96 
VINE: NOTES ON YOEEDALE POLYZOA, 
Zoarium dendroid, composed of small c^'lindrical stems, often 
bifurcating-, Zocccia arranged in linear longitudinal series, more or 
less separated from one another by a cancellated network or 
reticulation ; cells on the obverse side compressed, and occasionally 
separated from contiguous cells by dividing ridges ; lateral cells 
larger and bordering on the reverse of the stem, which is ahvays 
cancellated and destitute of ZooBcia. Vestibules large pyriform, 
within the depressed or slanting area of which the orifices of the 
conical cells are seen. 
Horizon and Localities : Yoredale ; Gleaston Castle, Holker 
Park, North Lancas. Hurst, North Yorks. ; Northumberland. 
Upper and Lower Shales but very rare. 
This species has a very wide distribution in the Carboniferous 
rocks of Great Britain. The characters, how^ever, though well- 
marked, are likely to be confounded with another species which I 
have already drawn attention to in a previous papei-,''' under the 
name of Streblotri/pa Sicklisi^ MS.. Ulrich. My object in naming 
my Yorkshire specimen after a MS. name, was to draw closer 
attention to Carboniferous British and American Polyzoa than have 
heretofore been done ; but American Pah^ontologists seem to 
misunderstand, or misconstrue, my motive. This I cannot help or 
avoid, and this plain matter-of-fact statement ought to be sufficient 
to prevent misconception for the future. It is necessary in dealing 
with fossils of the same or similar horizons that comparisons should 
be made, and distinctions drawn wdienever possible, and jealousy on 
either side ought to be less regarded than the truth. 
34. Steeblotrypa Nicklisii (Ulrich, MS.) 
aS'. Nicklisii, Vine, Proc. Yorks. Geo!. Soc, Yol. VIII., 1885, i^p. 
107-8, pi. XXL, figs. 4-5. 
This particular species is rather more abundant, in association 
with another form, in the Carboniferous shales than I previously 
contemplated. In the Lancashire Yoredale shales the species is well 
represented, and Mr. John Young showed me lately- several examples 
derived from Scotch local shales. I do not see, however, why 
the species should be separated from a family association with 
* Proceed. York,s. Geo. Soc, XS^o-i, p. 107. 
