. Annals of the New York Academy of Sciences. Science. North Amerioav, Cai'bo)iiferoHs Trilohites. 60 ^'l. — Tlic Genera and Sj)edes of North American Carbuniferoiis. Trilohites. BY AXTHONY W. YOGDES. Read, March ^th, 188r. CUXTENTS :— I. Int]-oduction. II. ChiFsification of the Carboniferous strata of the United States. III. The genus Proetiis, Steininger. ].V. The genus FhilUpsia, Portlock. V. The genus GriffitJUdes, Portlock. VI. 'Jlie gt nus Bracliymetopiis, McCoy. \\l. Desci'iption of tlie American species, with remarks. I. —InTROD UCTIOis'. The known Carboniferous Trih>bites of North
. Annals of the New York Academy of Sciences. Science. North Amerioav, Cai'bo)iiferoHs Trilohites. 60 ^'l. — Tlic Genera and Sj)edes of North American Carbuniferoiis. Trilohites. BY AXTHONY W. YOGDES. Read, March ^th, 188r. CUXTENTS :— I. Int]-oduction. II. ChiFsification of the Carboniferous strata of the United States. III. The genus Proetiis, Steininger. ].V. The genus FhilUpsia, Portlock. V. The genus GriffitJUdes, Portlock. VI. 'Jlie gt nus Bracliymetopiis, McCoy. \\l. Desci'iption of tlie American species, with remarks. I. —InTROD UCTIOis'. The known Carboniferous Trih>bites of North America con- sist of several species of the genus Proetiis, ranging from the Che- mung to the Waverly series ; twelve species of the genus Phil- lipsia, viz. : P. insignis, P. Doris, P. Rockfordensis, of the Waverly series ; Phillipna tuberculata, Burlington series ; P. Mcramecensia, Keokuk ; P. Stevensoni, Chester series ; P. Hoiui, and P. F//z<Zo&*S'.? Lower Carboniferous, and four sj^ecies from the Middle and Upper Coal Measures. The genus Grif- fithides has five species, which range from the Keokuk to the Coal Measures. Brachymetopns has only one species, appearing in the Waverly series. The following brief diagnosis of the characters may be found of use in separating the genera :. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Academy of Sciences. New York, New York Academy of Sciences
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1877
