On a Species of Goniograptus. 423 
isreferred to Graptotites (Didymograpsus) Thureani (McCoy) 
with the same note and suggestion regarding the genus 
Goniograptus as given above. 
In vol. ILI, section 5, of the Annals and Magazine of Natural 
History, Prof. Charles Lapworth recognises the validity of 
the genus Goniograptus, and refers the Victorian form to 
that genus, viz.: Goniograptus Thureani, McCoy; (see 
“the Geological distribution of the Rhabdophora” p. 80) 
in the table shewing the vertical range of British Rhab- 
dophora. 
The following is the description given of Goniograptus 
Thureani, by Prof. McCoy. 
“ DescripTion.—Radicle conical, minute, in the middle of 
a short straight funicle, one and a half lines long, which 
bifurcates equally at each end, giving rise to four equal 
main branches or stolons of the complete polypidom ; each 
branch about one inch long, bent regularly in zigzag angles 
of about 135° alternately giving off at intervals of about 
one line, on both sides from the salient angles, the regular, 
straight, simple stems, five or six in number on each side, 
and about one inch in length (more or less, as they are 
nearer the base or the apex), each with a row of broad 
acutely angular cell-denticles, seven in the space of three 
lines; the upper edge of each cell slightly convex, and 
nearly at right angles with the back; and rather longer 
than the undivided portion, the lower edge two-thirds un- 
covered by the next cell, and making an angle of about 
45° with the back; from the point of one cell to the next 
about equal to the width from the same point to the back, 
The whole polypidom, of about forty stems forms a slightly 
quadrate circle or rounded square about two inches in 
diameter.” 
In 1886, Mr. 'T. C. Weston of the Canadian Geological 
Survey, obtained the first American example of the typical 
genus Goniograptus from the black graptolitie and linguli- 
ferous beds, in the cutting on the Intercolonial Railway, 
1560 paces below the Lower Levis and Quebec Ferry, Levis 
Quebec, This specimen measures about seven inches 
