ANGUS BROOK, NEW CANAAN AND KENTVILLE.—AMI. 449 
Dictyonema flabelliforme, Eichwald, which finds a synonym in 
the D. sociale, Salter, a characteristic Upper Cambrian fossil. 
In his “ Niagara Fossils,’ Part I, Graptolitidz of the Upper 
Silurian, Prof. J. W. Spencer writes of Dictyonema Websteri, 
Dawson :— 
“This beautiful frond occurs at New Canaan, Nova Scotia, in 
fawn-colored slate of the Upper Silurian System. It is celluli- 
ferous on one side, and in appearance it is more closely related 
to D. retiforme than to D. gracile.” 
In comparing the microscopical characters of D. Websteri with 
those of D. flabelliforme, Eichwald, especially as they are pre- 
sented and illustrated in Carl Wiman’s classic work+ the relative 
size and proportions of the peculiar rope-like structure of the 
main skeleton in the rhabdosome is clearly discernible, so that 
there is practically no doubt as to the identity of the two 
species. 
It will therefore now be necessary to refer D. Websteri, as a 
synonym of D. flabelliforme, Eichwald, and to refer the Kent- 
ville formation, not to the Silurian (Upper) System, but to the 
Cambrian. In fact, the slates of the Kentville formation of 
Kings and Annapolis Counties in Nova Scotia, are equivalent in 
age or are taxonomically similar to the slates of Barachois, and 
associated localities in the Mira Series of Cape Breton, as well as 
to the Dictyonema slates of Navy Island, near St. John City, 
and the slates of Eel River, near Benton, in New Brunswick, 
All of these are referable to the Upper Cambrian. 
The first rapprochement made between Dictyonema flabelli- 
forme and D, Websteri, took place some two years ago when the 
Dictyonema, obtained by Prof. L. W. Bailey, near Benton, along 
the Kel River, in York Co., N. B., was compared with the 
specimens of D. Websteri, at present in the collections of the 
Geological Survey Department, and they were found to be so 
closely related as not to be practically separable. From speci- 
mens of D. flabelliforme, obtained on Navy Island, and kindly 
* See Bull. Mus. Univ., State of Missouri, vol. I, no 1, p. 26, St. Louis, 1884, 
ee Ueber die Graptoliten, Bull. Geol. Inst. Upsala. Pl. x, figures 13 and 14, p. 55, 
