx. There were 
also eight or nine new species of Antedon , all from stations which had already 
yielded Comatulce, two of them abundantly so. Lastly, there was an apparently 
insignificant little specimen from a depth of 1,800 fathoms at Station 158 in the 
Southern Sea.* It has five simple arms, and appeared at first sight to be merely 
a young individual of Eudiocrinus semperif which was dredged at Stations 164 
and 169. Upon closer examination, however, I found that the specimen, although 
a true Comatidci, and resembling Eudiocrinus in having but five arms, presents two 
characters which occur in no other Neocrinoid. In fact it is only among some of the 
older Palseocrinoids that similar features are to be met with, and I have no hesitation 
in saying that this is by far the most remarkable of all the Crinoids obtained by any 
of the recent deep-sea exploring expeditions. 
Under these circumstances I propose to distinguish the type by the generic name 
Thaumatocrinus,\ with the specific designation renovatus. 
* Station 158, March 7, 1874, lat. 50° 1' S., long. 123° 4’ E.; depth 1,800 fathoms ; bottom tempera¬ 
ture 3° C., Grlobigerina-ooze. The only other Comatula obtained at this station was Promachocrinus 
abyssorum, 
t This is the Ophiocrinus semperi of my preliminary report (Proc. Roy. Soc„ Ro, 194, 1879, p. 385). 
Owing to the previous employment of Ophiocrinus by Salter and also by Angelin, I have proposed 
Pudiocrinus for the recent type to which this name was given by Semper (Journ. Linn. Soc. Zool., 
vol. xvi., p. 493). 
f Oxv/ix, a marvel. 
6 B 2 
