NORTH AMERICAN GRAPTOLITES 99 
[Graptolithus Linnaeus—con?'d. | 
logani Hall, 1858. 
milesi Hall, 1861. 
multifasciatus Hall, 1850. 
nitidus Hall, 1858. 
octobrachiatus Hall, 1858. 
octonarius Hall, 1858. 
patulus Hall, 1858. 
pennatulus Hall, 1865. 
quadribrachiatus Hall, 1858. 
quadrimucronatus Hall, 1865. 
ramulus Hall, 1865. 
richardsoni Hall, 1865. 
sagittarius (Linnzeus) Hall, 1847. 
scalaris (Linnzeus) Hall, 1847. 
serratulus Hall, 1847, 
similis Hall, 1865. 
subtenuis Hall, 1877. 
whitianus Miller, 1883. 
Inocaulis Hall, 1852. 
anastomotica Ringueberg, 1888. 
arbuscula Ulrich, 1879. 
bellus Hall and Whitfield, 1875. 
cervicornis Spencer, 1884. 
diffusus Spencer, 1884. 
divaricatus Hall, 1870. 
phycoides Spencer, 1884. 
plumulosus Hall, 1851. 
problematicus Spencer, 1878. 
ramulosus Spencer, 1884. 
walkeri Spencer, 1884. 
[Should be dropped entirely. | 
Dichograpsus logani. 
Dichograpsus milesi. 
Clematograptus multifaciatus. 
Didymograpsus nitidus. 
Dichograpsus octobrachiatus. 
Dichograpsus octonarius. 
Didymograpsus patulus. 
Didymograpsus pennatulus. 
Tetragrapsus quadribrachiatus. 
Diplograpsis quadrimucronatus. 
Dichograpsus ramulus. 
Holograptus ? richardsoni. 
Didymograpsus sagitticaulis. 
A thoroughly bad species.?° 
Didymograpsus serratulus. 
Didymograpsus similis. 
Leptograptus subtenuis. 
Dicranograptus nicholsoni 
whitianus. 
Hlolograptus Holm, 1881. Type A. 
expansum. 
? richardsoni (Hall), 1865. 
Inocaulis Hall, 1851.73 
anastomotica Ringueberg, 1888. 
arbuscula Ulrich, 1870. 
bellus Hall and Whitfield, 1875. 
cervicornis Spencer, 1884. 
diffusus Spencer, 1884. 
divaricatus Hall, 1870. 
phycoides Spencer, 1884. 
plumulosus Hall, 185-. 
? problematicus Spencer, 1878. 
ramulosus Spencer, 1884. 
walkeri Spencer, 1884. 
Lastograpius Lapworth, 1873.7 Type 
L. costatus Lapw. 
bimucronatus (Nicholson), 1869.%3 
mucronatus (Hall), 1847. 
Leptograptus Lapworth, 1873. 
annectans (Walcott), 1879. 
flaccidus (Hall), 1865. 
subtenuis (Hall), 1877. 
