INDEX TO VOLUME I. 



Note. — The plate-numbers are given in large Roman numerals, ami the numbers of the figures in 

 small Roman numerals. The numerals in black type indicate the page on which the diagnosis occurs. 



PAGE 



Acanthactinella 96, 101, 166 



— Beuniei ... ... ... 167 



Acanthoconia ... ... . . ... 119 



Acanthospongia ... ... . .. ... 109 



— Siluriensis . . ... ... 177 



Smithii ... ... 158 



Acestra 109,110 



— parallela ... ... ... ... 161 



Achilleum ... ... ... ... ... 245 



costatum ... ... ... ... 246 



Actinospongia ... ... ... 245 



Ammonites Humphresianus, zone of 191, 208 



Murchisonse, zone of, 190, 215, 222, 



236 



Parkinsoni, zone of 190, 196, 197, 199, 



201-203,205,206, 



210,216,218,230, 



232-234, 238, 240, 



242 



perarmatus, zone of 192, 193, 212, 



217, 227,228, 



247 



Ammonites plicatilis, zone of 192, 223, 224, 229 



spinatus, zone of ... ... 250 



Amorphospongia ... ... ... ■• • 203 



Amphispongia ... ... ... 96, 97, 130 



oblonga 131 ; III, iii, iii a-iii/ 



Andoversford 190,236 



Anomocladina, Family 88, 112, 115, 116, 157, 



207 

 — spicules of ... ... ••■ 71 



Appendix ... . .. ••■ ••■ 251-254 



Arkendale ... ... 99,143,150,160 



Armstrong, Young and Robertson ... 25 



Asteractinella 96, 101, 169, 172 



expansa 173; VIII, iii, iii a-iii h 



— tumida ... 174 ; IX, i, i a-i g 



PAGE 



Astrseospongia 96,97,133,169 



Devoniensis 140; IV, viii, viiia- 



viii c 

 Hamiltonensis ... ... 141 



meniscoides ... ... 141 



patina 134 ; I, vii, vii a-vii </ 



109 



245 



95,97, 12,113,116 

 incisodobata ... 114 ; II, v, v a 



Astroconia ? . 



Astrospongia 



Astylospongia 



inornata 

 sp. ... 



Atractosella 



siluriensis 



Axinella 



paxillus 



vetusta 



Ayrshire 



116 



... 177 



... 95,97,123 



123 ; I, vi, vi a-\id 



95,145 



145 ; IX, x 



145 ; IV, vi 



101, 162, 170 



Baer, J. J. 

 Balingen 

 Barrois, C. 



Bath 



Beith (Ayrshire) 



Benachlan 



Ben Bulben 143, 144, 152, 154, 



Benet, E 



Bennie, J. 150, 151, 156, 167, 1 



Benouville 



Bibliography ... 



Bigsby, J. J. ... 



Billings, E. ... 17, 



Birdlip Hill 



Blainville, H. M. de 



Blake, J. F 



Blastinia 



3 



232 



23, 38 

 219,221, 222 



172 



144,145 

 155,157,160,162 



6 



70, 171, 174, 175, 

 176 



221 



3-43 



19, 29 



24, 119, 120, 138 



190, 222, 236 



7,235 



192, 211, 212 



245 



L L 



