24 



ANGELINA, Salter, 1859. 



Anr/elina, Salter, 1859, in Siluria, 2nd edit. p. 53 ; 1804, Geol. Surv. 

 Decade xi. 

 Distribution. Cambrian. 



Angelina Sedgwickii, Salter, 1859. Upper Tremadoc Slate, Garth, 



Portmadoc ; Ynys Tywyn, N. Wales. 

 Angelina Sech/wickii, Salter, 1859, in Siluria, 2nd edit. p. 5.3, fig. 2, Foss. 9 

 (A. subnrmata, ib. fig. 3) : 1865, Decades Geol. Surv. no. 11, pi. vii. figs. 1-5 ; 

 1866, ib. vol. iii. p. 308, pi. vii. figs. 1-5. 



ARIONELLUS, Barrande, 1852. 



Arionellm, Barrande, 1852, Syst. Silur. Bobeme, vol. i. p. 404 ; Hicks, 

 1872, Quart. Journ. Geol. Soc. vol. xxviii. p. 176. 

 Distrihdion. Cambrian, Silui'ian, 



Arionellus longicephalus, Hicks, 1872. Menevian Group, St. Davids, 



and near Maentwrog, N. Wales. 



AriuneUus lonqicephahts, Hicks, 1872, Quart. Journ. Geol. Soc. vol. xxviii. 

 p. 176, pi. V. figs. 20-26. 



ASAPHUS, Brongn. 1822. 



Asaphus, Brongn, 1822, Crust. Foss. ; Murch. 1837, Sil. Syst. ; Milne-Edw. 



1840, Crust, vol. iii. p. 310; Salter, 1849, Decade ii. Geol. Surv. ; Wyatt- 



Edgell, 1867, Geol. Mag. vol. iv. p. 15. 

 Brongniartia, Eaton, 1832, Text-book. 

 Isotelm, Portlock, 1843, Geol. Rep. Tyrone, p. 299; M'Coy, 1851, Synops. 



Woodw. Pal. Foss. p. 171. 



Subgenera : — 



a. Ptyclioinjge, Angelin, 1854. 



b. Basiliciis, Salter,. 1849. 



c. Isotelus, De Kay, 1824. 



d. Crypto7iymus, 12ichwald, 1825. 



e. BracJn/aspis, Salter, 1866. 

 Distribution. Cambrian and Silurian. 



Asaphus (Isotelus) affinis, M'Coy, 1851. Upper Tremadoc Slate, 



Pen-y-clogvs^yn and Garth, Penrhyn, 



Isotelus affinis, M'Coy, 1851, Pal. Foss. Woodw. Mus. pi. i. F. fig. 3. 

 Asaphus affinis, Salter, 1866, App. Ramsay Geol. N. Wales, Mem. Geol. Surv. 



vol. iii. p. 310, pi. viii. fig. 15 ; 1866, Pal. Soc. Mon. pt. 3, pi. xxiv. 



figs. 13, 14. 

 Asaphus (Isoletus) affinis, Salter, 1866, Mem. Geol. Surv. vol. iii. p. 310, 



pi. viii. fig. 15, pi. xii. fig. 4 ; 1873, Cat. Cam. & Sil. Foss. p. 17. 



Asaphus (Ptychopyge) corndensis, Murch. 1839. Llandeilo Flags, 



Gilwem, Builth, and Corndon Mountain. 



Asaphus cortidensis, Murch. 1839, SU. Syst. pi. xxv. fig. 4; Salter, 1859, 



Siluria, 2nd edit. pi. iii. fig. 4. 

 A. (Pti/chopt/ge) corndensis, Salter, 1866, Mon. Pal. Soc. pt. 3 ; 1873, Cat. Camb. 



& Sil. Foss. p. 32, pi. xvi. ; Wyatt-Edgell, 1867, Geol. Mag. vol. iv. p. 15, 



