JANUAKY, 11)02. MONKOE lIAMILTOiX FOSSILS FROM BKTHANY, N. Y. 
Whiteaves was the first to point out that Hederella fiiiformis 
(Nicholson) is not the same as BiUings's Aulopora Uliforinis, and 
he gives a drawing of BiUings's type specimen showing the latter 
to be truly an Aulopora. The writer collected a single fine speci- 
men at Thedford which corresponds exactly with Whiteaves's 
drawing, and appears to be identical with specimens of Aulopora 
iozmeiisis Hall and Whitfield, previously collected at Hackberry, 
la. If this identification is correct the latter name has priority 
over Billings's; and Hederella filifoniiis must be credited to Nich- 
olson and not to Billings. 
Specimens of Favosites clausiis, both from Thedford and Beth- 
any, show a tendencv to laminar exoansion and the species may be 
merely a variety of F. placenta. It is a question whether Cysti- 
phylhim corrugatum Hall, from Bethany, is not identical with 
C. vesiculosum Goldf., noted by Nicholson from Thedford. 
There were collected at Bethany three species, at least, which 
were originally described from Iowa. These are Stromatopora ex- 
pansa, Stromatoporella incrustans and Lioclema occidens. The 
latter is not known to have been hitherto reported from New York. 
It is an abundant species at Hackberry, la., Callaway County, Mo., 
and Milwaukee. .\ number of solid forms, apparently of this 
species, were collected at Bethany. Other interesting examples of 
species originally described from western localities are Astrae- 
ospongia hamiltoncusis and Intrapora puteolata, of each of which 
a beautiful example was obtained. 
The crinoid above referred to most nearly resembles Thyla- 
cocrinus clarkei Wachsmuth and Springer, but differs from the 
illustration given of that species in this, that the apices of the 
angles of the polygonal plates have a truncated appearance, or 
rather theappearance of havingbeen pushed inward by some sharp 
instrument which has j)erforated the calyx at the points of junc- 
ture of the plates. This ])ethany species cannot be very rare, for 
the writer has another specimen of the same kind which was col- 
lected at Canadaigua Lake. 
Several hundred specimens belonging to the genus Fistiilipora 
and related genera were collected and much time has been spent 
in their study and determmation. The w^orks consulted are Hall 
and Simpson's volume on the New York Bryo^oa, Ulrich's work 
on the Bryozoa of Illinois, Nickles and Bassler's Synopsis of 
American Fossil Bryozoa, Nicholson's Reports on the Paleontol- 
ogy of Ontario, and papers by Nicholson in the Annals and Mag- 
azine of Natural Plistory and bv Rominger in the Transactions 
of the Philadelphia Academy of Sciences. With such a quantity of 
good material it was not anticipated that there would be much dif- 
