TRIIOBITA. 45 



Niobe menapiensis, Hicks, 1872. Tremadoc Ilocks, Ramsey Island 



and Trcmanhire. 

 Niohe menapiensis, Hicks, 1872, Quart. Journ. Geol. Soc. vol. xxix. p. 40, 

 pi. iv. tigs. 1-9. 



Niobe solvensis, Hicks, 1872. Tremadoc Rocks, Ramsey Island 



and Tremanhire. 



Niohe snJrensis, Ilicks, 1872, Quart. Journ. Geol. Soc. vol. xxix. p. 47, pi. iv. 

 fig-g. 10-10. 



OGYGIA, Brongniart, 1822. 



Asaphus, Brong. 1822, Crust. Foss. t. ii. ; Dalman, 1826, Palsead. p. 68 ; 

 J. I). C. Sowerby, 1829, Loudon's Mag. Nat. Hist. vol. ii. ; Murcli. 1837, 

 Silurian Svst. ; Milne-Edw. 1840, Crust, iii. ; Burmeister, 1843, Org. 

 Trilob. ; Corda, 1847, Bcihra. Tril. ; Barrande, 18r,2, Syst. Sil. Boheme. 

 Oyycjia, Brong. 1822, Crust. Foss. ; Salter, 1849, Decade ii. Geol. Surv. ; 

 Wvatt-Edgell, 1867, Geol. Mag. vol. iv. p. 10; Salter, 1873, Cat. Camb. 

 & Sil. Foss'. 

 Distribution. Cambrian and Silurian. 



Ogygia angustissima, Salter, 1866. Llandeilo Flags, Gilwem, Builth. 



Ofiyf/ia anyustissima, Salter, 1806, Mon. Pal. Soc. pt. 3, pi. xiv. figs. 8, 9. 

 O. eonve.va, Wyatt-Edgell, Geol. Mag. 1867, vol. iv. p. 10. 



Ogygia Buchii, Brongn. 1822. Llandeilo Flags, Shropshire and S. Wales. 



Asiiphm de Buohii, Brongn. 1822, Crust. Fos.s. t. ii. fig. 2 ; J. D. C. Sowerbv, 

 1829, Loudon's Mag. JS'at. Hist. vol. ii. fig. 27 ; Buckland, 1830, Bridge- 

 water Treatisi^, t. xlvi. fig. 7; Murcli. 1837, Sil. Syst. t. xxv. fig. 2; Milne- 

 Edw. 1840, Crust, iii. p. 309. 



Oyyyin Buchii, Salter, 1819, Decade ii. Geol. Surv. pi. vi. ; id. 180-5, Mon. 

 Pal. Soc. pt. 2, p. 125, pi, xiv. figs. 1-7, pi. xv. figs. 1-4. 



Ogygia Buchii junior, Salter, 1865. Llandeilo Flags, Builth, 



Shropshire, and S. AValcs. 

 Trinuclcus? asaphoides, Murch. 1837, Sil. Svst. t. .xxiii. fig. 6; j\Iilne-Edw. 



1840, Crust, iii. 333. 

 Oyyyia Biwhii junior, Salter, 1865, Mon. Pal. Soc. pt. 2, p. 125, pi. xiv. 

 figs. 5, 0. 



Ogygia bullina, Salter, 1867. Aronig Rocks, St. David's.. 



Oyyyia bullina, Salter, 1867, Mon. Pal. Soc. pt. 4, p. 178, pi. xxv.* fig. 5. 



Ogygia peltata, Salter, 1866. Arenig Group, St. David's,, 



Pembrokeshire. 



Oyyyia scutatri.r, Salter, 1859, Siliuia, 2nd ed. p. 53, foss. 9. f. 1. 



O. peltafa, Salter, 1866, Append. Ramsay (ieol. N. Wales, Mem. Geol. Surv. 

 vol. iii. p. 313, pi. xii. fig. 8; id. 1866, Mon. Pal. Soc. pt. 3, p. 135, pi. xvii, 

 figs. 8-10; id. 1867, Mon. Pal. Soc. pt. 4, p. 177 (pi. xvii. figs. 8-lOj, 

 pi. XXV.* figs. 1-4. 



