BUFFALO SOCIETY OF NATURAL SCIENCES 25 
FOLYGN MUU S PERNA CU DUS Spec uNoy 
lPilaies. 2S, sates, 2. 
Plate triangular in outline, convex in its longest axis and 
relatively flat or slightly arched transversely. No longitudinal 
central furrow, and the usual central crest indicated only by a 
median row of elongated tubercules. An expanded appendage 
with prominent crenulations or teeth projects beyond the main 
plate. Upper surface of main plate covered with closely 
arranged tubercules. 
Conodont bed of Eighteen Mile Creek. 
FOLYMGNADEUS PUNCIATUS um Di 
1879. Polygnathus punctatus, G. J. Hinde, Quar. Jour. Geol. Soc., 
Voll XXX Ve p.367 (Plate XVI, fies 14: 
_ This species was described by Hinde as occurring in the 
Genesee shale of Eighteen Mile Creek. I have never found it 
in the Conodont bed, and I believe it must be a Portage species 
or even younger, as Dr. Ulrich has informed me that he has 
found it, or a closely related form, in the Chattanoogan shales. 
‘PPOLYGNATHUS LINGUIFORMIS, HINDE 
Plate XI, figs. 1-9: Plate XIV, fig. 2. 
1879. Polygnathus linguiformis, G. J. Hinde, Quart. Journ. Geol. Soc., 
Vol OX XV. p367) Plate XViIl Ge. 15. 
1879. Polygnathus simplex, G. J. Hinde, Quart. Journ. Geol. Soc., 
Well SOOO a. SOL lis SOWIE fe TS 
I illustrate on Plate XI upper views of a number of paired 
plates, the rights and lefts being easily distinguished; and in 
fig. 9 a profile view of the same species. It is hardly to be 
wondered that Dr. Hinde with only specimens in the matrix at 
his command, should have referred differently oriented exam- 
ples to distinct species. The tongue-lke process is ornamented 
on its upper surface with parallel raised lines which sometimes 
break up into tubercules on the elevated portion of the plate. 
Specimens of this species on account of their twisted shapes 
are difficult to photograph. All my specimens are from the 
Conodont bed. Dr. Hinde also reports it from the Genesee ( ?) 
shale on the north shore of Lake Erie, Ontario. 
POLVENAT HUSH TUBER CUI ME US) EuENiIDIE 
Plate XII, figs. 7-9. 
1879. Polygnathus tuberculatus, G. J. Hinde, Quar. Jour. Geol. Soc., 
Vol, XXXV, p. 336, Plate XVII, fig. 9. 
Hinde figured two specimens under this name. Of these, the 
original of his figure 9, according to his description, is clearly to 
be accepted as the type. His figure 10 represents the reverse 
side of a form which is described in this paper under the name 
of Polygnathus rotundilobus. 
