-; 



CHRONOLOGICAL 



Plate. 

 f. — hoplophorus. 

 Peltomorphites hoplophorus, nov. G.-t 564a, b. 



e. — plastum [Plasmatoceras] . 



Plasmatites crenulatus, nov. G.-t 618 



Plasmatoceras plastum, nov. G.-t 617 



d. — arduennensis. 

 Peltoceratoides intertextus, Simpson sp. 1855 . . 662 

 torosus, Oppel sp. icSoo 563 



c. — suessi. 



b . — ^pvcBC or datum . 



a. — cardia. 



Cardioceras anacanthum, nov 703 



costcllatum, nov 616a, b. 



costicardia, nov 633 



quadrarium, nov 690 



Hortoniceras sidericum, nov. G.-t 296 



32. Vertumniceratan. 



h. — gregarium. 

 Prorsiceras gregarium, Bean-Leckenby sp. G.-t.".. 117a, b. II xii, 18. 



g. — silphouense. 

 Aspidoceras silphouense, Young & Bird sp. 1822 . . 364a. IV ii, 23. 



364b. IV iv, 23. 



/. — sutherlandics . 

 Sutherlandiceras albisaxeum, nov. G.-t 320a, b. IV vi, 22. 



e. — ordinarium. 



Eboraciceras cadiforme, nov 405 IV 



ordinarium, Bean-Leckenby sp. 1859 171 III 



d. — vertumnus. 

 Alligaticeras [Dichotomoceras] alligatum, 



Bean-Leckenby sp. 1859. G.-t 212 III 



Eboraciceras dissimile, Brown sp. 1849. G.-t. .. 118a. II 



Pavloviceras bathyomphalum, S. Buckman 1920 . . 196 III 



omphaloides, J. Sowerby sp. 1819 . . 195 III 



pavlowi, R. Douville sp. 1912. G.-t. 170 III 



stibarum, S. Buckman 1920 .. .. 197 III 



Poculisphinctes auricularis, nov 186 III 



poculum, Bean-Leckenby sp. 1859. 



G.-t 185 III 



Putealiceras puteale, Leckenby sp. 1859. G.-t. .. 297 IV 



Quenstedtoceras williamsoni, nov 11 8b. II 



Vertumniceras damoni, Nikitin sp. 1889 116b. II 



spatiatum, nov 116c. II 



vertumnus, Bean-Leckenby sp. 1859. 



G.-t 116a. II vii, 18. 



c. — Pachyceras. 

 Pachyceras rugosum, Leckenby sp. 1859 .. .. 115 II vii, 18. 



b. — renggeri. 

 PScarburgiceras scarburgense, Young & Bird sp. 1828. 



G.-t 508 V viii, 24. 



a. — navicula [renggeri]. 

 Scaphitodites navicula, nov. G.-t 459 V ii, 24. 



