PLATE XV. 



LLANDEILO FLAGS. 



Figs. 1 — 6. ^yygic- BuchU, Brongniart. 



1. „ „ Male form <?, Builth (Mr. Davies' cabinet), of the true 



convexity (most of the specimens are flattened). 



2. „ „ Specimen showing the labrum in situ. (Same cabinet.) 



3. „ „ Labrum. (Mus. Pract. Geology.) 



4. » ,, Portion of the striated upper border of the tail. 



5. „ „ Female form ? ; a variety with the dorsal tubercles con- 



spicuous. (Mus. Pract. Geology.) 



6. „ „ Female form ; a fine external cast. Presented to the 



Mus. Pract. Geology by R. Banks, Esq., of Kington. 

 Figs. 7, 8. Ofjygia ? ? (or Phacops) siibduplicata, Salter. Llandovery Rocks of 



Haverfordwest. (Cabinet of Mrs. Breawell, Brighton.) 



