Geology and Mineralogy. 405 



Dames, and Bergeron had described 21 species, which are now 

 increased by Walcott to ]72 forms, of which 118 are trilobites. 

 "The large fauna discovered in the reconnaissance made by 

 Messrs. Willis and Blackwelder is an indication of the richness 

 of the Cambrian faunas of eastern Asia, and of the great results 

 that may be expected when systematic, thorough exploration and 

 collecting are undertaken." 



Almost the entire Cambrian seems to be represented here, and 

 rests on the Tai Shan complex. The Lower Cambrian in the 

 Man To formation has 12 species, and as the trilobite Redlichia 

 is the diagnostic fossil, seemingly being a direct descendant of 

 Olenellus, we are led to infer that the lower portion of the. Lower 

 Cambrian, as known in America, may be absent in China. The 

 Middle Cambrian in the Chang Hsia formation is the richest in 

 fossils. Another and higher member of this division is the Ku 

 San shale, with a small fauna ; followed by the Upper Cambrian 

 in the Chao Mi Tien limestone, having another considerable 

 faunal development. 



" The fauna of the Ku San shale includes species of Damesella, 

 Dorypyge, and genera that are typical of the Middle Cambrian 

 fauna, while the fauna of the Chao Mi Tien limestone .... is 

 more nearly related to that of the Upper Cambrian of North 

 America and northwestern Europe." 



Walcott's lists clearly indicate that the Middle Cambrian of 

 China is directly connected with that of America, a fact long ago 

 noted by Dames, and recently more decidedly by Freeh. The 

 Upper Cambrian also has the American impress, while the Lower 

 Cambrian is Asiatic in character. 



The oldest known cephalopod is described here as Cyrtoceras 

 cambria. The structure, as described, is that of Cyrtoceras, but 

 one would rather have looked for Plloceras or Fndoceras-Yike 

 forms in the Cambrian. Brachiopods, gastropods, and especially 

 trilobites make up the faunas, while not a single bivalve is here 

 recorded. Of new genera — all trilobites — there are Dorypygella, 

 Damesetta, Anomocarella, Pagodia, and Shantungia. c. s. 



4. The Cambrian Fauna of India / by Charles D. Walcott. 

 Proc. Washington Acad. Sci., vii, 1905, pp. 251-256. — The 

 writer here reviews the small Cambrian fauna of India first 

 described by Waagen ; this has also been referred to the Silurian 

 and Carboniferous. Walcott concludes : " In the absence of any 

 fossils clearly indicating the Olenellus fauna I think it unwise at 

 present to assume any other age for the fossiliferous Cambrian 

 beds than Middle Cambrian." c. s. 



5. Catalogue of the Type Specimens of Fossil Invertebrates 

 in the Department of Geology, V. IS. National Museum ; by 

 Charles Schuchert, assisted by W: H. Dall, T. W. Stanton, 

 and R. S. Bassler. Bull. U. S. National Museum, No. 53, Part 

 I, 1905, pp. i-v, 1-704. — This is an alphabetic catalogue of the 

 type and illustrated fossil invertebrates in this museum, previous 

 to 1905. It records 11,490 specimens of 6,100 species. Within 



Am. Jour. Sci. — Fourth Series, Vol. XX, No. ] 9.— November, 1905. 

 28 



