PLATE XXI. 



Spondtlus (continued). 



Figs. 



1 — 5. S. striatus (Sow.). Rye Hill Sand, Warminster. (P. 119.) 



1. Museum of Practical Geology, No. 6836. a, left valve; b, anterior view. 



2. Woodwardiau Museum. Left valve. 



3. British Museum, a, left vah-e and projecting umbo of right ; b, posterior view. 



4. Wiltshire Collection, Woodwardian Museum. Right valve 'vvith only a small 



surface of attachment. 



5. York Museum. Left valve. 



6, 7. 8. serratus, Woods. (P. 124.) 



6. Dr. Blackmore's Collection. Uintacrinus-hAud of Marsupites zone, Devizes Road, 



Salisbury. Left valve, a, outline, natiu'al size ; b, x Ih ; c, ornament x 6. 



7. British Museum. Upper Chalk. Left valve, a, outline, natural size; b, x 1^; 



c, ornament x 4. 



