282 AMERICAN FOSSIL BRYOZOA. [bull. 173. 



Hederella filiformis (Billings) — Continued. 



1883. Hederella filiformis. Hall, Trans. Albany Institute, X, p. 194 (abstract, 



1881, p. 194). 



1884. Hederella filiformis. Hall, Rep. State Geologist New York for the year 



1883, p. 54. 

 1887. Hederella filiformis. Hall and Simpson, Pal. New York, VI, p. 278, pi. 

 Ixv, 9-11. 



1897. Hederella filiformi.s. Whiteaves, Contr. Canadian Pal., I, p. 211, pi. xxix,l. 

 1899. Hederella filiformis. Grabau, Bull. Buffalo Soc. Nat. Sci., VI, p. 179, 



fig. 77A. 

 Hamilton: Arkona, Ontario; Livingston, Ontario, and Erie counties, New 

 York. 



Hederella magna Hall. 



1883. Hederella magna. Hall, Trans. Albany Institute, X, p. 195 (abstract, 



1881, p. 195). 



1884. Hederella magna. Hall, Rep. State Geologist New York for the year 



1883, p. 55. 

 1887. Hederella magna. Hall and Simpson, Pal. New York, VI, p. 280, pi. Ixv, 15. 



1898. Hederella magna. Whiteaves, Contr. Canadian Pal., I, Part V, {>. 382. 

 Hamilton: York, and Erie County, New York. 



HELICOPORA Cla^'pole. GenoU^pe: Helicopora latispiralis Claypole. 

 1881. Helicopora. Claypole, Proc. American Assoc. Adv. Sci., XXX, p. 191. 

 1883. Helicopora. Claypole, Quar. Jour. Geo!. Soc. London, XXXIX, p. 32. 



1885. Helicopora. Waagen and Pichl, Pal. Indica, Ser. XIII, p. 774. 



1886. Helicopora. Ulrich, Contr. American Pal., I, p. 5. 



1889. HeHcopora. Miller, North American Geol. Pal., p. 308. 



1890. HeHcopora. Ulrich, Geol. Surv. Illinois, VIII, p. 396. 



1895. Helicopora. Simpson, Thirteenth Ann. Rep. State Geologist New York 



for the year 1893, pp. 722, 726; Forty-seventh Ann. Rep. New York 

 State Museum, pp. 916, 920. 



1896. Helicopora. Ulrich, Zittel's Textb. Pal. (Engl, ed.), p. 282. 



1897. Helicopora. Simpson, Fourteenth Ann. Rep. State Geologist New York 



for the year 1894, pp. 517, 522. 



Helicopora archimediformis Claypole, See Archimedes laxus (Hall). 



Helicopora latispiralis Claypole, 



1881. Helicopora latispiralis. Claypole, Proc. American Assoc. Adv. Sci., XXX, 



p. 191. 

 1883. Helicopora latispiralis. Claypole, Quar. Jour. Geol. Soc. London, XXXIX, 



p. 32, pi. iv, 1, Iffl. 

 1897. Helicopora latispiralis. Simpson, Fourteenth Ann. Rep. State Geologist 

 New York for the year 1894, fig. 70, 1 (p. 518). 

 Niagara: Cedarville, Greene County, Ohio. 



Helicopora ulrichi Claypole, 



1883. Helicopora ulrichi. Claypole, Quar. Jour. Geol. Soc. London, XXXIX, 



p. 33, pi. iv, 2. 

 1897. Helicopora ulrichi. Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, fig. 70, 2, 2« (p. 518). 

 Hamilton: Falls of the Ohio. 



HELIOTRYPA Ulrich. Genotype: Heliotrypa bifolia Ulrich, 



1883. Heliotrypa. Ulrich, Jour. Cincinnati Soc. Nat. Hist., VI, p. 277, 



1889. Heliotrypa. Miller, North American Geol. Pal., p. 308. 



1890. Hehotrypa. Ulrich, Geol. Surv. Illinois, VIII, p. 404. 



