424 Canadian Record of Science. 
diagonally across the flattened and expanded polypary from 
tip to tip, and is presented on a slab of shale nearly five 
inches square. 
The affinity and close relationship of this Canadian 
Goniograptus to the Australian one was noticed at a glance, 
and as the individual was comparatively large, and. pre- 
sented other characters (the disc, &c.) not seen nor 
described in the Australian form, it was at first doubtfully 
referred to Prof. McCoy’s species Goniograptus Thureani 
and probably new. 
In 1887, Dr. Selwyn, accompanied by Messrs. Weston 
and Lambe of the Canadian Survey, examined numerous 
graptolitic and other fossiliferous localities along the south 
shore of the St. Lawrence, and in the collections made by 
the two last named gentlemen were found three additional 
specimens of the genus Goniograptus from the same locality. 
All of these are evidently referable to the same genus 
and species, although three of them have a disc preserved 
which is developed around and clasps the funicle as well as 
the non-celluliferous branches or stolons, from the sicula or 
initial point of the polypary to the base of the last bifur- 
cation of the last branch or stolon into the celluliferous 
stipe. 
When compared with the admirable figures and des- 
cription given by Prof. McCoy of its Australian congener, 
the American form is found to be so nearly identical and 
clearly co-specific that it is not deemed advisable to give it 
a new specific designation. The presence of a disc around 
the funicle ,and the pterate, or winged margin along both 
sides of the non-celluliferous branches, the large number of 
stipes originating at the goniate portion of the polypary are 
the main points of distinction, between these two geo- 
graphically remote representatives of the species. 
The disc and winged margin, however, are characters of 
generic importance, whilst the number of celluliferous 
branches originating at the angles of the non-celluliferous 
branches or extremity of the stolons are merely characters 
of age and size of specific value. 
