PLATE XVI. 



LLANDEILO FLAGS OF BUILTH, RADNORSHIRE. 



Figs. 1 — 14. 0()ygia Corndensis, Murchison. Chiefly from the cabinet of Mr. 



Griffith Davies, of Cloudesley Street, Islington. 

 The smaller specimens (figs. 2 — 6) are from the 

 Shales of Trecoed, North of Builth, and are in 

 the Museum Pract. Geology. 



1. „ „ Male S form? with pointed head. Gil wem, near 



Llandrindrod. 



2. „ „ Young specimens, but with the full number of 



rings. Trecoed. 



3. 4. „ „ Distorted young specimens. Trecoed, Builth. 



The number of rings not quite certain. 



5. „ ., Very young state, with only six body-rings. 



6. „ „ Somewhat older, with seven rings. 



7. „ „ Half-grown specimen, the head has slipped over 



three of the body rings, and only five are visible. 



8. „ „ The originally figured specimen, from the Corndon 



Mountain, Shelve. (See ' Siluria,' pi. iii, fig. 4.) 



9. „ „ Very large specimen, showing impression of 



labrum, and the caudal fascia below. Gilwern. 



10. „ „ Young specimen, with labrum in situ. Gilwern. 



11. „ „ Full-grown female ? form, rounded at both ends. 



12. 13, 14. ,, „ Half-grown specimens. Gilwern. 



