TRILOBITA. 41 



Illaenus Davisii, Salter, 1849. Caradoc, Bala Lake, Rhiwias, 



Pont-y-Glj-n, Diffwys, -Corweii ; Wrae Limestone, Biggar, Peeblesshire. 

 Illcenm Davisii, Salter, 1849, Decade ii. Geol. Surv. pi. ii. ; M'Coy, 1852, 

 Synops. Woodw. Foss. p. 171, pi. i. G. fig. 36 ; Salter, 18-54, Siluria, 1st ed. 

 woodcut 29. tig. 2 ; id. 1859, Siluria, 2nd ed. p. 223, foss. 44. fig. 2 ; id. 

 1865, Mem. Geol. Surv. vol. iii. pi. xviii. fig. 9, p. 317 ; id. 1867, Mon. Pal. 

 Soc. pt. 4, p. 194, pi. xxix. figs. 10-16. 



Var. ft. involutus, Salter, 1849, Decade ii. Geol. Surv. pi. ii. fig. 8. 



Illaenus Hughesii, Hicks, 1875. Upper Areuig, Llanviru Quarry. 



Illceitus Hur/hesii, Hicks, 1875, Quart. Joui'u. Geol. Soc. vol. xxxi. p. 184, 

 pi. ix. fig. 7. 



Illaenus (Bumastus) insignis, Hall. Wenlock Limestone, Dudley and 



Malvern HilLs. 



llhemis Barriemis, Murch. 1839, Sil. Svst. p. 656, pi. y'u.big, fig. 3, pi. xiv. 



fig. 7 ; Hall, 184.3, Geol. Rep. New York, p. 102, no. 10. fig. 4, no. 19. fig. 3 ; 



Salter, 1859, Decade ii. Geol. Surv. pi. iii. fig. 2, pi. iv. figs. 9-11 ; id. 1859, 



Sihu'ia, 2nd ed. pi. xvii. figs. 9-11. 

 /. insiynis, Salter, 1867, Mou. Pal. Soc. pt. 4, p. 207, pi. xxvii. figs. 6, 7. 



Illaenus (Panderia) Lewisii, Salter, sp. Caradoc or Bala Limestone, 



Moelydd, Oswestry. 

 lUcenus {raiuhria) Letvisii, Salter, 1867, Mon. Pal. Soc. pt. 4, p. 183, pi. xxvi. 

 figs. 2, 2 a, b. 



Illaenus (Bumastus) Maccallumi, Salter, 1867. Llandovery Sandstone 



of Mullock, Girvan, Ayrshire. 

 Illcenus (Bnmastm) Maccallumi, Salter, 1867, Mon. Pal. Soc. pt. 4, p. 210, 

 pi. xxviii. fig. 1, and pi. xxx. figs. 2, 3. 



Illaenus Murchisoni, Salter, 1849. Caradoc Limestone, Grug and 



Birds Hill, Llandeilo. 

 lUcanus Rosenbergii, Salter, 1848, Mem. Geol. Surv. vol. ii. pt. l,pl. v. figs. 6-8. 

 1. Murclmoni, Salter, 1852, Sedgw. Synop. Woodw. Mus. fasc. i. Appen. p. iv ; 

 id. 1849, Decade ii. Geol. Surv. pi. ii. p. 4; id. 1867, Mon. Pal. Soc. pt. 4, 

 p. 201, pi. xxvi. fig. 1, and pi. xxx. fig. 7. 



Illaenus nexilis, Salter, 1867- Llandovery Schists of Mullock, Girvan, 



Ayrshire. 

 llUrnm nc.vilis, Salter, 1867, Mou. Pal. Soc. pt. 4, p. 190, pi. xxx. figs. 4, 5. 



Illaenus ocularis, Salter, 1849. Caradoc or Bala Limestone, 



Kildare. 

 Ilhemts ocularis, Salter, 1849, Geol. Surv. Decade ii. pi. ii. p. 4 ; id. 1807, Mou. 

 Pal. Soc. pt. 4, p. 198, pi. xxix. figs. 7, 8 (9?> 



Illaenus (Ectillsenus) perovalis, Murch. 1S39. Llandeilo Flags, Hope 



ilill, Corndou Mountain, Shropshire ; Llanrian, Pembrokeshire. 



Ilh/ni'.x perovalis, Murch. 18.39, Sil. Svst. p. 661, pi. xxiii. fig. 7: Salter, 1854, 



Siluria, 1st ed. pi. iv. figs. 13, 14 ; id". 1859, Siluria, 2nd ed. pi. iv. tigs. 13, 14 ; 



id. 1860, Mem. Geol. Surv. iii. p. 256 ; id. 1867, Mon. Pal. Soc. pt. 4. 



p. 211, pi. xxvi. figs. 5-8. 



a 



