188 vine: YORKSHIRE CARBONIFEROUS AND PERMIAN POLYZOA. 
it provisionally to Ceriopora ow account of its close relationshij) to 
C. punctata, Goldf., which likewise occurs in the Devonian rocks." 
In Mr. Ulrich's " Waverly Bryozoa," already referred to, the 
author describes eight species, one doubtful, of Htrehlotrypa, only 
one of wdiich, *S'. major, Ul., can claim relationship with British 
forms of the Hyphasmoporidse. It is well, therefore, for the student 
of Palaeozoic Polyzoa to bear in mind that the species cited by 
Nicholson in the above quotation are now very widely separated both 
by himself and Ulrich, consequently the affinity, or apparent affini- 
ties, as suggested are somewhat doubtful. Probably the Millipora 
interporosa, PhilL, is a coral (Hydrozoon) rather than a Polyzoon. 
Genus Hyphasmopora, Eth. Jun. 
1875. Ann. Mag. Nat. Hist. Ser. 4, vol. xv., pp. 43-45. 
Zoarium, composed of small cylindrical stems, often bifurcating. 
Zooecia arranged in linear longitudinal series, the vestibules of which 
are separated from each other by cancellated" or reticulated" 
interspaces. Vestibules^ large, oval, or pyriform, slanting inwards, at 
the base of which are the true circular zocecial apertures. The vesti- 
bular openings are found on three sides of the stem only, and the 
reverse, if such a term is allowable for cylindrical stems, are wholly 
reticulated. Gonocysts, inflated sacs., having an opening on the top, 
or upper side, and reticulated on the exposed surface of the sac, like 
the reverse of the stem. 
Hyphasmopora Buskii, Eth. Jun. (pi. vii., fig. 4.) 
1875. Ann. Mag. Natural Hist., Ser. 4, vol. xv., pp. 43-45, pi. iv., 
figs. 1-4. 
1882. Hyphasmopora Buskii, Vine, Proc. Yorks. Geol. Soc, vol. vii., 
p. 337, pi. xvi., fig. 6. 
1883. „ „ Vine, Proc. Yorks. Geol. Soc, vol. ix., 
p. 26. 
1884. „ „ Vine, Yorks. " Naturalist," Oct., p. 64. 
1885. „ „ Vine, „ „ Sept., p. 316. 
This species is found in the Scotch, Northumberland, Lancashire 
and Yorkshire shales, but it is by no means so abundant in the 
English Carboniferous, as in the Scotch shales. The chief interest in 
the present reference to the species is on account of the ovicells. 
