\ 
114 Dr. T. Wright on Fossil Echinoderms 
ness of the large tubercles on the upper surface, and their pre- 
sence on the interambulacrum, serve to distinguish this species 
from its congeners. 
Locality and stratigraphical position Found with S. Hof- 
manni in bed No. 4, the calcareous sandstone at Malta, where it 
is rare. The Maltese specimens we have seen are small, and do 
not exceed the dimensions given ; they are contained in the col- 
lections of the British Museum and the Geological Society. In 
Germany it is found in the middle tertiaries at ‘ Duberge bei 
Biinde, and at Astrupp bei Osnabriick.”” The admirable figure 
given by Goldfuss of this species is all that can be desired. 
Genus Eupatacus, Agassiz, 1847. 
Spatangoid Urchins, with a cordate or elliptical form, more or 
less depressed ; the petaloid portions of the antero- and postero- 
lateral ambulacral areas are wide; the single area is lodged in 
a shallow anteal sulcus, and the entire ambulacral star is closely 
surrounded by a broad well-defined peripetal fasciole, which 
undulates round its margin ; within this fasciolar space, the im- 
terambulacral plates carry very large perforated tubercles raised 
on crenulated bosses, and surrounded by wide smooth areolas, 
like those in the genus Spatangus. The heart-shaped shield, 
beneath the anal opening, is lkewise surrounded by a well- 
defined subanal fasciole. The basal portions of the postero- 
lateral ambulacra form broad, naked bands, between the poste- 
rior border and the mouth. The other characters resemble those 
of Spatangus, from which it differs however in possessing a pert- 
petal fasciole. 
Eupatagus De Koninckti, Wright, n. sp. 
Syn. Spatangus De Koninekii, Wright, Ann. of Nat. Hist. vol. xv. 
p- 178. 2 
The test of the original specimen of Eupatagus De Koninckit 
having had the external layer of its shell and consequently its 
-_fascioles denuded, we are now enabled to correct our determi- 
nation of this species from a specimen in the collection of the 
British Museum, in which these important parts of the anatomy 
of the skeleton are well preserved. For the description of this 
Urchin see our article Spatangus De Koninckii, to which we 
subjoin the following note :—The peripetal fasciole is rather 
broad, surrounding with little undulation the ambulacral star, 
and forming a well-defined boundary between that portion of 
the upper surface with large perforated tubercles, and that part 
with very small tubercles; the subanal fasciole heart-shaped, 
rather broad, and enclosing a shield-like space filled with larger 
* 
