EXPLANATION OF THE PLATES. 45 
Dalquharran, Craighead ; as well as in other localities of the Girvan Val- 
ley, Ayrshire.” Brit. Sil. Brach., p. 112. 
Fig. 10.—a, b. RuHYNCHONELLA LLANDOVERIANA, Davidson, sp. 
Atrypa serrata, Sil. Foss., Irel., p. 41.  Rhynchonella, Cat. Brit. Foss. 
(1854), p. 147. BR. Llandoveriana (Dav.), Sil., 3rd ed., p. 527. 
a. b. Original. Internal casts in greenish sandstone, weathering to a rusty 
brown ; from Maume, Co. Galway. Mus. G. S. I. 
LLANDOVERY.—Sil., 4th ed., p. 527. Upper Llandovery, Damory Bridge, 
Tortworth; Mus. G.S. I. In Scotland, it occurs at Saugh Hill, near 
Girvan, Ayrshire. In Ireland, it is abundant at several localities in the 
sandstones near Cong and other places in the county of Galway. Sil. 
Foss,, Irel., p. 41. Brit. Sil. Brach., p. 184; and Mus. G. §. I. 
