cclviii 



INFERIOR OOLITE AMMONITES 



toarcense, Q-rammoceras, 165, 221,222, 305, cxxxi, 



cxxxii ; and Orbignyi, connection between, 



table, 183 ; in Lias and Inf. Oolite, Low 



mistake arose, 175 

 toarcense-striatulum, note on term, cxlvi 

 toarcense-striatulum, Grammoceras, PI. 28, figs. 



14, IS, p. 173, see explicatum, Pseudogram- 



moceras 

 toarcense-striatulum, Grammoceras, 165, cxlvi 

 toarcensis, Ammonites, 172 ; Lima, 172 

 Toarcian, 220 ; value of term, 173 ; stage, ccv 

 Toarcien, equivalents of, 173 

 toarciense, Grammoceras, PL 28, figs. 7 13, p. 169 



(G-. toarcense) ; p. cxxxii 

 toarciensis, note on word, 173 

 Toarcium, 172 

 tolutarium, Rhaeboceras, SuppL, PL 11, figs. 4 



6 ; p. lxxiii 

 tolutarius, Ammonites, lxxii, lxxiii 

 toma, Canavarella, SuppL, PL 22, figs. 16-18; p. 



cxxix 

 torquata, Denckmannia, SuppL, PL 3, figs. 4 6 ; 



p. xix 

 torquata, Denckmannia, ix 

 Tortiradiate (series), lxxiv 

 Tortiradius, position of, in regard to other forms 



of radii, lxxiv 

 tortiva, Fontannesia, PL 47, figs. 8, 9 ; p. 262 



(Dnmortieria grammoceroides) ; p. cxci 

 tortum, Rhaeboceras, SuppL, PL 11, figs. 1-3 ; 



Fig. 28 in text ; p. lxxii 

 torulosum, Lytoceras, 50, 51, 52 

 torulosus, Ammonites, 45, 49 ; zone of, 49 

 Torulosus bett, 2 

 Toulon, 294, 295, 299 

 toxeres, Darellia, SuppL, PL 18, figs. 13-15 ; p. 



cxiii 

 Toxolioceras, SuppL, p. cxxvi ; incisum, mundum, 



tenerum, walkeri; classification, cxcviii 

 Transverse ornament, cc 

 Trent, 114, 175, 281, xiv 

 Triangle, inverted, 360 

 Triangles, proportional, cxcvii 

 triangulare, Deltotoceras, Fig. 84, p. cxx 

 Tribe 14 

 trichina, Manselia, SuppL, PL 10, figs. 14-16, p. 



lix 

 tridactyla, Sonninia, PL 101, figs. 1 3 ; pp. 384, 393 



trifoliatum, Phylloceras, 301 



trifurcatum, Strigoceras, cci 



Trigonia-grit, Lower, ccix ; for Lioceras con- 

 cavum, 62 ; and Fontannesia, cxci ; date of, 

 ccvii 



Trigonia-grit, Upper, 7, ccix ; age of, 91 ; date of, 

 ccvi 



Trigonia grits and Dorset Cephalopod bed, 3 



Trigonia navis, zone of, 49 ; beds, 258 



Trimarginate, 132 



trimarginatum, Harpoceras, 13 



trimarginatus, Ammonites, 127, 129 



Trinomial nomenclature, remarks on, 315 



Tropiditae, 14 



Tropidoceras, 13, 14, 127 



Trotternish, lxx' 



Truellii, Ammonites, confounded witli Hvperlio- 

 cei*as discoideum, 92, 99 



Truellii hemera, vi ; strata of, ccvi 



truellii, Strigoceras, cci ; hemera, ccv 



tuberata, Kiliania, SuppL, PL 15, figs. 1-3 ; p. 

 lxvi 



tuberculata, Ludwigia, PL 3, figs. 4, 5; PL A, 

 fig. 2 ; p. 17 (Ludwigia Murchisonao. var, 

 obtusa) ; SuppL, PL 11, fig. 30 ; p. lxix 



Tuberculate, iv 



Tuberculate Sonniniae, 447 



Tuberculate costate Sonniniae, 447 



Tuberculate stage, 405 ; in G-rammoceras, cxxxi 



Tubereulation, iii 



tumefacta, Denckmannia, SuppL, PL 1, figs. 7 10 ; 

 p. xix 



tumefacta, Denckmannia, ix 



tumidus, Spirifer, 258 



Turbo, 46 



turgidus, Amaltheus, 291 



Turrilites, 381 



Tutcher, J. W., and Dundry specimen, 434 ; and 

 Brasilina Tutcheri,lxxxiii,lxxxiv; and Fontan- 

 nesia at Dundry, clxxxviii, cxci ; and photo- 

 graphs, cxcii 



Tutcheri, Brasilina, SuppL, Figs. 44, 45 in text, 

 p. lxxxiii (? SuppL, PL 10, figs. 35-37, p. 

 cxxx) 



Type-species, cciii 



Typical series (Fontannesia), clxxxviii 



Ubald, 294 



