176 
PALAEONTOLOGY OF NEW YORK. 
slender forms, without surface ornament, great "difficulty will arise in indi¬ 
cating specific distinctions among the Styliola. We may add that in Tcn- 
taculites ( Styliola ) fissurella many of the specimens are expanded or bulbiform 
at the apex, corresponding in this respect with the existing forms of Styliola. 
This feature, however, is not observed in another form here described. 
Since this genus has not heretofore been noticed in America, I cite from M. 
Barrande {Systeme Smirien, pp. 135, 136) the condensed information given, as 
below. 
“ VERTICAL AND HORIZONTAL DISTRIBUTION. 
“We have already shown in our table (p. 123) the vertical and horizontal 
distribution of Styliola with that of Tentaculites, in palaeozoic countries. The 
principal facts established for the first of these two genera are as follows: 
“ 1. Styliola is thus far known only in certain countries of the old continent, 
which appertain, some to the great southern zone, and others to the great central 
zone. None have been found in the palmozoic regions of America, nor in those 
of the north of Europe. 
“2. No species of Styliola has hitherto been observed in the primordial 
Silurian fauna, nor in the second fauna. As the second fauna presents about 
seven distinct species of Tentaculites, spread through many countries, it follows 
that the form which appears the most simple, among these two types, is precisely 
that which has appeared the later during the palaeozoic times, at least accord¬ 
ing to the actual state of our knowledge. 
“ 3. The total number of forms of Styliola, designated by names, is nine. 
The most ancient of these forms made their appearance during the existence 
of the third Silurian fauna, and they have been designated by three specific 
names. They are included in the geographical space occupied by Bohemia, 
Thuringia and the Harz. 
“4. The remaining six described forms belong to the Devonian period, and 
to the countries on the borders of the Rhine, the Harz, Thuringia and Saxony. 
“ We may remark the inequality of their vertical extent. A single form 
( Styl. Iczviga.ta, Rcemer) is found in the schists of Wissenbach, that is to say, in 
the inferior subdivision of the Devonian system, according to the classification 
of Sir Rod. Murchison ( Siluria , p. 419. 1859). Its presence is also indicated 
by Prof. F. A. Rcemer in the Stringocephales limestone of the Harz, that is to 
say, in the middle subdivision. The five other species all belong to the 
superior subdivision of the same system, for they have been found only in the 
Cypridinia schists, and in the formation calk'd Kramenzelstein which makes 
part of the same subdivision. 
“ The following table indicates the vertical range: 
