392 
LAMPLUGII : BURIED CLIFF AT SEWERBY. 
its old place at the Wold-foot, Holdemess, that relic of the ice-age, 
is gradually vanishing, and its clays and gravels are somewhere going 
to make the foundations of a newer land, 
REFERENCES TO PLATE No. 21. 
A. Old Beach, C. Blown Sand. X. Old Chalk Cliff. 
B. Rain Wash. S. Slipped Drift. Q. Bridlington Quay. 
(About one mile distant, South- West.) 
NOTE ON A FOSSIL SPECIES OF CHLAMYDOSELACHUS. 
BY JAMES W. DAVIS, F.G.S., ETC. 
Some years ago a Selachian was obtained by Prof. H. A. Ward, 
which had been caught off the coast of Japan. It was purchased 
for the Museum of Comparative Zoology at Harvard College ; and 
in January 1884 Mr. S. Carman, of that Museum, gave a preliminary 
description of the fish in the Bulletin of the Essex Institute," 
vol. xvi., in which he recognized it as belonging to a new family 
and instituted for it the genus Chlaniydoselachus. 
I had the pleasure of describing this fish and giving a historical 
resume of the various opinions respecting it in tlie proceedings of 
this society, at a meeting held in 1885.''' Until the month of June in 
the present year, no fossil representative was known. Whilst visiting 
the Natural History Museum at 'South Kensington, I came across a 
fossil representative of the genus closely resembling the recent one. 
It is extremely interesting to find that ten years ago a fossil 
representative of Chlamydoselachvs was actually discovered and figured 
by the late Robert Lawley. The specimen is from the Pliocene beds 
of Orciano in Tuscany, and is described as very rare ; tlie teeth 
figured are possessed of three sharp, slender, backwardly-curved 
denticles, with a base forming a broadly-expanded plate divided at 
its posterior extremity into a pair of prongs, which doubtless 
extended, as in the existing species, beneath the succeeding tooth, 
thereby gaining additional firmness and strength. The figures 
indicate a tooth twice the diameter of the anterior teeth of the 
existing species. The author knew of no living or fossil representa- 
tive of the teeth, and gave the figure with a short notice, without 
* Proc. Yorksh. Geol. and Poly t. Soc., vol. ix., p. 98. 
