142 TRILOBITA. 



(1854), p. 146, and Brit. Palseoz. Foss. (1851), pi. i F, f. 13, 13 

 a, b, p. 155. Lower Llandovery ; Goleugoed, Myddfai. 



Another specimen, J. W. Salter, Organic Remains, dec. vn 

 (Mem. Geol. Survey, 1853), pi. 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. S. XLIV (1888), pi. 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 ibid, 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. Palseoz. Foss. (1855), p. iii. Ceraurus 

 clavifrons, F. McCoy, ibid. (1851), pi. i G, f. 9, [9 a is missing], 

 p. 154. Middle Bala; Cefn-grugos, near Llanfyllin. 



C. (Pseudosphaerexochus) moroides J. E. Marr and H. A. 

 Nicholson, Q. J. G. S. XLIV (1888), pi. xvi, f. 9, 10, 10 a, 

 p. 722. Skelgill 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. Palseoz. Foss. (1851), pi. i G, 

 f. 10, 10 a, p. 154. Middle Bala ; Rhiwlas. 



C. pengellyi, G. F. Whidborne, G. M. dec. 3, vi (1889), p. 29, and 

 Devonian Fauna S. Eng. (1889), pi. i, f. 11, 13, p. 8. Middle 

 Devonian ; Lummaton. 



C. (Eccoptochile) sedgwicki (McCoy), J. W. Salter, Mon. Brit. 

 Tril. (1864), pi. v, f. 17, p. 73. Gryphceus sedgwicki, F. McCoy, 

 A. M. N. H. ser. 2, IV (1849), p. 406, and Contrib. Brit. Pal. 

 (1854), p. 145. Eccoptochile sedgwicki, F. McCoy, Brit. Palaeoz. 

 Foss. (1851), pi. i F, f. 14, p. 155. Llandeilo Beds; three miles 

 North of Builth. 



