34 TRILOBITA. 



CYPHASPIS, Biirraeister, 1843. 



Ci/phaspis, Burmeister, 1843, Trilob. : Salter, 1853, Geol. Surv. Decade vii. ; 



' .March. 1807, Siluria. 

 I£m-pes, M'Coy, 1846, Svnops. Sil. Foss. Ireland. 

 HarpidelUi, M'Coy, 1849, Ann. & Mag. Nat. Hist. vol. iv. p. 412. 

 Proteus, Angelin, 1852, Palpeontol. Suec. 

 Distribution. Silurian. 



Cyphaspis megalops, M'Coy, 1846. Llaudeilo Flags to Lower Ludlow : 

 Co. Galway, Dublin ; Girvan, Ayrshire ; Corwen, 

 N. Wales ; Dudley, Malvern, &c. 

 Ilarpes? mefjalojis, M'Coy, 1846, Synops. Sil. Foss. Irel. pi. iv. fig. 5. 

 Harpiddla megalops, id. 1849, Ann. & Mag. Nat. Hist. vol. iv. p. 412. 

 Cyphaspis megalops, Salter, 1853, Geol. Surv. Decade vii. pi. v. 



Cyphaspis pygmaBus, Salter, 1853. Silurian, Malvern Hill. 



Proi'tus dcgontnlus, Lov^n, 1845, G5fvers. Kongl. Vetensk. Akad. t. i. fig. 4 ; 



Angelin, 1852, PalfBontol. Suec. t. xvii. fig. 7. 

 Cyphaspis pygmceus, Salter, 1853, Geol. Surv. Decade vii. p. 6, note. 



CYPHONISCUS, Salter, 1852. 

 Cyphonismts, Salter, 1852, Rep. Brit. Assoc, p. 57. 

 Distribution. Silurian. 



Cyphoniscus socialis, Salter, 1852. Llandeilo Flags, Chair of Kildare, 



Ireland. 

 Cyphoniscus socialis, Salter, 1852, Eep. Brit. Assoc, p. 57 ; Salter, 1853, Geol. 

 Surv. Decade \di. pi. ix. ; March. 1867, Silm-ia, p. 517, foss. 48. tig. 8. 



DALMANNIA, Emmr. 1845. 



Dalmannia, Emmr. 1845, in Leonh. & Bronn's N. Jahrb. ; Salter, 1848, Mem. 



Geol. Surv. vol. ii. pt. 1, p. 337. 

 Distribution. Upper Silurian. 



Dalmannia affinis, Salter, 1848. Upper Silurian, Llandowror ; Lower 



Silurian, Ayrshire. 

 Dalmannia affinis, Salter, 1848, Mem. Geol. Surv. vol. ii. pt.l, p. 337, pi. v. fig. 5. 



DIKELOCEPHALUS, Dale Owen, 1852. 



Dikelocephalus, D. Owen, 1852, Rep. on Minnesota and Wisconsin ; Salter, 

 1866, Mem. Geol. Surv. vol. iii. p. 303. 

 Distribution. Camhrian. 



Dikelocephalus? (Centropleura ?) celticus, Salter, 1866. Upper Lingula- 



Flags, Ogof-ddu, N. Wales. 

 Dikelocephalus? (Ce?itropleura?) celticus, Salter, 1860, Mem. Geol. Surv. 

 vol. iii. p. 304, pi. v. figs. 21, 22. 



Dikelocephalus? (Centropleura?) discoidalis, Salter, 1866. Upper 



Lingula-Flags, Ogof-ddu, Criccieth, N. Wales. 

 Dikelocephalus? {C-ntropleura?) discoidalis, Salter, 1866, Mem. Geol. Surv. 

 vol. iii. p. 304, pi. v. figs. 18, 19. 



