324 Ki:COKl) OF science for 1887 and 1888. 



248. Ulrich,E. O. On Sccptropora, a uevv geuus of Bryozoa, with reniarkH on Reloporn, 



Hall, and other genera of that type. Ainer. Geol.,vol. i, pp. ti'2ii--SM. April, 

 1888. Minneapolis. 



249. Letter: Reply to Mr. .1. F. James about noniemlature of some Cii'cinnati 



group fossils. Aiuer. Gool., vol. i, pp. 3;'I3-I?:}"). May, 1888. Minneapolis. 



250. VoDGKS, Anthony W. The genera and species <)f North American Carbonifer- 



ous Triiobites. Aunals N. Y. Acad. Sci., vol. IV, ])p. G9-10.5, pi. ii,iii. 1888. 



New York. 

 2r)l. Description of two new si)ecic8 of Carboniferous Trilobites. Trans. N.Y. 



Acad. Sci., vol. vil, i)p. 247-250. June, 1888. New York. 

 252. Wachsmuth, Ch., and .Springetj, F. Revision of the Pakeocrinoidea. Pt. iii. 



Proc. Acad. Nat. Sci. Philad., pp. 64-227. (March 30, 188(5.) 1887. Phija- 



dolphia. 

 253. The summit plates in Blastoids, Crinoids, and Cystids, and their 



morphological relations. Proc. Acad. Nat. Sci. Philad., pt. i, pp. 82-114. 



March, 1887. Philadelphia. 

 254. Discovery of the ventral structure of 7'it.rocriiiiis, and thecouse((uent 



modifications in the classification of the Criuoidea. Proc. Acad. Nat. Sci. 



Philad , pp. 337-363, pi. xviii. 1888. Philadelphia. 

 255. Crolalocr'ntKft, its structure and zoological ])<>sition. Proc. Acad. 



Nat. Sci. Philad., pp. 364-390, pi. xviii. 1888. PhiLidelphia,. 

 25(5. Wai.cott, C. D. Notice of second contribution to the studies of the Cambrian 



faunas of North America. Amer. Jouru. Sci,, vol. xxxiii, p. 150. February, 



1887. New Haven. 



257. Note on "The Tacouic System." An)er. Journ. Sci., vol. xxxiii, pp. 1.52, 



153. February, 1887. Ncav Haven. 



258. Cambrian age of the roofing slates of Granville, Washington County, 



Now York. Proc. A. A. A. S., vol. xxxv, pp. 220,221. 1887. Salem, Massachu- 

 setts. 



259. Note on the genus Archa'ocyathus of l>illings. Amer. Journ. Sci., V(d. 



xxxiv, pp. 145, 146. August, 1887. New Haven. 



2(i0. Fauna of the " Upper Taconic" of Emmons, i]i Washington County, New 



York, Amer. Jouru. Sci., xxxiv, pp. 187-199. September, 1887. New Haven. 

 261. Section of Lower Silurian (Ordovician) and Cambrian strata in central 



Now York, as shown by a deep well near Utica. (Abstract.) Proc. A. A. A. 



S., vol. xxxvi, pp. 211,212. December, 1887. Salem, Massachusetts. 

 262. Discovery of fossils in the Lower Taconic of Emmons. (Abstract.) Proc. 



A. A. A. S., vol. XXXVI, pp. 212,213. December, 1887. Salem, Massachusetts. 



263. The Tacouic System of Emmons, and the use of the name Tacouic iu geo- 

 logic nomenclature. Amer. Journ. Sci., vol. XXXVI. pp. 229-242, 307-327, 394- 

 401, and map. March, 1888. New Haven. 



264. Cambrian fossils from Mount Stephens, northwest territory of Canada. 



Amer. Journ. Sci., vol. xxxvi, pp. 161-166. September, 1888. New Haven. 



265. The stratigraphical succession of the Cambrian faunas of North America. 



Nature, vol. xxxviii, p. 551 1888. Loudon and New York. 



266. Ward, Lkstkr F. Types of the Laramie flora. Bull. 37, U. S. Geo). Survey. 



8vo. 344 pp., incl. 57 double-page idates. 1887. Washington. 



267. On th(! organization of the fossil plants of the Coal Measures. Part xiv. 



The true fructification of the Calmites, by W. C. Williamson. (Mrielly re- 

 viewed by L. F. W.) Amer. Jouru. Sci., vol. XXXVI, pp. 71, 72. 1888. New 

 Haven. 



268. A review of "Einleituug In die Pabi'0])liytologie voni botanischeu Standi 



pnnkt aus. Bearbeitet von II. Grafen zu Solms-Laubach." Auier. Journ. Sci., 

 vol. x.xxN'i, p. 72. 1888, New Haven. 



?69t • Evideuco of the fossil plants as to the ago of the Potomac Formation, 



AniHr, Jouru, Sci,, vol, XXXVI, pp. UU-lSl, August, 1^68, New Haveu, 



