ECHINODEllMA — STAE-EISHES. 
G9 
Herefordshire, have furnished a large number of starfishes Gallery 
belonging to the genera Palasterina (Fig- o2 b), Sturtzaster, VIH- 
lihopalocoma, and Bddlaconia. Some obscure starfishes have 
been found in the Lower Devonian slates of Cornwall, but 
the fossils of this age are better studied in the beautiful Upright 
series from Bundenbach . in Brussia. In these the skeletons case^A2, 
are altered into iron pyrites and imbedded in black slate, 
which has been cleaned away from them with most delicate 
care by Mr. B. Stiirtz, the original desciiber of many of 
these specimens (see “ Palaeontographica ” 1886, 1890, and 
other yjapers mentioned on the labels). Palacasleriscus, 
CheiropteroAiter, and Helianthaster may be mentioned, but all 
are beautiful and interesting. 
lieturning to the British series, we find some good speci- Table-case 
b 
Fig. .32. — Palseozoic Starfi.shes. a, Schiichcrtia sfellata, from the Ordo- 
vician of Ottawa ; under surface with grooves and mouth, b, Palas- 
terina jyrwixva, Upper Silurian of Kendal; upper surface. 
mens of Jurassic star-fish, notably Tropidader from the 
Middle Lias, a massive Pentcupmmter Sharpi from the North- 
ampton Ironstone, a heautifully preserved Astcrias Gavcyi and 
Bolaster Morctoitis from the Great Oolite. Astropcctcn is repre- 
sented by species of various ages from Bajocian to Corallian, 
and some larger s])ecimens of it are in Wall-case 17. 
Cretaceous Asteroidea are best shown in the e.vcellent Table-eases 
series from the English Chalk, which have been described 30&29. 
by W. B. Sladen and W. K. Spencer in a monograph of the 
Balaeontographical Society. Here the tesselated Calliderma 
Bmithi and the fine group of Pentaecros bulhifcrus are 
specially worth notice. 
The Tertiary star-fish are represented chiefly by Pen- Table-ease 
tayonasfer and Adropeeten from the London Clay, preserved' 
in a pyrites that is regrettably liable to decompose. 
