Dr. H. Woodward — Trilohites from Shantung, N. China. 213 



contemporaneous and nearly corresponding to the horizon of the 

 Scandinavian Andrarum Limestone, and to the lowest division of the 

 Potsdam Sandstone in America. 



The fauna of Wu-lo-pu, on the other hand, is characterized by the 

 new genus Dorypyge, in addition to which there are only found the 

 genera Liostracus (1 sp.) and Anomocare (1 sp.) ; no other species, 

 however, is in common with the before-mentioned faunas.' With 

 the genus Dorypyge Dames associates Dicellocephalus gothicus and 

 D. quadriceps, from the ' Quebec group' of Utah, and concludes 

 therefrom that the strata of Wu-lo-pu are of Lower Silurian age. 



At a later date Gottsche^ found Sinic strata, extending over 

 25 kilom., in Corea, near the frontier towards Liautung ; above 

 [p. 105] massive siliceous sandstones there follow fossiliferous marly 

 slates and bituminous limestones, underlying massive and in part 

 globulitio limestones, devoid of fossils. According to preliminary 

 information, the fauna consists chiefly of Trilobites of the genera 

 Agnostus, Dorypyge, ? Bemopleurides, ConocepTialus, CrepicepJialus, 

 and Anomocare ; two species (Dorypyge Bichthofeni and Anomocare ' 

 planum) occur also in the fauna of the Wu-lo-pu, and one {Anomocare i 

 maj'iis) in that of Sai-ma-ki. Accordingly, Gottsche places the marly \ 

 slates and bituminous limestones upon the same horizon as the 

 Andrarum Limestone, whilst he regards the globulitic limestones, ' 

 devoid of fossils, as probably of Lower Silurian age ; he therefore 

 arrives at almost the opposite conclusion to Dames, who unites the 

 Dorypyge strata of Wu-lo-pu with the Lower Silurian, and the 

 globulitic limestones of Ta-ling, as well as the strata of Sai-ma-ki, 

 with the Andrarum Limestone. 



Walcott,^ who places Dicellocephalus gothicus and D. quadriceps in 

 the genus Olenoides (Middle Cambrian), and considers Dorypyge to 

 be synonymous with Olenoides, regards the whole of the ' fauna of 

 Liautung' as Middle Cambrian, and views the Sinic strata as 

 h development of the Cambrian, entirely corresponding to that of his 

 iHocky Mountain province' of Western America. This view is shared 

 /on the whole by Trech * ; he, however, retains Dorypyge as distinct 

 /from the Lowe^ and Middle Cambrian genus Olenoides, though 

 admitting their near relationship ; he also quite correctly separates 

 the various faunas of Liautung. The Dorypyge strata of Wu-lo-pu 

 are held to be older than the Middle Cambrian limestones of Sai-ma-ki 

 and Ta-ling. Walcott,^ having in the meantime made known a true 

 Dorypyge from the Lower Cambrian of America, Trech points out 

 ■that the Dorypyge strata of Wu-lo-pu may be even of Lower 



1 Dorypyge Richthofeni is given on p. 27 as occurring also at Ta-ling ; this in 

 opposition to the remarks contained on p. 31 ; however, on some specimens in the 

 collection of the ' Museum fiir JS'atmrkunde,' this locality has been altered by Dames 

 himself into ' Wu-lo-pu.' ^ 



"^ " Geologische Skizze von Korea": Sitz.-Ber. d. Ak. d. "Wiss. z. Berlin, l/'^''^ 

 Jg. 1886, p. 857. 

 "< 3 Correlation papers, Cambrian: Bull. U.S. Geol. Sui'v., No. 81, 1891, p. 377. 

 A 1 Leth. geogn., vol. ii, pt. 1, 1897, p. 58. 

 = 10th Ann. Eep. U.S. Geol. Surv., p. 644: 



