158 
PALEONTOLOGY OF NEW YORK. 
In 1876 James Hall indicated and figured six new species of Tentaculites, 
viz., T. arenosus, T. attenuatus, T. bellulus, T. scalariformis, T. sicula * and T. spiculus; 
and also illustrated another form under the name T. fissurella (see page 173 of 
this volume), a species previously described in 1843 ( Illustrations of Devonian 
Fossils, pi. 26, figs. 1-25). 
In the above historical notice, American authors only, or those treating of 
American species of the genus since 1832, have been cited. During this 
period our knowledge of this group of fossils has been greatly increased, chiefly 
by the investigations and writings of European authors, the principal of whom 
are the following: 
Hisinger in 1837 ;f Sir R. I. Murchison in 1839 ; M. he Yerneuil in 1840 
and in 1850; MM. d’Archiac and de Yerneuil in 1842; Count Castelnau in 
1843 (already cited); Dr. F. A. Rcemer in 1843 and 1850 ; Mr. Austin in 1845; 
M. de Yerneuil and Count Keyserling in 1846 ; Prof. Geinitz in 1846 and 
1856 ; M. Alcide d’Orbigny in 1850 ; Prof. Abich in 1850 ; Prof. McCoy, Prof. 
Quenstedt and Prof. Geinitz in 1851 ; M. Barrande in 1852-1865 and 1867 ; 
Drs. G. and Fr. Sandberger in 1850-56 ; Dr. Fr. Sandberger in 1852 ; Prof. 
Geinitz in 1853 ; Dr. Steininger in 1853 ; Dr. Edward Gueranger in 1853 ; 
Prof. Morris in 1854; Dr. R. Richter in 1854, 1856, 1865, 1866 and 1867 ; M. 
Ed. de Yerneuil in 1855 ; Dr. Boll, in 1856, 1859 and 1867 ; Dr. Ferd. Rgemer 
in 1857, 1862 and 1865 ; Chevalier Eichwald in 1857 and 1860 ; Prof. Giebel 
in 1858; Dr. Fr. Schmidt in 1858 and 1859; Messrs. Salter and Morris in 
1859; Prof. Rudolf Ludwig in 1864; Prof. Kjerulf in 1865. | 
In 1867, M. Barrande, in his “ Systeme Silurien du Centre de la Boheme, Tome 
III,” has given a most complete resume of all that has been written in Europe 
and America concerning this group of fossils ; including also the genus Styliola 
of Leseuer. He has likewise presented, in a most complete and satisfactory 
manner, the geological and geographical distribution of these genera in the 
* See pages 159 and 165 of this volume. 
f This author cites Eaton, as referring the Tentaculites to spines of Echinus, “ Aculii Echini gyracantae,” 
and the species cited by him from near Schoharie, N. Y., is evidently the T. gyracanthus. 
X The works of some of these authors are not accessible to the writer, and they are cited upon the testimony 
of M. Barrande. 
