324 Ri:COR]) OF science for 1887 and 1888. 



248. Ulricii,E. O. On Scepiropo)-a, a uew genus of Bryozoa, with remarks on Helopora, 



Hall, and other genera of that type. Anier. Geol., vol. i, i)[). i!28-<^34. April, 

 1888. Minneapolis. 



249. Letter: Reply to Mr. J, F. James about nomenelature of some Cincinnati 



group fossils. Amer. Geol., vol. I, pp. 333-3;5'>. May, 1888. Minneapolis. 



2,'JO. VODGKs, Anthony W. The genera and species of Nortli American Carbonifer- 

 ous Trilobites. Annals N. Y. Acad. Sci., vol. iv, ])p. 69-105, pi. ii, iir. 1888. 

 New York. 



2.^)1. Description of two uew species of Carboniferous Trilobites. Trans. N.Y. 



Acad. Sci., vol. vii, pp. 247-250. June, 1888. New York. 



252. Wachsmuth, Ch., and Springkr, F. Revision of the Paheocriuoidea. Pt. iii. 

 Proc. Acad. Nat. Sci. Philad., pp. 64-227. (March 30, 1886.) 1887, Phila- 

 delphia. 



2.53. The summit i)iates 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 Tcuocriniis, and the consequent 



moditicatioua in the classitication of the Crinoidea. Proc. Acad. Nat. Sci. 

 Philad , pp. 337-363, ].l. xviii. 1888. Philadelphia. 



2.55. Crotalocrinufi, Uh structure and zoological position. Proc. Acad. 



Nat. Sci. Philad., pp. 364-390, pi. xviil. 1888. Phihidelphia. 



256. Walcott, C. D. Notice of second contribution to the studies of the Cambrian 



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

 1887. New Haven. 



257. Note on "The Tacouic System." Amer. Journ. Sci., vol. xxxiif, pp. 152, 



153. February, 1887. New Haven. 



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



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

 setts. 



259. Note on the genus Arclia'ocyathus of Billings. Amer. Journ. Sci., vol. 



xxxiv, i)p. 145, 146. August, 1887. New Haven. 



260. — Fauna of the " Upper Taconic" of Emmons, in Washington County, New 



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



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



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

 S., vol. XXXVI, pp. 211,212. December, 18a7. 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 Taconic in 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, noi'thwest territory of Canada. 



Amer. Journ. Sci., vol. xxxvi, pp. 161-166. September, lSd8. New Haven. 



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



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



266. Ward, Lestur F. Types of the Laramie dora. Bull. 87, U. S. Geol. Survey. 



8vo. 344 pp., iucl. 57 double-page plates. 1887. Washington. 



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



The true fructitication of the Calmites, by W. C. Williamson. (Briefly re- 

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

 Haven. 



268. A review of "Einlcitung in die Pabeophytologie voni botanischen Stand- 



punkt aus. Bearbeitet von II. Grafen zu Solms-Lauhach." Amer. Journ. Sci., 

 vol. xxxvi, p. 72. 1888. New Haven. 



269. Evidence of the fossil plants as to the age of the Potomac Fornuition. 



Amer. Jouru. Sci., vol. xxxvi, pp. 119-131, ^ugust, 1888, New Haven. 



i 



