. Bulletin - United States National Museum. Science. EARLY PALEOZOIC BEYOZOA OF THE BALTIC PROVINCES. 153 SCEPTROPORA FACULA Ulrich. Text fig. 74. Sceptroporafacula Ulrich, American Geologist, vol. 1, 1888, p. 228; Contr. Micro- Pal. Cambro-Sil., pt. 2, 1889, p. 46, fig. 2; Geol. Surv. Illinois, vol. 8, 1890, p. 401, fig. 15.—Whiteaves, Pal. Foss., vol. 3, pt. 2, 1895, p. 117.—Simpson, Fourteenth Ann. Rep. State Geologist of New York for the year 1894, 1897, p. 549, fig. 116. Rather numerous specimens of tMs interesting bryozoan occur scattered through the fossihferous layers of the Borldiolm
. Bulletin - United States National Museum. Science. EARLY PALEOZOIC BEYOZOA OF THE BALTIC PROVINCES. 153 SCEPTROPORA FACULA Ulrich. Text fig. 74. Sceptroporafacula Ulrich, American Geologist, vol. 1, 1888, p. 228; Contr. Micro- Pal. Cambro-Sil., pt. 2, 1889, p. 46, fig. 2; Geol. Surv. Illinois, vol. 8, 1890, p. 401, fig. 15.—Whiteaves, Pal. Foss., vol. 3, pt. 2, 1895, p. 117.—Simpson, Fourteenth Ann. Rep. State Geologist of New York for the year 1894, 1897, p. 549, fig. 116. Rather numerous specimens of tMs interesting bryozoan occur scattered through the fossihferous layers of the Borldiolm hmestone. Here the species was first identified by a thin section whicli accident- ally cut one of the segments. Further search in the rock awarded well-preserved typical examples. Ulrich's description is copied below: Segments club-shaped, varying in length from less than 1 mm. to nearly 2 mm.; lower half subcylindrical, about mm. in diameter, noncelluliferous, covered with fine, granulose, vertical strise; lower extremity bulbous, smooth; upper half cellulifer- ous, expanding more or less rapidly, the depressed conical top varying in diameter from to 2 mm. The apertures of the zooecia on the top are subcircular; about Fig. 74.—Scepteopoea facula. a, single segment op Tms fine species, x18; 6, yektical section, X18, through an entire segment; c, teansveese section, XIS, cutting the lowee end of a seg- ment; d, TEANSVEESE SECTION, X18, THROUGH THE EXPANDED CELLULTFEEOUS POETION. RICHMOND GROUP, Stony Mountain, Manitoba. (After Ulrich.) mm. in diameter and arranged in radial series between raised lines about the large central socket. As the zoarium expands the series increase in number by interpola- tion. The apertures of the zooecia on the sides are ovate and a little larger, having an average length of mm. Like those on the top, they are arranged between elevated granulose ridges. None of the arthrostyloid or other Paleozoic bryozoans approaches this
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