146 AMERICAN FOSSIL BRYOZOA. [bull. 173. 



*Ulrich, E. O. Contributions to the micro-paleontology of the 



Cambro-Silurian rocks of Canada. Part II. Geol. Nat. Hist. 



Sur. Canada, Montreal, 1889, pp. 27-57, pis. viii, ix.) 



The paper contains an account with descriptions of the bryozoa collected from 



Stony Mountain, Manitoba. One new genus is created, Goniotrypa, and a number 



of new species. 



1890. 



* 



Nickles, J. M. Studies on Monticulipora. (American Geologist, 



VI, 1890, pp. 396-399.) 

 A rejoinder to Rominger's Studies on Monticulipora, American Geologist, VI, 1890, 

 pp. 102-121. 



* Rominger, Carl. Studies on Monticulipora. (American Geologist, 



VI, 1890, pp. 102-121.) 

 A paper general and critical in nature, and taking strong ground against modern 

 methods of determination. 



* Ulrich, E. O. New Silurian Bryozoa. (Jour. Cincinnati Soc. Nat. 



Hist., XII, 1890, pp. 173-198*^ 22 tigs, in text.) 

 Describes the new genera, Vinella and Diastoporina, and new species bolonging to 

 the genera Vinella, Stomatopora, Mitoclema, Diastoporina, Phylloporina, Rhini- 

 dictya, Pachydictya, Stictoporella, Arthrostylus, Helopora, Arthroclema, Nematopora. 

 These afterwards appeared in the Geology of Minnesota, III, 1893. 



* Ulrich, E. O. Paleozoic Bryozoa. (Geological Survey of Illinois, 



VIII, 1890, pp. 285-688, pis. xxix-lxxviii.) 

 The publication of this most important memoir marks an epoch in the study of the 

 Paleozoic Bryozoa. Based upon an elaborate series of investigations embracing a very 

 large number of Paleozoic species and a vast amount of material, a classification is 

 proposed laid down along lines which are not likely soon to be disturbed. The 

 "Introduction and terminology" is followed by chapters on the "General and com- 

 parative structure of Paleozoic Bryozoa" and the "Classification and interrelations of 

 families and genera." The definitions of suborders, families, and genera are carefully 

 drawn, some 310 species, many of them new, described and figured. This work is 

 indispensable to the student of Paleozoic Bryozoa. 



1891. 



* Hall, James. Continuation of descriptions of Bryozoa not printed in 



Volume VI, Paleontology of New York, for the Report of the 

 State Geologist, 1890. (Tenth Annual Report of the State Geol- 

 ogist of New York for the Year 1890, Albany, 1891, pp. 37-57. 

 Also in Forty-fourth Annual Report of the New York State 



Museum, 1891, pp. 67-87.) 

 Contains descriptions of Hamilton group bryozoa, for which there was not room m 

 Paleontology of New York, VI. There are described: Paleschara, five species; Sticto- 

 pora, nineteen species; Semiopora, one species; Prismopora, two species; Ptilodictya, 

 two species; Thamniscus, one species; Hederella, one species; Ptilopora, two species. 

 There are no illustrations. 



