XXIV 
SYSTEMATIC INDEX. 
Family KAUTILID^ {continued). 
Page 
Pleuronautilus 134 
Temnocheilus 142 
8. g. Centroceras 163 
Solenocheilus 165 
Nautilus 179 
B. g. Hercoglossa 180 
8. g. Clydonautilus 182 
Aturia 335 
SUPPLEMENT. 
Orthoceras 378 
Actinoceras 382 
Huronia 383 
Meloceras (subgenus of Cyrtoceras) 384 
Families Ascoceratidae and Lituitidac 384 
Lituites 392 
Pleuronautilus 392 
Hercoglossa (subgenus of N autilus) .... 393, 395 
Nautilus 394 
Family JoveUaniidaG 399 
Jovellania 397 
