INDEX TO GENERA AND SPECIES. 



Ammonites dejecius, Simpson ; see Amaltheus oxynotus . 



„ denotatus, Simpson ; see Arietites CoUenotii . 



„ discoides, Zieten ; see Harpoceras discoides.. 



„ dispansus, Lycett ; see Harpoceras variabile . 



„ Dudressieri, d'Orbigny ; see Aegoceras planicosta 



,, elegans, Sowerby ; see Harpoceras bicariuatum 

 „ „ Young and Bird ; see Harpoceras elegans 



„ Engelhardti, d'Orbigny ; see Amaltheus Engelhardti 



„ erugatus, Phillips ; see Aegoceras planorbis . 



„ exaratus. Young and Bird ; see Harpoceras exaratum 



„ eseortus, Simpson ; see Arietites raricostatus . 



„ falcaries, Quenstedt ; see Arietites semicostatus 



„ falcifer, Quenstedt ; see Harpoceras nitescens 

 ,, „ Sowerby ; see Harpoceras serpentinum 



„ fasciatus, Simpson ; see Lytoceras cornucopia 



„ Jibulatus, Sowerby ; see Stephanoceras fibulatum 



„ fimhriatus, Sowerby ; see Lytoceras fimbriatum 

 J, „ Simpson ; see Lytoceras cornucopia 



„ Fowleri, Buckman ; see Arietites impendens . 



„ gagateus. Young and Bird ; see Aegoceras gagateum 



„ geometricus, Oppel ; see Arietites semicostatus 



„ Germanii, d'Orbigny ; see Lytoceras hercinum 



„ Greenoughi, Sowerby ; see Amaltheus Greenoughi 



„ Grenouillouxi, d'Orbigny ; see Aegoceras pettos 



„ gubernator, Simpson ; see Lytoceras Jurense . 



„ GmiaKawMS, d'Orbigny ; see Amaltheus Guibalianus 



„ Hagenowii, Dunker ; see Aegoceras planorbis . 



„ halecis, Buckman ; see Arietites Sauzeanus . 



„ hastatus, Young and Bird ; see Aegoceras armatum 



„ Hawskerensis, Young and Bird ; see Amaltheus spinatus 



„ Henleyi, Sowerby ; see Aegoceras Henleyi 



„ heptangularis, Young and Bird ; see Aegoceras striatum 



„ heterogenes. Young and Bird ; see Aegoceras heterogenum 



„ heterophyllus, Sowerby ; see Phylloceras heterophyllum 

 „ „ Amalthei, Quenstedt ; see Phylloceras Zetes 



„ „ numismalis, Quenstedt ; see Phylloceras Loscombi 



„ Mildensis, Young and Bird ; see Harpoceras bifrons 



„ kircinus, Schlotheim ; see Lytoceras hircinum 



„ hybrida, d'Orbigny ; see Aegoceras heterogenum 



„ ibex, Quenstedt ; see Amaltheus ibex 



„ Hiatus, Simpson ; see Aegoceras gagateum 



„ impendens, Young and Bird ; see Arietites impendens 



„ insignis, Schiibler ; see Harpoceras insigne 



„ integricostatus, Simpson ; see Aegoceras gagateum 



„ intermedius, Portlock ; see Aegoceras intermedium 



„ interruptus, Zieten ; see Lytoceras hircinum . 



„ Jamesoni, Simpson ; see Aegoceras sagittarium 



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