472 Thirty-fifth Report on the State Museum. 



transverse striae. There is a stronger striation along the middle of 

 each face. 



The length of the specimen described, which is the only one yet 

 observed, and is imperfect in the upper part, is 130 mm., with a greatest 

 diameter in the upper part of 45 mm. 



Formation and locality. In the Chemung group ; Randolph, Cat- 

 taraugus county, N. Y. 



DlCTYOPHYTON ANNULATUM. , 



Plate 18, Fig. 5. 



Dictyophyton annulatwn, Hall. Sixteenth Rept. State Cab. Nat. Hist., p. 90, 



pi. 3, fig. 3. 1863. 



Cup cylindrical, annulated, without nodes, and having a finely 

 reticulate surface. 



The fragment has a length of 60 mm., with a diameter of 16-18 

 mm. between the annulations. 



Formation and locality. Chemung group ; western part of New 

 York. 



Dictyophyton cinctum, n. sp. 



Cup elongate, turbinate or subcylindrical. Base unknown. 



Surface very finely reticulated, with the distinction between the 

 finer and coarser striae very subordinate. Tube strongly annulated ; 

 annulations abrupt, subequidistant. The depressions are about equal 

 in width to the annulations. There are six annulations in the length 

 of 85 mm. on one side of a large specimen, and upon the other side 

 there are four annulations in the length of 65 mm. 



The entire dimensions of the cup are unknown. A fragment much 

 compressed, and preserving a length of 110 mm., has a width of 120 

 mm. in its compressed condition, and shows very little diminution in 

 the diameter of the tube in the length of the fragment. A small 

 specimen in the same association has a length of 53 mm., with a di- 

 ameter at the larger end of 12 mm., and at the base, which is imper- 

 fect, of 7 mm. The tube shows eight annulations ; the five 

 upper ones being somewhat flattened and with a depression along their 

 summits, showing a tendency to duplication. In the depressions be- 

 tween the annulations there is a stronger concentric striation. 



Formation and locality. In a sandstone of the Chemung group ; 

 from a boulder at Erie, Pa. 



Dictyophyton nodosum. 



Plate 18, Fig. 6. 



Dictyophyton nodosum, Hall. Sixteenth , Ann. Rept. State Cab. Nat. Hist., 

 p. 91, pi. 3, fig. 2. 1863. 



Cup prismatic, very gradually enlarging above. Base unknown. 

 Surface somewhat strongly reticulate ; angles bearing strong rounded 

 nodes. 



