40 TRILOBITA. 



Homalonotns, sp., Salter, 1865. Lower Silurian, Gorran Haven, 



CoruwaU. 



? Homalonotus bisulcatus, M'Coy, Quart. Journ. Geol. Soc. vol. viii. p. 13. 

 H., sp., Salter, 1865, Mon. Pal. Soc. pt. 2, p. 112, fig. 26, woodcut. 



Homalonotus Vulcani, Murchison, 1859. Llandeilo Flags, Shelve, 



Shropshire. 

 Homalonotus Vulcani, Murch. 1859, Siluria, 2ud ed. pi. ii. figs. 'S, 4; Salter? 



ILL.ffiNUS, Dalman, 1825. 



nic^ius, Dalman, 1825, Palsead. Trilob. 51. 12 ; Murch. 1839, Sil. Syst. 

 p. 661 ; Emmrich, 1839, Dissert, p. 33 ; Hall, 1843, Geol. Eeport New 

 York, p. 102; Portlock, 1843, Report Geol. Londond.; M'Coy, 1846, 

 Syu. Sil. Foss. Irel. p. 54; Salter, 1848, Mem. Geol. Surv. vol. ii. pt. 1. 



Distribution. Cambrian and Silurian. 



Subgeneric divisions : — 



1. Octillcenus, Salter, 1866. 5. Ectilleenm, Salter, 1866. 



2. Pancleria, Volborth, 1863. 6. Hydrolanus, Salter, 1866. 



3. Dys2)lanus, Burmeister, 1843. 7. Illesnopsis, Salter, 1865. 



4. Illcsnus proper, Dalman, 1826. 8. Bumastus, Murchison, 1837. 



lUsenus (Dysplanus) semulus, Salter, 1867. May-Hill Sandstone, 



Shropshire. 

 lllcsnus cemulus, Salter, 1867, Mon. Pal. Soc. pt. 4, p. 187, pi. xxviii. fig. 5. 



Illaeuus Bailyi, Salter, 1867. Caradoc or Bala, Dunabrattin Head, 



Waterford. 

 IllcB7ius Bailyi, Salter, 1867, Mon. Pal. Soc. pt. 4, p. 192, pi. xxviii. fig. 14. 



lUaenus (Bumastus) Barriensis, Murch. 1837. May-HUl Sandstone, 



Malvern ; Woolhope Limestone, Hereford- 

 shire, and Wenlock Rocks, Llandeilo. 

 Ulcenus {Bumastus) Barriensis, Murch. 1839, Sil. Syst. p. 656, pi. vi. bis; 



Emmrich, 1839, Dissert, p. 33. 

 I. Barriensis, Salter, 1849, Geol. Surv. Decade ii. pi. iii. & pi. iv. ; id. 1859, 

 Siluria, 2nd ed. p. 123, foss. 16. fig. 2 ; id. 1867, Mon. Pal. Soc. pt. 4, p. 203, 

 pi. xxvii. figs. 1-5. 



lUaenus (Dysplanus) Bowmanni, Salter, 1848. Llandeilo Flags, or 



Lower Bala, N. and S. Wales, Westmoreland, Scotland, Ireland. 



IllfBuus centrottts, Portlock, 1843, Geol. Rep. pi. x. figs. 3-6 : M'Coy, 1846, 



Syn. Sil. Foss. Ireland, p. 54. 

 /. Boicmanni, Salter, 1848, Mem. Geol. Surv. vol. ii. pt. 1, pi. viii. figs. 1-3 ; 

 id. 1867, Mon. Pal. Soc. pt. 4, p. 185, pi. xxv. figs. 6-13, pi. xxx. fig. 6 ; id. 

 1866, Mem. Geol. Surv. vol. iii. pi. 18. fig. 8. 



Illaenus (Bumastus) carinatus, Salter, 1867. Wenlock Limestone, 



Winnings Quarry, Malvern. 

 Ukenus (Bumastus) carinatus, Salter, 1867, Mon. Pal. Soc. pt. 4, p. 209, 

 pi. xxvii. figs. 8, 9. 



