100 RESEARCH IN CHINA. 



and Locality. Middle Cambrian : ((' 1 and (' 2) Lower shale member 

 of the Kiu-lung group [Blackwelder, 19070, pp. 37 and 40 (part of the third list 

 of fossils), and fig. 10 (beds 4 and 5), p. 38], 2 miles (3.2 km.) south of Yen-chuang, 

 vSin-t'ai district, Shan-tung, and (C57) in limestone nodules in the lower shale mem- 

 ber of the Kiu-lung group [idem (first list of fossils)], and 3 miles (4.8 km.) south of 

 Kao-kia-p'u, and 4 miles (6.4 km.) north of Sin-t'ai-hien, Sin-t'ai district, Shan-tung; 

 also (C71), massive cliff-making limestone in the central portion of the Ki-chou 

 formation [Willis and Blackwelder, 1907, pp. 139 and 145 (second list of fossils)], 4 

 miles (6.4 km.) southwest of Tung-yii, Shan-si, China. 



Collected by Bailey Willis and Eliot Blackwelder. 



The specimens described by Doctor Dames occur in a dense gray limestone, 

 Province of Liau-tung, southeast of Mukden, Sai-ma-ki, Manchuria, China. 



Specimens have also been collected by J. P. Iddings and Li San from the fol- 

 lowing localities: (35n and 35 r) Fu-chou series; limestones near the base of the 

 series just above the white quartzite, and (30 c) shales interbedded with limestones 

 near the base of the series just above the white quartzite [see Blackwelder, 1907^, 

 p. 92, for general section giving stratigraphic relations], all three collected in a low 

 bluff on the shore of Tschang-hsing-tau Island, east of Niang-niang-kung, Liau-tung; 

 also (35 iO, shales about 80 feet (24. m) above the white quartzite, and (3(5 hj shales 

 about 130 feet (40 m.) above the white quartzite [see idem], collected in a low bluff 

 on the shore of Tschang-hsing-tau Island, east of Niang-niang-kung, Liau-tung, and 

 (35o and 36g) shales about 130 feet (40 m.) above the white quartzite [see idem], 

 collected in drainage cuts a short distance back from the bluff (see 35 n) forming the 

 shore of Tschang-hsing-tau Island, east of Niang-niang-kung, Liau-tung, Manchuria, 

 China. 



Agnostus douvillei Bergeron. 

 Plate 7, Figures 3, sa-b, 8, 8<z; Plate 1 1, Figures 6, 7. 



Agnostus douvillei BERGERON, 1889, Bull. Soc. Geol., France, 3d ser., vol. xxvn, p. 43, plate 12, fig. 3. 



(Species described and illustrated.) 

 Agnostus koerferiMonKE, 1903, Jahrb. Konigl. Preuss. Geol. Land, und Bergakad., vol. xxm, Hafti, 



p. iii, plate 3, figs. 1-9. (Described and discussed as a new species.) 



Doctor Monke illustrates this species very fully. A comparison of the photo- 

 graphs of the slabs of limestone on which A. kocrjeri Monke and ,4. douvillei Ber- 

 geron occur indicates that the two are identical, although A. douvillei is represented 

 by a broken cephalon. A second cephalon occurs on the slab illustrated by J. 

 Bergeron that is clearly the form described as A. koerferi by Monke. 



Doctor Monke's specimens are on slabs of limestone found at Yen-tsy-yai, 

 province of Shan-tung, China. He refers the associated fauna to the Upper Cam- 

 brian, but the detailed work of Eliot Blackwelder [19070, p. 41] shows it to belong 

 to the Middle Cambrian, just below the Ch'au-mi-tien limestone. 



In Manchuria Dr. J. P. Iddings found this species both in argillaceous shale 

 and on the surface of thin layers of limestone of the Drepanura premesnili fauna. 



Formation and Locality. Middle Cambrian: (Ofi) Thin platy limestone in 

 the upper shale member of the Kiu-lung group [Blackwelder, 19070, pp. 37 and 41 

 (second list of fossils), and fig. 10 (bed 12 ), p. 38], 2.5 miles (4 km.) southwest of 

 Yen-chuang, Sin-t'ai district, Shan-tung, and (C55) just below the Ch'au-mi-tien 

 limestone in the Ku-shan shales [idem, p. 43], in isolated hills at an elevation of 380 

 feet (114 m). above the Won-ho, 12 miles (igkm.) south 80 east of Tsi-nan, Shan- 

 tung, China. 



Collected by Bailey Willis and Eliot Blackwelder. 



