18 tehobita. 



Odontopleura, Emmrich, 1830, De Trilobit. Dissert, p. 53 ; Burmeister, 

 Oroa7i. d. Trilob. 1843, p. 71, pi. i. fig. 4, et pi. ii. fig. 11 ; Emmrich, 1845, 

 N. Jalirb. f. Miner. Ileft i. pp. 44 & 51 ; Barrande, 1846, Notice Prelim. 

 et Nouv. Trilob. ; Geinitz, Gnmdr. d. Verstein. 1846, p. 238 ; Beyrich, 

 Unter. lib. Trilobiten, ii. St. p. 16, pi. iii., 1846. 



Arqes, Goldfuss, N. Jahrb. f. Miner. 1843, Heft v. pp. 544 & 556, pi. 4. 

 figs. 1, 2. 



Ceraurus, Lov^n, 1845, (Efvers. af Kongl. Vetensk, Akad. Forli., April 

 1845. 

 Distribution. Llandeilo and Bala beds, Wenlock and Ludlow gi'oups. 



Acidaspis Barrandii, Fletcher & Salter, 1859. Silurian, Dudle}^ 



Acidaspis hispinosus, Salter, 1848, Mem. Gaol. Surv. toI. ii. pt. 1, pi. 9. fig. 4 



only. 

 A. B'arrandii, Fletcher & Salter, 1859, in Siluria, 3rd edit. p. 2G1, Foss. 64, 



Sg. 9 ; Salter, 1873, Cat. Camb. & Sil. Foss. p. 134. 



Acidaspis bispinosus, M'Coy, 1844. Wenlock L., Dudley and Abberley ; 



Llandeilo Flags, Chair of Kildare. 



Acidaspis bispitwsvs, M'Coy, 1844, Synopsis Sil. Foss. Ireland, pi. iv. fig. 7 ; 

 Salter, 1848, Mem. Geo!. Sury. yol. ii. pt. 1, p. 349, pi. 9. figs. 4 & 5; 

 Salter, 1853, Geol. Surv. Decade vii. pi. yii. fig. 4. 



Acidaspis Brightii, Murch. 1839. Wenlock Limestone, Dudley 



and Vinnal Hill. 

 Paradoxides quadrimiicronatus, Murch. 1839, Sil. Syst. t. 14. fig. 10. 

 Odoidoplcura elllptica, Emmr. 1845, Neues Jahrb. pt. 1. 



Acidaspis Briijhtii, Murch. 1839, Sil. Syst. t. 14. fig. 15; Salter, 1848, Mem. 

 Geol. Surv. pt. 1, vol. ii. p. 348, pi. ix. figs. 6-9. 



Acidaspis callipareos, Thomson, 1857. MuUoch-Hill Sandstone, 



Girvan, Ayrshire. 

 Acidaspis callipareos, Thorns. 1847, Quart. Journ. Geol. Soc. vol. xiii. p. 208, 

 pi. yi. figs. 11 & 12. 



Acidaspis Caractaci, Salter, 1853. Caradoc, Gretton, Shropshire. 



Acidaspis Caractaci, Geol. Surv. Decade vii. 1853, p. 7 of text attached to 

 pi. 6 ; Quart. Jouru. Geol. Soc. 1857, vol. xiii. p. 211, pi. yi. figs. 15-17. 



Acidaspis coronata, Salter, 1857. Lower Ludlow Kock, Yinnal 



Hill, Ludlow. 

 Acidaspis Brightii, Salter, Mem. Geol. Surv. vol. ii. pt. 1, p. 348, pi. 9. figs. 



A. coronata, Salter, Quart. Journ. Geol. Soc. vol. xiii. p. 210. 



Acidaspis dama, Salter & Fletcher. Upper Silurian, Dudley. 



Acidaspis dama, Salter & Fletcher, 1854, in Morris Cat. p. 99 ; 1859, 

 Siluria, 3rd edit. Appen. p. 539 ; 1876, Cat. Camb. & Sil. Foss. p. 134. 



Acidaspis dumetosus, Salter & Fletcher. Upper Silurian, Dudley. 



Acidaspis dumetosus, Salter & Fletcher, 1854, in Morris Cat. p. 99; 1859, 

 Siluria, 3rd edit. Appen. p. 539 ; 1876, Cat. Camb. & Sil. Foss. p. 134. 



