INDEX 



ccxli 



nuda, Sonninia. PI. 82, figs. 3, 4 ; PI. 103. fig. 10; 



pp. 352, 386, 402 

 *nudus, Amaltheus, PL 49, fig. 3. p. 288 

 nudus, Amaltheus, 2^7 



Numerical acme, cxcix 



obesum, Pseudogrammoceras, Suppl.. Fig. 146. 



p. cl 

 Oborue, 117, 120, 292, 304, 305, 300, 309, 310, 



312 ; section at, 8 ; strata of, 10, ccvi ; see 



Frogden Quarry 

 obruta. Fontannesia, Suppl.. PI. 24, figs. 8-11. p. 



clxxxix 

 Obsoleticarinate, note on, xcv 

 obtecta. Denckmannia. Suppl., PL 4. figs. 4 6. p. 



xxi 

 obtecta, Denckmannia, x 

 obtusa, Cosmogyria. Suppl.. PL 4, figs. 10-12 d, 



p. liii 

 obtusiformis, Sonninia, PL 72. figs. 3 5 ; PL 90, 



fig. 10 (PL 85, figs, 7. 8?); Figs, in text, 



27, p. 391 : 53 , p. 428 : 79. p. 443 ; pp. 333, 



430 

 obtusiformis. Welschia, PL 1, p. 17 (Ludwigia 



Murchisonae) ; Suppl., PL 4. fig. 19: PL 12, 



figs. 1-3 a ; p. li 

 obtusum, Asteroceras, morphological equivalent. 



334 

 obtusus, Ammonites, 22<j 



occidentale, Hammatoceras, 154 : Harpoceras, 154 

 occidentals, Ammonites. 144 

 occidentalis. Haugia, PL 27, figs. 1. 2. p. 154 ; 



Suppl.. p. xxviii 

 occidentalis, Haugia, 165 

 occlusum, Hyperlioceras ?. Suppl., PL 21. figs. 



34-36 

 OZcotraustes. p. exciv; conjungens, costiger. 



nodifer, rugosus 

 (Ecotraustes, 140 

 ffidania. Suppl., p. cvii ; delicata, falcigera. in- 



flata, lepta. parvicostata 

 (Edania, classification, exeviii 

 (Ekotraustes, exciv 

 Ogerieni, Ammonites. 14i». 1-32. vii. x, xi. xxiv. xxv ; 



Hammatoceras, 148, 287, 313, x, xxiii ; Ham- 



matoceras (Sonninia), 149 

 ogerieni. Haugia. Suppl., p. xxiv 



Ogerieni, Haugia, PL 23, Jigs. 16, 17, see Duuior- 

 tieri, Phymatoceras 



Ogerieni, Haugia, 40, 152, xxx 



Old age affecting carina, cvi 



Old Duston, 52 ; stouepit, section at, 48 ; North- 

 ampton Sand, 52 ; see Duston 



Oligogyral, ii 



omphalica. Sonninia. PL 83. figs. 5-9 ; pp. 363. 

 387. 405 



Omphalica stock, separation of species in, 362 



Ontogeny, Hyatt's scheme of stages, 357; terms 

 of, 357 ; six stages of, 357 ; not repeating 

 phylogeny, causes of, 290 ; and phylogeny, 

 cxcix ; events in, ccii 



Oolite, Great, 47 



Oolite, ironshot, date of, ccvi 



Oolite, from Lias, 5 ; see Inferior Oolite, Lias- 

 Oolite division 



Oolite Marl, 7, 65 ; date of, ccvii 



Oolite Sands, 3 



oolitica, ELyncbonella, 43 



opaca. Ludwigella, Suppl.. PL 19, figs. 19-21. p. 

 xc 



opalina, Ludwigia, 35 



Opalini heinera, change of name, xliv 



opaliniforme, Cypholioceras, PL 13. figs. 13 ; 

 PL A, fig. 10, p. 35 (Lioceras opalinvun) ; 

 Suppl., PL 10, figs. 1-4. p. xlv; figs. 1, 3, p. 



XXXIV 



aff. opaliniforme. Cypholioceras, Suppl., p. xlvi 



opaliniforme, Cypholioceras, heinera, ccv 



Opaliniformis hemera, vi, xlvi ; strata of, xxxv. 

 ccvii i 



Opalinoid Ammonites, position of.clxxxiii; species, 

 xxxv 



opalinoides, Ammonites. 228, xxxiii ; type cbosen, 

 80, 228 



Opalinum beds, 164, 166-168 



opalinum, Harpoceras, 4, 13, 35, 53, 127. xxxvi. 

 xlii, xlvi ; Leioeeras, 35 



opalinum. Lioceras. Suppl., PL 10. figs. 6-8 ; fig. 

 2, p. xxxiv ; p. xli 



opalinum, Lioceras, PL 13, figs. 1-3, see opalini- 

 forme, Cypholioceras ; PL 13, figs. 4, 5, sp., 

 Canavarina: PL 13. fig. 6, striatum. Lioceras ; 

 PL 13. figs. 7-10, subglabra, Walkeria ; PL 

 13, fig. PJ, striatum. Lioceras: p. 35, seespp. 

 above 



