TKILOBITA. 59' 



STAUROCEPHALUS, Barrande, 1846. 



Staiirocephahis, Barrande, 1846, Prodrom Syst. Sil. Boheme, p. 53 ; WCoj, 

 1855, Synopsis Woodw. Mus. ; Salter, 1864, Geol. Surv. Decade xi. 

 Distribution. Cambrian & Silurian. 



Staurocephalus globiceps, Portlock, 1843. Caradoc, Tyrone and 



Ayrshire. 

 Cerauriis f/lobiccps, Portlock, 1843, Bep. Geol. Tyrone, p. 257, tab. i. tig. 7. 

 Staurocep/idlus qlobiceps, Salter, 1865, Geol. Surv. Decade xi. pi. v. fii>-. 6 ; 

 Salter, 1865, Mon. Pal. Soc. pt. 2, p. 85, pi. vii. fig. 21. 



Staurocephalus MurcMsoni, Barrande, 1846. Caradoc, N. Wales ; 



Woolhope and Wenlock Limestone, Presteign, 

 Dudley, and Malvern. 



p. 540; Salter, 1865, Geol. Surv. Decade xi. pi. v. figs. 1-5; Salter, 1865, 

 Mon. Pal. Soc. pt. 2, p. 84, pi. vii. figs. 13-20 ; Salter, 1873, Cat. Camb. & 

 Sil. Foss. p. 50 & figures & p. 131. 



Staurocephalus ? unicus, Wyv. Thomson, 1857. Caradoc, Ayrshire. 



Acidaspis unica, Thomson, 1857, Quart. Joum. Geol. Soc. vol. xiii. pi. vi. 



fig. 13. 

 Staurocephalus? lunca, Salter, 1865, Geol. Surv. Decade xi. art. 5: Salter, 



1865, Mon. Pal. Soc. pt. 2, p. 86, pi. vii. figs. 22-24. 



Staurocephalus, sp., Salter, 1865, Mon. Pal. Soc. pt. 2, p. 87, pi. vii. fig. 25. 



STYGINA, Salter, 1853. 



Ogjigia, Murcli. 1837, Sil. Syst. 



Asaphus, Portlock, 1843, Rep. Geol. Londond. & Tyrone. 

 Stygina, Salter, 1853, Rep. Brit. Assoc, Trans. Sect. p. 59. 

 Distribution. Silurian. 



Stygina latifrons, Portlock, 1843. Caradoc, Desertcreat, Tyroue. 



Asaphus latifruns, Portlock, 1843, Rep. Geol. Londond. & Tyrone, pi. vii. 



figs. 5, 6. 

 A. margiu'itus, Portlock, 1843, Rep. Geol. Londond. & Tyroue, pi. vii. fig. 7. 

 Sttjipna latifrons, Salter, 1853, Rep. Brit. Assoc. Trans. Sect. p. 59; Salter, 



1859, Siluria, 3rd edit. p. 184 (foss. 26. fig. 2) ; Salter, 1864, Geol. Sm-v. 



Decade xi. sec. 2, p. 1, pi. xi. ; Salter, 1866, Mon. Pal. Soc. pt. 3, p. 172, 



pi. xviii. figs. 7-10. 



Stygina Murchisoniae, Murch. 1S37. Caradoc, Jlount Pleasant, 



Carmarthen. 

 Otjygia Murchisonice, Murcli. 1837, Sil. Syst. pi. xxv. fig. 3. 

 Styyina Murchisoniee, Salter, 1853, Report Brit. Assoc. Trans. Sect. p. 59 ; 

 Salter, 1859, Siluria, 3rd edit. p. 55 (loss. 10. fig. 4) ; Salter, 1864, Geol. 

 Surv. Decade xi. sec. 2, p. 3, pi. iv. fig. 1 ; Salter, 1866, Mon. Pal. Soc. 

 pi. 3, p. 173, pi. xviii. fig. 11. 



Stygina? Musheni, Salter, 1866. Caradoc, Buildwas. 



Stygina ? Musheni, Salter, 1866, Mon. Pal. Soc. pt. .3, p. 174, pi. xix. fig. 1. 



