84 
in a bed of black shale, cut through by a small stream which 
feeds the reservoir, five miles north-east of Middletown: both 
the stream and the shale-bed lie between two of the feldspar 
ridges which run in a north-east and south-west course toward 
the Connecticut river. 
THE PRESIDENT said that the locality is probably new. 
The specimens belonged to the genus Jschypterus, which, with 
Catopterus, is found at Durham, and at various points in the 
Triassic of the Connecticut valley. 
Pror. D. S. Martin exhibited several specimens of 
Dictyophyton tuberosum, Hall, from a (probably) new loeality, 
at Alfred, Alleghany Co. N. Y., where they had been found 
in some abundance and great perfection, by Rev. Dr. J. Allen, 
President of Alfred University, at a horizon just below the 
very top of the Chemung group. 
THE PRESIDENT gave a discussion of the relations of the 
whole group of supposed algee to which these forms belong. 
The tribe was quite peculiar, and apparently has no lving 
representative of any kind. It belongs to the Chemung and 
Wayerly groups, mainly, though found quite low in the 
Devonian; and during certain periods it attained quite a 
marked development, so as to form a characteristic feature in 
some of the beds. One of the first species noticed was that 
described by Vanuxem under the name of Uphantena 
chemungensis, a wide-spread reticulated frond, of which we 
have but imperfect specimens. (Geol. N. Y., vol. 3, p. 183.) 
Dictyophyton is generally cyathiform, or cup-like, varying in 
different species from cylindrical to widely funnel-shaped. 
In both the earlier and later Devonian, the genus Spirophyton, 
one species of which is so characteristic of the lowest member 
of the Corniferous period in New York and Pennsylvania, 
under the name of Fucoides Cauda-galli, doubtless belongs 
to the same group. Its form was spiral funnel-shaped, much 
like that of the Archimedes; and the familiar “ cock’s-tail” 
outline is given by looking down on the crushed and flattened 
top of the fossil. 
