100 RESEARCH IN CHINA. 
Formation and Locality —Middle Cambrian: (Cl and C2) Lower shale member 
of the Kiu-lung group [Blackwelder, 1907a, pp. 37 and 4o (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, 
Sin-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-hién, Sin-t’ai district, Shan-tung ; 
also (C71), massive cliff-making limestone in the central portion of the Ki-chéu 
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: (85n and 85r) Fu-chdéu series; limestones near the base of the 
series just above the white quartzite, and (36e) 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 (35p), shales about 80 feet (24.m) above the white quartzite, and (36h) 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 
(850 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 35n) forming the 
shore of Tschang-hsing-tau Island, east of Niang-niang-kung, Liau-tung, Manchuria, 
China. 
Agnostus douvilléi Bergeron. 
Plate 7, Figures 3, 3a—, 8, 8a; Plate 11, Figures 6, 7. 
Agnostus douvillét BERGERON, 1889, Bull. Soc. Geol., France, 3d ser., vol. xxvul, p. 43, plate 12, fig. 3. 
(Species described and illustrated.) 
Agnostus koerferi MONKE, 1903, Jahrb. Konigl. Preuss. Geol. Land. und Bergakad., vol. xx, Haft 1, 
p. 111, 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. koerferi Monke and A. douvilléi Ber- 
geron occur indicates that the two are identical, although A. douvilléi 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 [1907a, p. 41] shows it to belong 
to the Middle Cambrian, just below the Ch’au-mi-tién 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: (C6) Thin platy limestone in 
the upper shale member of the Kiu-lung group [Blackwelder, 1907a, 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-tién 
limestone in the Ku-shan shales [idem, p. 43], in isolated hills at an elevation of 380 
feet (114m). above the Won-ho, 12 miles (19 km.) south 80° east of T’si-nan, Shan- 
tung, China. 
Collected by Bailey Willis and Eliot Blackwelder, 
