On a Species of Goniograptus. 425 
Both the Australian and the American specimens clearly 
belong to the family of the Dichograptide, which rank as 
the “earliest siculate graptotites” known. They belong to 
section “b”’ of Prof. Capworth’s “ Analytical table of the 
genera of graptotites” under “ Fam. III” (see Geol. Mag. 
1873, vol. X, table I), where the polypary is described as 
compound, and where the major extremity of the sicula 
gives origin to a funicle, falling under division ‘“II,” where 
the funicle is said to be “once divided giving origin to four 
main polypiferous branches which form the complete poly- 
pary.” Then the genus Goniograptus naturally comes in 
this sub-division, from the manner in which its simple 
celluliferous branches are disposed, would fall under a new 
generic head between “I” and “TI,” or between genera 
Nos. 16 and 17 of the “table of genera, &e.,” as the “four 
main polypiferous branches” “form the complete polypary ”’ 
by giving off simple ceiluliferous branches from both 
margins, giving four generic heads under division IT, ag 
follows :— 
I By continued dichosomous sub-divisions. 
If By giving off simple branches from one margin only. 
III By giving off simple branches from both margins at 
regular intervals. 
[VY By giving off compound branches from both margins. 
The following are amonvst the most salient characters: 
Dimensions are taken from the American form: Sp. No, 1— 
Collected by Mr. Weston in 1886 at Levis, Quebec. 
Length of the funicle : .125 inch. 
Diameter of disc, in the direction of the funicle: .125 inch. 
Breadth of margin of disc, from extremity of the funicle 
to the outer edge or margin: .0625 inch. 
Diameter of disc, in the direction at right angles to the 
funicle: .1 inch, 
Dise with outer margin, concave and produced along the 
non-celluliferous branches or stolons, clasping them, forming 
a winged or alate margin which gradually diminishes in 
breadth from the dise proper, towards the distal extremity 
of the branches. 
