142 TRILOBITA. 
(1854), p. 146, and Brit. Palzeoz. Foss. (1851), pl. 1 F, f. 13, 13 
a, b, p. 155. Lower Llandovery ; Goleugoed, Myddfat. 
Another specimen, J. W. Salter, Organic Remains, dec. VII 
(Mem. Geol. Survey, 1853), pl. ii, f. 5. Wenlock Limestone ; 
Dudley. Fletcher Collection. The specimen in the collection 
does not agree well with the figure. 
Cheirurus bimucronatus (Murchison) var. acanthodes, J. E. 
Marr and H. A. Nicholson, Q. J. G. 8. xxiv (1888), pl. xvi, 
f.7, 8, p. 722. Skelgill Beds (zone of Phacops glaber); Skelgill. 
Presented by J. E. Marr, Esq., F.R.S. 
C. clavifrons, v. Cheirurus juvenis. 
C. frederici, J. W. Salter, Appendix to A. C. Ramsay, Geol. North 
Wales (1866), p. 322, woodcut 10, and zbid. second edition 
(1881), p. 520. Upper Tremadoc; Garth, Portmadoc. Pre- 
sented by D. Homfray, Esq. 
C. juvenis, Salter. C. clavifrons (Dalman), J. W. Salter, Appen- 
dix to F. McCoy, Brit. Paleoz. Foss. (1855), p. ui. Ceraurus 
clavifrons, F. McCoy, ibid. (1851), pl. ia, f. 9, [9 a is missing], 
p. 154. Middle Bala; Cefn-grugos, near Llanfyllin. 
C. (Pseudospherexochus) moroides, J. E. Marr and H. A. 
Nicholson, Q. J. G. S. XiIv (1888), pl. xvi, £9) Oy Gee. 
p. 722. Skelqill Beds (zone of Phacops glaber); Skelgill. 
Presented by J. E. Marr. Esq., F.R.S. 
C. (Actinopeltis) octolobatus (McCoy). Ceraurus octolobatus, 
F. McCoy, A. M. N. H. ser. 2, Iv (1849), p. 407, and Contrib. 
Brit. Pal. (1854), p. 146, and Brit. Palzeoz. Foss. (1851), pl. i 4, 
f.10, 10 a, p. 154. Middle Bala ; Rhiwlas. 
C. pengellyi, G. F. Whidborne, G. M. dec. 3, v1 (1889), p. 29, and 
Devonian Fauna 8. Eng. (1889), pl. i, f. 11, 13, p. 8 Middle 
Devonian ; Lwmmaton. 
C. (Eccoptochile) sedgwicki (McCoy), J. W. Salter, Mon. Brit. 
Tril. (1864), pl..v, £17, p. 738. Crypheus sedgwicki, F. McCoy, 
A. M. N. H. ser. 2, Iv (1849), p. 406, and Contrib. Brit. Pal. 
(1854), p. 145. Hecoptochile sedqwicki, F. McCoy, Brit. Palzeoz. 
Foss. (1851), pl.i F, f. 14, p. 155. Llandeilo Beds; three miles 
North of Builth, 
