272 HISTORY OF BRITISH ZOOPHYTES. 
Statistical Account of the parish of Stevenston,’ of which 
I was then minister, that I had got Discopora verrucaria 
on the Ayrshire coast; and as he had not fallen in with it 
on the coast of Berwickshire, he would take it kind if I 
would send it to him;—which I was most happy to do. 
Dr. Fleming’s generic name was Dzscopora, and he made it 
consist of two species, D. verrucaria and D. hispida. Dr. 
Johnston formed two species of the Discopora or Tubuli- 
pora; the first, 7. patina, which seems a very distinct 
species, and the other, 7. Aispida, which includes a portion 
of Dr. Fleming’s D. verrucaria, viz. T. patina, and also 
his D. hispida, which was regarded by Dr. Fleming as dis- 
tinct from D. verrucaria. Though no friend to the multi- 
plication of species, we should rather be disposed to make 
three species instead of two. JZ. patina seems very dis- 
tinctly one species; and then we would have retained the 
specific name of verrucaria for that state of it which 1s 
truly wart-like, marked however by reticulated grooves; 
and to those specimens which have not these grooves, but 
have the denticles elongated into strong sharp spines, ren- 
dering the surface quite rough, we would have been disposed 
to give the name of 7. hespida. 
The little var. 8 is very common on some saccharine 
