PLATE XXI. 
Bi(3&-'. Fig. 1. Uraster spiniger, Wright. Under surface (reversed by the artist), magnified 
two diameters, from the Forest Marble near 
Road, Wiltshire. My collection, 'f'lt^ 
2. Stellaster Berth andi, WrigJd. Under surface, natural size. This beautiful 
form was collected from the " Calcaire a 
^ ^ • j^/^^ Entroques," Inferior Oolite, near Macon, 
fi^^ ^ by Professor Berthandi, of Macon, 
Saone-et-L6ire, France. My collection. 
3. AsTROPECTEN HooPERi, WHgld. The under surface of this Astropecten, which 
was collected from the Cornbrash at 
Horsington, Dorset, in 1828. The 
figure is a copy of a woodcut published 
in Loudon's 'Magazine,' vol. ii, p. 73. 
The specimen cannot be traced, and 
therefore the original drawing is repro- 
duced for this work. 
4. Ophiolepis Damesii, Wright. Under surface, magnified two diameters. My 
collection. 
5. — — — Upper surface of another specimen, magnified 
two diameters. Collected from the Avicida 
contorta beds at Garden Cliff, near West- 
bury, on the Severn. The first known 
ginal specimens were found in the Avicula 
contorta bed near Hildesheim, N. Ger- 
many, and the same species has since been 
found in the same horizon in England at 
two or three localities. 
