INDEX TO GENERA AND SPECIES. 



491 



Ammonites striatulus, Sowerby ; see Harpoceras striattilum 



striatus, Zieten ; see Aegoceras striatum 



subarmatus. Young and Bird ; see Stephanoceras subarmatum 



subcarinatus, Phillips ; see Phylloceras subcarinatum 



submutictis, Oppel ; see Aegoceras subniutictim 



subnodosus. Young and Bird ; see Arietites subnodosus 



subplanatus, Dumortier ; see Harpoceras exaratum 



su/catits, Simpson ; see Aegoceras Charmassei 



Taylori, Sowerby ; see Aegoceras Taylori 



,, costatus, Quenstedt ; see Aegoceras Taylori 

 „ nodosus, Quenstedt ; see Aegoceras Taylori 



tenellus, Simpson ; see Arietites Collenotii 



tenuicostatus, Young and Bird ; see Lytoceras lineatum 



Terverii, d'Orbigny ; see Phylloceras heteropliyllum 



Thouarsensis, d'Orbigny ; see Harpoceras striatulum 



tortilis, d'Orbigny ; see Aegoceras laqueolus . 



torulosus, Schiibler ; see Lytoceras hircinum . 



torus, d'Orbigny ; see Aegoceras Johnstonii 



transformatus, Simpson ; see Arietites Sauzeaiius 



trapesoidalis, Sowerby ; see Aegoceras catenatum 



Turneri, Sowerby ; see Arietites Turneri 



Valdani, d'Orbigny ; see Aegoceras Valdani . 



variabilis, d'Orbigny ; see Harpoceras variabile 



Walcotti, Sowerby ; see Harpoceras bifrons . 



Zetes, Studer ; see Phylloceras Zetes 



Ziphus, Zieten ; see Aegoceras planicosta 

 Argonauta Ceecilia, Reinecke ; see Harpoceras serpentinura 



serpentinus, Reinecke ; see Harpoceras serpentinum 

 AiciETiTES, Waagen 



bisulcatus, Bruguiere, pis. iii and iv . 



Bonnardii, d'Orbigny, pi. xi, figs. 1 — 3 



Brooki, Sowerby, pi. vi, figs. 4, 5 



Bucklandi, Sowerby, pi. i, figs. 1 — 3 



Collenotii, d'Orbigny, pi. vi, fig. 1 ;i pi. xxiiA, figs, (i — 9 ; pi. xxiiB, figs. 1 — 3 



Conybeari, Sowerby. pi. ii, figs. 1 — 3 



Crossii, Wright, pi. x, figs. 1,2 



impendens, Young and Bird, pi. xxiiA, figs. 1 — 5 



nodotianus, d'Orbigny, pi. xxxvii, figs. 3, 4 



obesuhcs, Tate and Blake, see Arietites subnodosus 



obtusus, Sowerby, pi. xxi, figs. I — 5 . 



raricostatus, Zieten, pi. vii, figs. 2 — 6 ; pi. xxvi, figs. .5 — 14 



rotiformis, Sowerby, pi. v, figs. 1 — 4 ; pi. vii, fig. 1 ; pi. ix, figs. 1 — i 



Sauzeanus, d'Orbigny, pi. viii, figs. 1 — 6 



Scipionianua, d'Orbigny, pi. xiii, figs. 1 — 3 ; pi. xix, figs. 8 — 10 



FAG£ 



. 451 



. 378 



. 477 



. 428 



. 338 



. 288 



. 441 



. 323 



. 348 



. 348 



. 348 



. 304 



. 409 



. 424 



. 451 



. 315 



. 417 



. 311 



. 281 



. 320 



. 292 



. 357 



. 455 



. 436 



. 422 



. 335 



. 433 



. 433 

 267—306 



. 275 



. 287 



. 280 



. 269 



. 304 



. 272 



. 283 



. 302 



. 300 



. 288 



. 293 



. 298 



. 278 



. 281 



. 289 



Named Arietites denotatus on explanation of pi. vi. 



