TUBICOLAR ANNELIDA. 
1868. Meek and Worthen, Tenfaculites. GeoL Survey of Illinois. Geol. 
and Pal., vol. iii. 
1872. Nicholson, On the genera CornuUtes and Tentaculites, and on a new genus 
Conchicolites. Am. Jour. Sci., Third Series, vol. iii, p. 202. 
1872. Nicholson, On Orionia, a new genus of Tubicolar Annelides, with Notes on 
the genus Tentaculites. Geol. Mag., vol. ix, p. 446. 
1873. Description of two new species of Annelides, Conchicolites and 
Ortonia. Geol. Mag., vol. x, p. 54, pi. iv. 
1874. Nicholson, Ortonia intermedia. Geol. Mag., New Series, vol. i. 
1874. S. A. Miller, Tentaculites. Cin. Quart Jour. Sci. 
1878. S. A. Miller and C. B. Dyer, Spirorbis. Jour. Cin. Soc. Nat. 
Hist. 
1879. Hall, Spirorbis [?]. Twenty-eighth Bept. N. Y. State Mus. Nat. Hist. 
1879. Hall, CornuUtes {Annelides). Twenty-eighth Bept. N. Y. State Mus. 
Nat. Hist. 
1884. Bingueberg, CornuUtes. Proc. Acad. Nat. Sci. Phila. 
In the study and description of the species illustrated in the Paleontology 
OF New York, Vol. V, pt. ii, under the generic names of Tentaculites, Styliola, 
CoLEOPRiON, CoLEOLUS, Hyolithes, etc., there appeared little difficulty in recog¬ 
nizing their relations to each other and their nearest affinities as with the 
Pteropoda. The only question arose in considering certain species, which had 
originally been referred to the genus Tentaculites, and of which, in the begin¬ 
ning, I had no knowledge from the actual examination of specimens. 
In the tabular arrangement of the American species of this genus (p. 162, loc. 
cit.) I admitted into the list five forms which had been described as Tentaculites, 
from the Hudson Biver horizon (Cincinnati group). Even before the pages had 
gone to press I began to doubt the generic identity of these forms with true Ten¬ 
taculites, and an examination of the species from the neighborhood of Cincinnati, 
brought confirmatory evidence of my suspicion as to their true affinities. At a 
later date, through the kindness of Mr. S. A. Miller and the late Mr. C. B. Dyer, 
I was enabled to study a collection of specimens which seemed to present a pretty 
complete life-history of those forms described as Tentaculites from the Cincin¬ 
nati region. 
