No. 163.] 



17 



LOWER SILUEIAN. 



Lingula flags. 



do 



*LlNGULA PHILLIPSII, 



Aberciddy bay. 



*Bellerophon perturbatus, 

 Aberciddy btxy. 



DiDYJiOGRAPHUs PERSCULPTUS, Lower Silurian ( Bala beds?) 1 slab 

 Gogofan. 



Orthis calligramma, var. virgata, do 



Anglesea. 



* — FLABELLULTJM, 



Llyn Ogwen. 



* — VESPERTILIO, 



Bala. 



* — ACTONI^, 



Chair of Kildare. 



*LEPT.iENA SERICEA, 

 Bala. 



— sp. 1, 



Cerrig y druiddon. 



* — OBLONGA, 



Chair of Kildare. 



Strophomena expansa, 

 Bala. 



— SPIRIPEROIDES, 



Bala. 



* — sp. 1, 



Haverford west. 



*TEREBaATULA MARGINALIS, 

 Chair of Kildare. 



Spiriper biforattis, 



Chair of Kildare. 



*Serpulites sp. 1, 

 Bala, 



*NlTIDULTJS PAVUS, 



Haverford-west. 



POLYZOA, 



Chair of Kildare. 



Ketepora, 



Chair of Kildare. 



Ogygia bfchii, 



Llandeilo flags. 



do 

 Lower Silurian. 

 Llandeilo flags. 



do 

 Lower Silurian. 



do 



do 



do 



do 

 , do 

 Llandeilo flags. 



do 

 Lower Silurian. 



do 

 Llandeilo flae-s. 



Rhiw Rhewyeh Pencerrig, Trecoed and Carneddan Builth. 



Ampyx nudus, Llandeilo flags. 



Pencerrig and Builth. 



ASAPHUS tyrannus, do 



Llandeilo, Dynevor park. 



[ Assembly, No. 163.] 3 



( 1 cast in plaster). 4 



