i34 



NEW YORK STATE MUSEUM 



*Dicranograptus contortus Ruedemann, 

 1907 

 dissimilaris (Emmons), 1856 

 (=Dicranog. sp. indet.) 

 *divaricatus (Hall), 1859 



[see Dicellog.] 

 *furcatus (Hall), 1847 



*var. exilis Ruedemann, 1907 

 ?inequalis (Emmons), 1856 

 (=?Dicranog. sp. indet.) 

 *nicholsoni Hopkinson, 1870 



var. arkansasensis Gurley, 1896 

 [see Dicr. ramosus] 

 *var. diapason Gurley, 1896 

 *var. parvangulus Gurley, 1892 

 var. whitianus Miller, 1893 

 *ramosus Hall, 1847 



var. arkansasensis (Gurley), 1896 

 rectus Hopkinson, 1872 

 *sextans (Hall), 1847 



[see Dicellog.] 

 *spinifer Elles & Wood, 1904 



*var. geniculatus Ruedemann, 1907 

 Didymograptus McCoy, 1851 

 *acutidens Lapworth, 1901 



arcuatus (Hall), 1865 

 *bifidus (//a//), 1858 



bipunctatus Gurley, 1896 

 *caduceus (Salter), 1853 



*mut. nanus Ruedemann, 1904 

 *constrictus (Hall), 1858 

 (=D. extensus et al.) 

 *convexus Gurley, 1896 

 (=sagitticaulis Gurl.) 

 *cuspidatus Ruedemann, 1904 

 (?)elegans (Emmons), 1856 

 *ellesae' Ruedemann, 1904 



D. euodus Lapworth, 1875 

 *extensus (Hall), 1858 



extenuatus (Hall), 1865 

 :1: nliformis Ruedemann, 1904 

 *forcipiformis Ruedemann, 1904 



furcillatus Lapworth, 1875 

 "'gracilis Tomquist, 1891 



hirundo Salter, 1863 

 :|: incertus Ruedemann, 1904 

 indentus (Hall), 1858 



var. nanus Lapworth. 1875 

 (=nanus) 

 "nanus Lapworth, 1875 

 :|: nicholsoni Lapworth var. planus £7/<?s 



ct - Woocf, 1 901 

 *nitidus (Hall), 1858 

 ::: patulus (Hall), 1858 

 pennatulus (Hall), 1858 

 perflexus Gurley, 1896 

 (?)rectus (Emmons), 1856 

 ^Sagittarius (Hall), 1847 



(=sagitticaulis) 

 *sagitticaulis Gurley, 1896 

 :;: serratulus (Hall), 1847 

 :;: similis (Hall), 1865 

 *spinosus Ruedemann, 1904 

 :|: subtenuis (Hall), 1877 



c/. superstes Lapworth, 1876 

 ^tenuis (Hall), 1847 



(=subtenuis) 

 *tc">rnquisti Ruedemann, 1904 

 Grapt:>lithus Lm; ;;<•', i7.;<> 

 abnormis Hall, 1858 



[see Clonog.] 



a/aftw Hall, 1858 



[we Tetrag.] 



» la correction of the erroneous "ellesi." 



