56 BRACHIOPODA. 
pl. xvi, f. 3, 3 a, p. 311, and Brit. Foss. Brach. m1, part vi 
(1871), pl. 1, £ 21, 21 a, p. 341. Menevan Beds ; St Damids. 
Obolus ? plumbeus (Salter) var. plicatus [Hicks MS.], T. David- 
son, Brit. Foss. Brach. 11, part vii (1871), pl. 1, f. 22, 22 a, 
p. 342. Tremadoc Beds; Tremaenhir, St Davids. The 
specimen does not agree well with the figure. 
Orthis alternata, Sowerby, T. Davidson, Brit. Foss. Brach. v 
(1883), pl. xiv, f 2—6, p. 187. Middle Caradoc ; Horderley. 
O. alternata var. retrorsistria, v. Orthis retrorsistria. 
O. budleighensis, T. Davidson, Brit. Foss. Brach. Iv (1881), 
pl. xl, f 20, 20 a, p. 358. Budleigh Salterton Pebble Bed. 
This specimen is missing. 
O. calligramma, Dalman, var. scotica (McCoy), T. Davidson, 
Brit. Foss. Brach. 11, part vii (1869), pl. xxxv, f. 20, 20 a, 6, 
p. 240. Orthisina scotica, F. McCoy, A. M. N. H. ser. 2, vil 
(1851), p. 400, and Contrib. Brit. Pal. (1854), p. 222, and Brit. 
Paleeoz. Foss. (1852), pl. i u, f. 29, 29 a, b, p. 232. Middle 
Bala; Craig Head, Ayrshire. 
O. calligramma, Dalman, var. calliptycha, F. McCoy, Brit. 
Paleoz. Foss. (1852), p. 215. Middle Bala ; Llansaintfradd. 
O. crispa, F. McCoy, Brit. Paleoz. Foss. (1855), pl. 1 H, f. 43, 
43 a,b, p. 216. Middle Bala; Bala. 
O. filosa, v. Strophomena filosa. 
O. flabellulum, Sowerby, T. Davidson, Brit. Foss. Brach. 11, 
part vii (1869), pl. xxxiv, f. 12 a, p. 248. Bala Beds; Boduan, 
Carnarvonshire. 
O.? hirnantensis, F. McCoy, A. M. N. H. ser. 2, vir (1851), 
p. 395, and Contrib. Brit. Pal. (1854), p. 217, and Brit. Palzeoz. 
Foss. (1852), pl. iu, f. 11, 11 a—e, p. 219. T. Davidson, Brit. 
Foss. Brach. 11, part vii (1869), pl. xxxu, f. 5—7, p. 261. 
Hirnant Limestone ; Maes Hir and Aber Hirnant. 
O. interlineata, J. de C. Sowerby, Trans. Geol. Soc. ser. 2, V 
(1840), pl. lil, f 11, pl. liv, f 14. Atrypa striatula, J. de 
C. Sowerby, ibid. (1840), pl liv, f. 10. Upper Devonian ; 
Petherwin. 
