94 CARBONIFEROUS FLORA—HONEYMAN. 
Our first specimen is a cast of a stipe in clay slate. Its length 
is73mm., and width 6 mm. Attached to it are 23 Spirorbes; all 
are sinistral. I found this specimen at the McAulay Mine 
(Gowrie Mine), Cape Breton, in 1861. 
Specimen second is a piece of clay slate, having six fronds of 
sphenopteris. Attached to five of these we have seven Spirorbes. 
All are on the outside of the fronds; all are sinistral. The speci- 
men belongs to Mr. Barnes’ Cape Breton collection. 
The third specimen is a sigillaria, which I found at South 
Joggins. In the scars of this we find 12 distinct Spirorbes, and 
there is another plant on the back of the specimen. All appear 
sinistral. They are evidently casts of the basis of dextral 
forms. 
As an illustration IT show an alga, a common melanosperm, 
with a large number of attached Spirorbes, whose apex after 
the removal of the anneloid tube would make casts having a 
resemblance (with a specific difference) to that of the old Car- 
boniferous forms. I am surprised to find that there ever was 
any difference of opinion entertained in reference to the character 
of these Carboniferous forms. 
