6 
(Chthamalis) stellatus , Poli., is a form not uncommon in the 
Crags or later pleistocenes. It is often intermingled 
and confused with B. crenatus. In this last species, 
the valves are more regular at the base, in C. stellatus 
they are stellate or rayed. 
Darwin Foss. Bal. I., II., f. 2, d , figures a Crag specimen 
with some doubt as to whether it is a young form of B. 
bisulcatus var plicata. The form is, however, a very constant 
one and common. 
Coronula barbata , Darw. Middle lied Crag, Sutton and 
Bawdsey. 
,, diadema, L. Bed Crag, Suffolk, perhaps of Diestien 
origin. 
Verruca stromia , Mull. Crags and pleistocenes generally, 
common in Scotch deposits and Portrusli. 
Pyrgoma angliea , Sow. Coralline Crag, Bamsholt, mid¬ 
pleistocene Selsey (Beed Col ), Grove Ferry, Kent 
(see remarks on Bal. chisletianus). 
Pollicipes Hcarii. The name is given in the Cat. Mus. 
Practical Geologj 7 , London, as a pleistocene species, 
but without any further details 
Scalpellam magnum , Wood, Coralline Crag. 
„ vulgare , mid-pleistocene, Selsey (Beed Coll.) 
The majority of the later Tertiary Echini are still unknown 
in a living condition : for, omitting as doubtful species two 
solitary examples, Ag issizia and Echinolampas , and the varieties 
of Echinocyamus , we find that there are 19 or 20 extinct species 
to 10 recent ones. The starfishes on the other hand are still 
living mostly in northern seas. It was to he expected that in 
the course of the numerous deep sea dredgings, this disparity 
might have been reduced, hut contrariwise the investigations of 
Dr. W. J. Gregory from whom I have been reluctantly 
constrained to differ in some instances, have tended to increase 
the original disproportion. 
Crinoidea. 
Antedon (Comatula) Brownii, E. F., A. Woodwardi, E. F. and 
A. Hansomii, all Coralline Crag; the latter also 
occurs in the basal Crags at Walton Naze. It is 
very doubtful if the few Ossicles found justify so 
many species. 
