INDEX 
TO VOLUME 
I. 
Nore.—The plate-numbers are given in large Roman numerals, and the numbers of the figures in 
small Roman numerals. 
PAGE 
Acanthactinella 96, 101, 166 
= Benniei 167 
Acanthoconia 119 
Acanthospongia 109 | 
— Siluriensis 1i7 
— Smithii 158 
Acestra 109, 110 
—  parallela 161 
Achilleum 245 
— costatum _. 24.6 
Actinospongia .. 245 
Ammonites Humphresianus, zone of 191, 208 | 
— Murchisonex, zone of, 190, 215, 222, 
Y36 
= Parkinsoni, zone of 190, 196,197,199, 
201-203, 205, 206, 
210, 216, 218, 
232-234, 238, 
24.2 
perarmatus, zone of = 192, 19 
230, 
240, 
Ammonites plicatilis, zone of 192, 225, 224, 229 
= spinatus, zone of 
203 
Amorphospongia 
96, 97, 150 
Amphispongia 
v= oblonga 131; IT, iii, ii aay 
Andoversford ae : 190, 236 
Anomoeladina, Family 88, 112, 115, 116, 157, 
207 
— spicules of ... 71 
Appendix si 251-254. 
Arkendale 99, 143, 150, 160 | 
Armstrong, Young and Robertson 25 
Asteractinella 
173; VIII, iii, itia—-iiih 
174; IX, i, ia-ig 
expansa 
tumida 
250 | 
96, 101, 169, 172 
The numerals in black type indicate the page on which the diagnosis occurs. 
PAGE 
96, 97, 1388, 169 
140; IV, viii, viii a— 
Astreospongia 
Devoniensis 
vilic 
— Hamiltonensis 141 
= meniscoides 141 
— patina 134; I, vii, viia—-vud 
Astroconia ? 109 
Astrospongia 245 
Astylospongia ce 95,97, 12, 118, 116 
— inciso-lobata 114; II, v, va 
= inornata 116 
sp. 77 
95, 97, 123 
123; I, vi, via—vid 
Atractosella 
siluriensis 
Axinella 95, 145 
— _ paxillus 145i: eXGex 
—  vetusta 145; IV, vi 
Ayrshire 101, 162, 170 
Baer Jiavk 53 
Balingen 232 
Barrois, C. : 23, 38 
Bath 219, 221, 222 
Beith (Ayrshire) 5 le 
Benachlan a ; 144, 145 
Ben Bulben 143, 144, 152, 154, 155, 157, 160, 162 
Benet, E. : : ; 6 
Bennie, J. 150, 151, 156, 167, 170, 171, 174, 175, 
176 
Benouville . 221 
3-43 
Bibliography 
Bigsby, J. J. 
Billings, E. 
19, 29 
17, 24, 119, 120, 138 
Birdlip Hill 190, 222, 286 
Dlainville, H. M. de ne : 4; 285 
Blake, J. F. 192, 211, 212 
Blastinia 245 
L L 
