152 TRILOBITA. 



Palaeoz. Foss. (1851), pi. i F, f. 12, p. 154. Coniston Limestone ; 

 Applethwaite Common. 



Sphaerexochus mirus, Beyrich, J. W. Salter, Mon. Brit. Tril. 

 (1864), pi. vi, f. 6 g, p. 76. Wenlock Limestone; Malvern. 

 Fletcher Collection. 



Staurocephalus murchisoni Barrande, F. McCoy, Brit. Palaeoz. 

 Foss. (1851), pi. i F, f. 15, 15 a, p. 153. J. W. Salter, Mon. 

 Brit. Tril. (1865), pi. vii, f. 19, p. 84. Middle Bala; Rhiwlas. 



Tretaspis fimbriatus, v. Trinucleus fimbriatus. 

 Trinodus agnostiformis, v. Agnostus agnostiformis. 

 T. tardus, v. Agnostus agnostiformis. 



Trinucleus concentricus (Eaton). T. gibbifrons, F. McCoy, A. 

 M. N. H. ser. 2, IV (1849), p. 411, and Contrib. Brit. Pal. 

 (1854), p. 149, and Brit. Palseoz. Foss. (1851), pi. i E, f. 14, 

 14 a, p. 145. Llandeilo Beds; Golden Grove, Llandeilo. This 

 specimen cannot be found. 



T. etheridgei, H. Hicks, Q. J. G. S. xxxi (1875), pi. ix, f. 6, 

 p. 182. Llanvirn Beds; Llanvirn Quarry. Presented by Dr 

 H. Hicks. 



T. fimbriatus, Murchison. Tretaspis fimbriatus, F. McCoy, 

 Brit. Pakeoz. Foss. (1851), pi. i E, f. 16, 16 a, p. 146. Llandeilo 

 Beds ; Pencerrig, near Builth. 



T. gibbifrons, v. Trinucleus concentricus. 



T. ramsayi, H. Hicks, Q. J. G. S. xxxi (1875), pi. x, f. 2, p. 183. 

 Upper Arenig ; Porth-hayog. Presented by Dr H. Hicks. 



Trochurus nodulosus, v. Lichas nodulosus. 

 Zethus atractopyge, v. Cybele verrucosa. 

 Z. rugosus, v. Cybele rugosa. 

 Z. sexcostatus, v. Encrinurus sexcostatus. 



