LIST OF PUBLICATIONS. 



165 



Walcott, Charles D. — Continued. 



British Columbia during the 

 field seasons of 1909 and 1910. 

 together with a discussion of 

 some new features in the ap- 

 pendages of the Trilobita. The 

 mode of occurrence of the fos- 

 sils is discussed, giving a sec- 

 tion of the beds included in the 

 Burgess shale, and the paper 

 includes a report by B. S. Lar- 

 sen, jr., on the chemical compo- 

 sition and microscopic structure 

 of the shale. 



Cainbro - Ordovician boundary 



in British Columbia with descrip- 

 tion of fossils. 



Smithsonian Misc. 

 Colls., 57, No. 7, 

 Mar. 8, 1912, pp. 

 229-237, pi. 35. 

 This paper treats of the dis- 

 covery by Mr. J. A. Allan and 

 Mr. L. D. Burling of fossils 

 which place the Cambro-Ordo- 

 vician boundary above a series 

 of 4,000 feet of shales and lime- 

 stones measured by the former 

 in the Ice River region of Brit- 

 ish Columbia. It is accom- 

 panied by one plate illustrating 

 the 4 species of Ordovician 

 brachiopods and trilobites which 

 they collected. 



Walcott, Charles D. The Sardinian 

 Cambrian genus Olenopsis in America. 



Stnithsoninn Misc. 

 Colls., 57, No. 8, 

 Mar. 8, 1912, pp. 

 239-249, pi. 36. 

 The trilobite genus Olenopsis 

 has been identified from beds 

 of uncertain stratigraphic posi- 

 tion on the island of Sardinia, 

 but has never before been rec- 

 ognized in America. This pa- 

 per describes 3 new species 

 from British Columbia, Mon- 

 tana, and Pennsylvania, in hori- 

 zons near the top of the Lower 

 Cambrian or in the passage beds 

 to the Middle Cambrian. 



White, David. The characters of the 



fossil plant Gigantopteris Schenk 



and its occurrence in North America. 



Proc. U. S. Nat. Mus., 



41, No. 1873, Feb. 8, 



1912, pp. 493-516, 



pis. 43-49. 



Description of a remarkable 

 type of Pteridosperm hitherto 

 known only from China. The- 

 characters of the genus are dis- 

 cussed, and the new species 

 Oigantopteris americana is de- 

 scribed. 



MISCELLANEOUS. 



Dall, William Healey. The subant- 

 arctic islands of New Zealand. 



Science (n. s.), 34, No. 

 866, Aug. 4, 1911, 

 pp. 157, 158. 

 Review of the reports on 

 these islands made by the scien- 

 tific societies of New Zealand. 



Dall, William Healey. Due d'Or- 

 leans. Campagne arctique de 1907. 

 Par Charles Bulens. Bruxelles. 

 1910-11. 



Science (n. s.), 34, No. 

 885, Dec. 15, 1911, 

 pp. 849, 850. 

 Review of report on the arc- 

 tic explorations of the Duke of 

 Orleans. 



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