TABLE OF THE NAFTILOIDEA. 
XXlll 
Family CYETOCERATID^, Cliapman, 1857. 
Cyetoceeas, Goldfuss, 1832. 
s. g. Meloceras, Hyatt, 1883. 
s. g. OocERAS, Hyatt, 1883. 
Family LITUITID^E, Noetling, 1883. 
Lituites, Breyn, 1732. 
s. g. Ophidioceras, Barrande, 1867. 
♦Ancistroceras, Boll, 1857. 
Family TROCHOCERATID^, Zittel, 1884. 
Trochoceras, Barrande, 1847. 
^Adelphoceras, Barrande, 1874. 
Family NAUTILII)^, Owen, 1836. 
Trocholites, Conrad, 1838. 
Gyroceras, de Koninck, 1844. 
s. g. Trigonoceras, M^Coy, 1844. 
Hercoceras, Ban’ande, 1865. 
Uranoceras, Hyatt, 1883. 
Barrandeoceras, Hyatt, 1883. 
Discites, jNBCoy, 1844. 
s. g. Phacoceras, Hyatt, 1883. 
Trematodiscus, Meek & Worthen, 1861. 
Temnocheilus, M^Coy, 1844. 
Vestinautilus, Ryckholt, 1852, emend. Hyatt, 1883. 
Asymptoceras, Ryckholt, 1852, emend. Hyatt, 1883. 
Ephippioceras, Hyatt, 1883. 
Pleuronautjlus, Mojsisovics, 1882. 
Nautilus, Breyn, 1732. 
Hercoglossa, Conrad, 1866. 
Aturia, Bronn, 1838. 
Family BACTRITID^, Hyatt, 1883. 
Bactrites, G. Sandberger, 1841. 
The family or families to which 
these genera should be referred 
not yet satisfactorily determined. 
Gonioceras, Hall, 1847. 
Jovellania^ (Bayle), Foord, 1888. 
’ After Jovellanos, a famous Spanish statesman and poet (1744-1811), born 
at Gijon in Asturias. 
