138 AMERICAN FOSSIL BRYOZOA. [bull. 173. 



White, C. A. Paleontological Papers No. 11: Remarks upon certain 

 Car])oniferous fossils from Colorado, Arizona, Idaho, Utah, 

 Wyoming, and certain Cretaceous corals from Colorado, together 

 with descriptions of new forms. (Bulletin U. S. Geological 

 Survey, V, 1879, pp. 209-221.) 

 This paper contains a description of Ptikxiictya triangulata White. 



1880. 



* 



Hall, James. Corals and Bryozoans of the Lower Helderberg group. 

 (Thirty-second Ann. Rep. New York State Museum Nat Hist., 

 Albany, 1879, pp. 141-176, pis. vii-xxii.) 

 This work is a continuation of the work on the bryozoan fauna of the Lower Hel- 

 derberg group pubhshed in 1874. Seventy-four species are described and figured, 

 most of them new, referred to the genera Chaetetes, Trematopora, Callopora, Lichen- 

 aha, Ceramopora, Paleschara, Stictopora, Escharopora, Fenestella, Ichthyorachis, 

 and Thamniscus. 



Miller, S. A. Description of four new species of Silurian fossils. 

 (Jour. Cincinnati Soc. Nat. Hist., Ill, 1880, pp. 140-144, pi. iv.) 

 Describes Bythopora nashvillensis n. sp. 



Ulrich, E. O. Catalogue of fossils occurring in the Cincinnati group 

 of Ohio, Indiana, and Kentucky. Cincinnati, 1880. iv, 31 pp. 



Whitfield, R. P. Descriptions of new species of fossils from the 

 Paleozoic formations of Wisconsin. (Ann. Rep. Wisconsin Geo- 

 logical Survey for 1879,1880, pp. 45-71.) 

 Contains description of one new species of bryozoa, Fistuhpora rugosa. 



1881. 



Claypole, E. W. On the occurrence of an archimediform Fenestellid 

 in the Upper Silurian rocks of Ohio. (Proceedings of the Ameri- 

 can Association for the Advancement of Science, XXX, 1881, 

 p. 191.) 

 The author notes the occurrence of this remarkable form for which he proposes 



the new genus and species Helicopora latispiralis. 



*HaU, James. Bryozoans of the Upper Helderberg and Hamilton 



groups. (Trans. Albany Institute, X, 1883, pp. 145-197.) Dis- 



triljuted in the form of extracts separately paged in 1881. 



This paper contains brief, usually inadequate descriptions, without illustrations, of 



189 new species from the Upper Helderberg of New York and Ontario, and from the 



Falls of the Ohio, which deposit Hall considered of Upper Helderberg age, and from 



the Hamilton group of New York, Ontario, and elsewhere. Most of these species 



were later more fully described and figured in the Paleontology of New York, VI, 



1887. The new genera and subgenera proposed are Phractopora, Thallostigma, 



Intrapora, Thaumopora, Prismopora, Scalaripora, Cystopora, Clonopora, Pteropora, 



Semiopora, Acrogenia, Hederella, Ptilionella, and Hernodia. 



Miller, S. A. Subcarboniferous fossils from the Lake Valley mining 

 district of New Mexico, with descriptions of new species. (Jour. 

 Cincinnati Soc. Nat. Hist., IV, 1881, pp. 306-315, pi. vii.) 

 Describes Trematopora americana n. sj). 



