22 BRYOZOAN FAUNA OF THE ROCHESTER SHALE. 
Spatiopora maculata (Hall). 
PL VIII, figs. 1-4; PI. IX, figs. 10, 11. 
— Hall, Nat. Hist. New York, Pal. II, 1852, pi. 40E, figs. 7a, b. 
Paleschara maculata Hall, Twenty-eighth Ann. Rept. New York State Mus. (doc. ed.), 1876, pi. 8, figs. 
9, 10; ibid. (Mus. ed.), 1879, p. 121, pi. 8, figs. 9-13. 
Paleschara maculata Hall, Eleventh Ann. Rept. Indiana Geol. Nat. Hist., 1882, p. 246, pi. 7, figs. 9-13. 
Leptotrypa maculata Ulrich, Jour. Cincinnati Soc. Nat. Hist., VI, 1883, p. 158. 
Paleschara? aspera Hall, Twenty-eighth Ann. Rept. New York State Mus. (doc. ed.), 1876, pi. 8, figs. 
11-13. 
Several specimens were found in the Rochester shale agreeing in all respects with typical 
examples of the species from the Waldron shale described by Hall as Paleschara maculata . 
A study of the internal and external features of these in connection with the Waldron 
specimens shows that Hall's species is a Spatiopora with close relation to the Lorraine 
forms S. maculosa and S. lineata Ulrich." The Niagaran form differs from both, however, 
in having considerably larger zooecia. Hall has given good figures of the species and these, 
with a drawing of the surface and internal structure, are reproduced on Pis. VIII and IX. 
Old examples show the well-marked maculae which suggested the specific name, but in young 
specimens the maculae are much less conspicuous, the principal feature being the well- 
marked lineate arrangement of the zooecia. 
The zoarium of #. maculata consists of exceedingly thin expansions, generally incrusting 
the shells of Platystoma, although smooth brachiopods are sometimes selected. Zooecia 
elongate, polygonal, and arranged lineately in young examples, measuring longitudinally 
4 to 5 in 2 mm. and 7 in the same space transversely; hexagonal, and the lineate arrange- 
ment less pronounced in older specimens where 6 zooecia may be counted in 2 mm. With 
age small spines develop until in the most mature specimens the walls inclosing a zooecium 
bear from 12 to 15 of these blunt acanthopore-like structures generally found in Spatiopora. 
Occurrence. — Waldron shale, Waldron, Ind., and Newsom, Tenn.; Rochester shahs Lock- 
port, N. Y., and Grimsby, Ontario. 
Catalogue numbers, 35461, 35462, 35463, U. S. National Museum. 
Family FISTULIPORIDJE TJlrieh.. 
Genus F1STULIPORA McCoy. 
Zoarium massive, lamellate, ramose, parasitic or free; under surface with a wrinkled epi- 
theca; zooecia cylindrical or somewhat compressed, direct or almost so, thin walled until 
near the surface, and provided usually with a few diaphragms, and encircled by one or more 
series of vesicles; apertures subradially arranged about the maculae, ovoid, subtriangular or 
pyriform, the lunarium more or less strongly developed; surface between apertures smooth 
or granular. 
FlSTULIPORA LAMINATA (Hall). 
Pi. VII, figs. 4-6; PI. VIII, figs. 9, 10. 
Callopora laminata Hall, Nat. Hist. New York, Pal. II, 1852, p. 146, pi. 40, figs. 3a-e. 
Leioclcma? laminatum Ulrich, Geol. Survey Illinois, V11I, 1890, pp. 416, 425. 
Lioclema (? Nichols onella) laminatum Nickles and Bassler, Bull. U. S. Geol. Survey No. 173, 1900, p. 304. 
Professor Hall distinguished this species from the associated Callopora (now Nicholsonella) 
f.orida by the much smaller cell apertures, but an examination of his figured type shows that 
it is a specimen of a well-marked species of Fistulipora differing from associated forms of this 
genus in iis laminar growth, small zooecia, and well-developed lunarium. The zooecia are 
usually trilobate in outline because of the well-developed lunarium occupying about one- 
third of the circumference and indenting the cavity. Five to six zooecia may be counted in 
2 mm., while the diameter of an individual zooecium is usually 0.20 mm. In width the inter- 
zocecial spaces average the diameter of the zooecia and are occupied by vesicles, which 
« Jour. Cincinnati Soc. Nat. Hist., VI, 1883, p. 167, pi. 7. 
