EAELY PALEOZOIC BKYOZOA OF THE BALTIC PROVINCES. 109 

 Genus FISTULIPORA McCoy. 



Fistulipora McCoy, Ann. and Mag. Nat. Hist., ser. 2, vol. 3, 1850, p. 131. — Milne- 

 Edwards and Haime, Pol. Foss. Terr. Pal., 1851, p. 219. — Milne-Edwards 

 Hist. Nat. des Corall., vol. 3, 1860, p. 238.— Nicholson, Pal. Prov. Ontario, 

 1874, p. 63. — Dybowski, Verb. Mineral. Gesell. St. Petersburg, vol. 10, 1876, 

 p. 180.— Nicholson, Pal. Tabulate Corals, 1879, p. 292; The Genus Monticu- 

 lipora, 1881, p. 91. — Nicholson and Foord, Ann. and Mag. Nat. Hist., ser. 

 5, vol. 16, 1885, p. 500.— Ulrich, Geol. Surv. Illinois, vol. 8, 1890, pp. 382, 

 474.— Nickles and Bassler, Bull. 173, U. S. Geol. Surv., 1900, pp. 25, 266.— 

 Bassler, Bull. 292, U. S. Geol. Surv., 1906, p. 22.— Hennig, Arcbiv fur 

 Zool., vol. 4, No. 21, 1908, p. 16. 



Didymopora Ulrich, Journ. Cincinnati Soc. Nat. Hist., vol. 5, 1882, p. 156. 



DyhowsJda Waagen and Pichl, Pal. Indica, ser. 13, 1886, pp. 717. 



DyhowsMella Waagen and Wbntzel, Pal. Indica, ser. 13, 1886, pp. 910, 916. 



Lichenalia (not Hall, 1852) Hall and Simpson, Nat. Hist. New York, Pal., vol. 6, 

 1887, p. xvi. — Miller, North Amer. Geol. and Pal., 1889, p. 311.— Simpson, 

 Foiu'teenth Ann. Rep. State Geologist of New York for the year 1894, 1897, 

 p. 559. 



FistuKporella Simpson, Fourteenth Ann. Rep. State Geologist New York for the 

 year 1894, 1897, p. 560. 



Zoarium ranging in the various species from incrusting to massive 

 and subramose. Zooecia more or less rounded with a distinct luna- 

 rium. Interzooecial spaces smooth or granulose at the surface, 

 occupied internally by one or more series of vesicles. 



Genotype. — Fistulipora minor McCoy. Carboniferous of England. 



The following new species can not be considered anything else than 

 a primitive Fistulipora. It possesses the generic characters of a 

 lunarium and vesicular interspaces, but the lunarium is poorly out- 

 lined, and, indeed, when best shown it appears as only a broad curve 

 at one end of the cell. The vesicular interspaces also at times have 

 the tabulated aspect of the mesopores in some of the ceramoporoids. 



FISTULIPORA PRIM.EVA, new species. 

 Text fig. 40. 



Zoarium a small, elongate, dome-shaped mass, 12 mm. in height 

 and 9 mm. wide. Surface smooth and exhibiting large, rounded 

 zooecial apertures, isolated from each other by closed interspaces. 

 Distinct maculae of closed mesopores and larger zocecia on a plane 

 with the surface, at intervals of about 4 mm., measuring from center 

 to center. Zooecial apertures irregularly rounded, averaging 0.36 

 mm. in diameter, with three in 2 mm. Lunarium represented by an 

 obscure broad curve occupying the anterior third of the cell wall, little 

 raised above the general surface. Interspaces averaging the zocEcial 

 diameter in width, closed at the surface by a thin covering through 

 which the openings of the vesicular species are indistinctly visible. 

 Large, distinct granular spines dot the surface of these spaces and 

 sometimes occur on the cell wall. 



