150 
British Isles. In the large bryozoan sample examined in this study 
only 4 specimens were found. 
In his original description Nicholson failed to notice basal dia- 
phragms in the endozone. Lee (1912) redescribed the earlier material 
in which he found ill-defined ‘tabulae’ (basal diaphragms). Conse- 
quently, he correctly placed the specimens in the genus Dyscritella 
and elevated miliaria from variety to specific rank. 
Coefficient of variation values in Table 23 illustrate a number of 
features. Zoarial width (ZW) and autozooecial aperture diameter 
(AD) do not vary greatly either within or between colonies. The 
within-colony ranges of exilazooecial diameter (ED), autozooecial 
spacing (AS), and the number of autozooecia in an area of 1mm (Z1) 
are all large. However, between-colony CVs for these parameters are 
small because all colonies are of a similar size. There is little within- 
colony variation, but large between-colony variation in the number 
of autozooecia in a 2mm line (Z2). This large CV value may be a 
sampling error arising from the small sample size. 
STRATIGRAPHICAL RANGE. Lower Carboniferous (Asbian— 
?Brigantian). 
DISTRIBUTION. Ireland, northern England, North Wales, Midland 
Valley of Scotland, Morocco. 
Family STENOPORIDAE Waagen & Wentzel, 1886 
Genus TABULIPORA Young, 1883a 
TYPE SPECIES. 
the Lower Carboniferous of East Kilbride, Scotland. | 
Tabulipora urii (Fleming, 1828) Figs 67—70, 71a 
1828 
v1883a 
v1883b 
v1883 
1884b 
1912 
1912 
1935 
1953 
1961 
1969 
1970 
1973 
1977 
non v 1986 
1987 
Cellepora urii Fleming, 1828 by monotypy from 
Cellepora urii Fleming: 532. 
Tabulipora urii (Fleming); Young: 154. | 
Tabulipora urii Young; Young: 264. | 
Tabulipora urii Young [sic]; Nicholson: 295. 
Tabulipora urii Young [sic]; Vine: 380, pl. 20, figs 3a— | . 
/ 
P.N. WYSE JACKSON | 
| 
b, 4. | 
Tabulipora urei Young [sic]; Lee: 150. 
Tabulipora scotica Lee: 162, pl.14, figs 4a—d, pl. 15, 
figs 12, 13, 17, 18. 
Tabulipora scotica Lee, Anderson & Lamont: 216, 
fig. 6.13. 
Tabulipora scotica Lee; Bassler: G105, fig. 70 — la, . 
Ib. 1 
Tabulipora scotica Lee; Wilson: 91. 
Tabulipora scotica Lee; Owen: 262, pl. 22, figs d-e. | | 
Tabulipora urii (Fleming); Gautier: 19, pl. 7, fig. 1; pl. 
8, figs 1-2. | 
Tabulipora scotica? Lee; Owen: 302. | 
Tabulipora urii (Fleming); McKinney: 313, pl. 1, fig. 
3 
Tabulipora scotica Lee; Kora & Jux: 91, figs 3, g1-4. ~ 
Tabulipora urii (Fleming); Bancroft: 196. lq 
Figs 67-70 Tabulipora urii (Fleming, 1828); Upper part of the Glencar Limestone (Viséan, Asbian), Sillees River, County Fermanagh; 67, BELUM | 
K 15200, ramose colony fragment; autozooecia with circular to oval shaped apertures arranged over the whole surface, except on monticules; 
mesozooecia are developed between autozooecia, x3; 68, BMNH PD9638, small encrusting colony on 2echinoid spine, consisting of one layer of 
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autozooecia with circular apertures with polygonal-shaped mesozooecia situated between, x40; 69, BMNH PD9472, shallow tangential section showing | 
autozooecial and mesozooecial apertures, and interapertural walls with large acanthostyles at junctions and smaller stylets in between, x35; 70, BELUM) 
K15207; 70a, longitudinal section through thin-walled endozonal area and thickened exozone region; the initial portions of autozooecial chambers lie at) |) 
a high angle to the zoarial surface, but bend at the exozone and become nearly perpendicular to it, x12; 70b, longitudinal section showing exozone and 
autozooecial chambers; ring septae develop at the top of the endozone with eight per autozooecium; septal necks are inflated and deflected interiorly, 
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x20; 70c, longitudinal section showing exozone and autozooecial chambers, and zone of regeneration where the endozone is characteristically thin, x20/ 
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