VINE: NOTES ON FOSSIL POLYZOA. 
391 
the true R. gracile, from the same beds, the differences between 
them are easily recognisable. 
Localities: Brit, forms: Hurst, Yorkshire; American forms: 
Kaskaskia group of Low. Carb. Rocks., Chester, 111., and Tateville 
Ky. (Ulrich). 
In justice both to Mr. Meek and also Mr. Ulrich, I desire to 
make reference to a remark in p. 25 of the Journal of the Cin. Soc, 
Ap., 1884. Mr. Ulrich says "Mr. F. B, Meek, the author of 
Rhombopora, regarded the Genus as belonging to the Polypi (Coel- 
lenterata ?). Against this view I will simply say, that if Rhombopora 
is a coral, then we have no Bryozoa in American Palaeozoic Rocks." 
I would not have cared to state an opinion so dogmatically, but I 
may be allowed to say that I accepted the Genus Rhomhopora as 
described by Mr. Ulrich, for the simple reason that in none of his 
figures the author has given us veritable " tabulae " (Diaphragms), 
except in the doubtful presence in figs. 1 a and 26. R. lepidodendroidea 
and R. crassa, and in his definition of the Genus Rhombopora he says 
*' Diaphragms (tabulce, Nicholson) generally absent, always few." 
3. Streblotrypa Nicklisi, Ulrich (MS., 1884), pi. XXI., figs. 4-5. 
The above is a MS. name, but I have no desire to give another 
to the present form, for several reasons ; but the chief one, how- 
ever, is this. In 1883 Mr. Nickles sent me some specimens of a 
peculiar Polyzoon, which he asked me to identify, if possible, with 
Brit. Carb. forms. I could not at the time, but I wrote him that the 
nearest ally of the American species was the Hyphasmopora BusHi, 
Eth., jun. I told him also that it was not the same species as ours, 
but I considered that it may be well to place it in the same Genus. 
At the same time that he sent mine, he sent Mr. Ulrich some also 
from the Carb. Strata of Kaskaskia, 111. Since then Mr. Nickles 
writes me — Feb. 1884 — to say that Mr. Ulrich had named the species 
as above, in honour of the discoverer, but that as the name was only 
a MS. one, it had no validity. In re-working the whole of my 
un-named species for this paper, I am happy to say that I have 
found a fragment of Streblotrypa Nicklisi among my Yorkshire 
material, and this with the Rhombopora species will show that by 
some means the British and American Carboniferous Polyzoa had a 
