155 
ON THE OCCURRENCE OF DENDROID GRAPTOLITES IX BRITISH 
CARBONIFEROUS ROCKS. 
BY WHEELTON HIND, M.D., B.S., F.R.C.S., F.G.S. 
When collecting in the Pendleside series of Pendle Hill 
for the British Association Committee on Life Zones in the 
British Carboniferous Rocks, ^Ir. D. Tate, collector on the staff 
of the Geological Survey of Scotland, found a curious specimen 
in the shaly Hmestones in Hook Clough. He sent it to me with 
a note that he believed that he had discovered Dictyonema 
in Carboniferous rocks. The specimen was sent to various 
specialists. Mr. R. Kidston expressed his opinion that the 
fossil belonged to Dictyonema, a view with which I agreed. 
Subsequently Mr. Tate, while collecting for the same Committee 
in beds of presumably the same horizon at Poolvash, Isle of 
Man, discovered a specimen of a similar organism in the black 
shales with Posidonomya Becheri. This specimen w^as evident^ 
specifically distinct from the one found on Pendle Hill. I wrote 
a short description of the two forms, under the modest title 
of " Note on Some Dictyonema-like Organisms from the Pendle- 
side Series of Pendle Hill and Poolvash," and it was read at the 
Geological Society on March 25th, 1903. The Society, with 
that caution which characterises the Publication Committee 
when new matters are brought before the Society, decided not 
to publish the note. Subsequently I asked Miss G. Elles to 
examine the fossils, and she wrote : — "I think the specimens 
from Poolvash and Pendle HiU are Dendroid Graptolites without 
a doubt. The Poolvash specimen looks like a Desnograptus, 
and the other is a Callograptus, I think. The Desnograptus is 
more spread out than in other specimens known to me and is 
probably new, but the Callograptus has some very near allies 
in C, Salteri and C. radiatus of the older rocks. The presence 
of the joining bar has generally been regarded as distinctive 
of the genus Dictyonema, but my experience leads me to believe 
