TRILOBITA. 149 
Ogygia peltata, J. W. Salter, Mon. Brit. Tril. (1867), pl. xxv*, 
f.1, 2,4, p.177. Middle Arenig; Whitesand Bay. 
O. radians, v. Barrandia radians. 
Olenus (Spherophthalmus) expansus, Salter, Cat. (1873), p. 12. 
Upper Lingula Flags ; Moel Gron. 
O. planti, Salter, Cat. (1873), p. 11. Upper LInngula Flags ; 
Moel Gron. Presented by J. Plant, Esq. 
Paradoxides harknessi, H. Hicks, Q. J. G. 8S. xxvu (1871), 
pl. xv, f. 9, 10, 11, p. 399. Harlech Beds; St Davids. 
Presented by Dr H. Hicks. 
P. hicksi, Salter, H. Hicks, Q. J. G. S. xxv (1869), pl. in, f. 1 6, 
2, 10a, p. 55. Menevian Beds; Pen-pleidiau, St Davids. 
Presented by Dr H. Hicks. 
Phacops (Acaste) alifrons, J. W. Salter, Appendix to F. McCoy, 
Brit. Palaeoz. Foss. (1855), p. u. F. McCoy, ibid. (1851), pl. 1G, 
f. 12—14, p. 159. J. W. Salter, Mon. Brit. Tril. (1864), pl. 1, 
f. 31, 32, p. 33. Middle Bala; Capel Garmon, and Pont-y-Glyn. 
P. (Acaste) apiculatus, J. W. Salter, Appendix to F. McCoy, 
Brit. Palzoz. Foss. (1855), p. m1. Portlockia? apiculata, F. 
McOoy, ibid. (1851), pl. i G, f. 17--19, p. 162. Middle Bala ; 
S. W. of Pwllheli, Glyn Ceiriog, and Rhiwargor. 
P. (Chasmops) conophthalmus (Boeck ?), J. W. Salter, Organic 
Remains, dec. vil, art. 1, (Mem. Geol. Survey, 1853), p. 11, 
and Mon. Brit. Tril. (1864), pl. iv, f. 25, pl. vi, f. 25, p. 40. 
Chasmops odini? (Hichwald), F. McCoy, Brit. Palzeoz. Foss. 
(1851), pl. ia, f. 22, 23, p. 164. Middle Bala ; Llansantffraid. 
P. (Acaste) downingie (Murchison), J. W. Salter, Organic 
Remains, dec. vir (Mem. Geol. Survey, 1853), pl. i, ff 2, 3. 
Wenlock Limestone; Dudley. Fletcher Collection. These 
specimens cannot be identified. 
P. (Acaste) downingie (Murchison) var. cuneatus, J. W. 
Salter, Mon. Brit. Tril. (1864), p. 28, woodcut 8. Denbigh- 
shire Grits ; Moel Seisiog, Llanrwst. 
P. elegans (Boeck and Sars), J. E. Marr and H. A. Nicholson, 
Q. J. G. 8. xiv (1888), pl. xvi, f. 1—3, p. 720. Skelgill Beds; 
figs. 1, and 3, zone of Phacops glaber, Skelgill: jig. 2, zone 
