TRTLOBITA . 57 



Proetus, sp., Salter, 1873. Silurian, Braes E. of Girvan ; "Wenlock, 



Tortworth, Dudley, and Ledbury. 

 Proetus, sp., Salter, 1873, Cat. Camb. & Sil. Foss. pp. 86 & 133. 



PSILOCEPHALUS, Salter, 1866. 



Psilocephalus, Salter, 1866, Mon. Pal. Soc. p. 175. 

 Distribution. Silurian. 



Psilocephalus inflatus, Salter, 1866. Lower Tremadoc, N.W. of 



Peumorfa ; Upper Beds, Trwyn Cae lago, Portmadoc Harbour. 



Psilocephalus injlatun, Salter, 180(3, App. Eanipar, Geol. N. Wales, Mem. 



Geol. Surv. vol. iii. p. 316, woodcut, lig. 8 ; Salter, 1806, Mon. Pal. Soc. 



pt. 3, p. 175, woodcut 41. 



Psilocephalus innotatus, Salter, 1866. Lower Tremadoc beds of 



Penmorfa. 

 Psilocephalus innotatus, Salter, 1866, App. Ramsay, Geol. N. 'N^'^ales, Mem. 

 Geol. Surv. vol. iii. p. 315, pi. vi. figs. 9-12; Salter, 1866, Mon. Pal. Soc. 

 pt. 3, pi. XX. figs. 13-19. 



EEMOPLEmilDES, Portlock, 1843. 



Pemopleurides, Portlock, 1843, Rep. Geol. Tyrone, p. 154 ; Emmrich, 1845, 

 Neues Jahib. p. 45; M'Coy, 1846, Synops. Sil. Foss. Ireland, p. 43; 

 Saltei', 1853, Geol. Surv. Decade vii. ; Salter & H. Woodw. 1865, Oat. & 

 Chart Foss. Crust, p. 12; Etheridge, Morris, and Jones, 1867, App. 

 Murch. Sil. p. 521. 



Amphitrpon, Corda, 1847, Prodr. bohm. Tril. 



Cuphyra, Barrande, 1853, Syst. Sil. Boheme. 

 Distribution. Upper Cambrian and Lower Silurian. 



Semopleurides Colbii, Portlock, 1843. Lower Silurian, Desertcreat, 



Tyrone ; Bala Limestone, N. Wales. 

 Semopleurides Colbii, Portlock, 1843, Rep. Geol. Tyrone, p. 250, pi. i. fig. 1 ; 

 Salter, 185-3, Geol. Surv. Decade vii. pi. viii. tig. 1 ; Salter & H. Woodw. 

 18l;5, Cat. & Chart Foss. Crust, p. 12, fig. 40 ; Etheridge, Morris, and Jones, 

 1867, Appen. Murch. Siluria, p. 521. 

 JV. Koibii, Emnnich, 1845, Neues Jahrb. p. 45 ; M'Coy, 1840, Syn. Sil. 

 Foss. Ireland, p. 43. 



Remopleurides dorsospinifer, Portlock, 1843. Lower Silurian, 



Desertcreat, Tyrone, Tramore, Waterford. 



Remopleurides dorsospinifer, Portlock, 184.3, Rep. Geol. T-\Tone, p. 256, pi. i. 

 figs. 3 & 4; M'Coy, "1846, Syn. Sil. Foss. Ireland, p. '43; Salter, 1853, 

 Geol. Surv. Decade vii. pi. viii. figs. 3, 4 ; Etheridge, Morris, and Jones, 

 1867, Appen. Murch. Sil. p. 521, & (p. 206) foss. 48. fig. 5. 



Remopleurides laterispinifer, Portlock, 1843. Lower Silurian, 



Townland of Bardahassiagh, Tyrone. 



Remopleurides laterispinifer, Portlock, 1843, Rep. Geol. Tvrone, p. 250, pi. i. 

 fig. 2; M'Coy, l«46,*Syn. Sil. Foss. Ireland, p. 43 ; tSalter, 1853, Geol. 

 Surv. Decade vii. pi. viii. fig. 2 ; Etheridge, Morris, and Jones, 1867, 

 Appen. Murch. Sil. p. 621. 



i I 



