116 RESEARCH IN CHINA. 
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; also (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 (114 m.) above the W6n-ho, 12 miles (19 km.) south 80° east of Tsi-nan, Shan- 
tung, China. 
Collected by Bailey Willis and Eliot Blackwelder. 
Stephanocare ? sinensis (Bergeron). 
Plate 8, Figures 4, 4a. 
Dicellocephalus ? sinensis BERGERON, 1899, Bull. Soc. Geol. de France, 3d ser., vol. xxvii, p. 508, 
text-fig. 7, vol. vit, fig. 7. (Describes and illustrates pygidium.) 
Damesella sinensis WALCOTT, 1905, Proc. U.S. Nat. Mus., vol. xxrx, p.35. (Places Dicellocephalus ? 
sinensis Bergeron as Damesella sinensis (Bergeron).) 
M. Bergeron founded this species on specimens of a pygidium that occur on the 
same surface of platy limestone as Stephanocare richthofeni in the collection made by 
Mr. Blackwelder. It is probable that the pygidia belong to the genus, but in the 
absence of the cephalon the generic reference is more or less doubtful. Collections 
that are now being made for me in the Sin-t’ai district may, when received, clear up 
not only this but several other doubtful generic references. In Manchuria it is 
associated with several of the species found with it about Yen-chuang. 
Doctor Monke has illustrated several pygidia [Monke, 1903, plate 4, figs. 12-17], 
and referred them to 7 einistion lansi Monke, that appear to belong to this species. 
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, Shantung, China. 
Collected by Eliot Blackwelder. 
Also from Locality 36f, Fu-chéu series; about 1,000 feet (305 m.) above the 
white quartzite [see Blackwelder, 1907), p. 92, for general stratigraphic relations]; 
collected in a low bluff on the shore of Tschang-hsing-tau Island, east of Niang- 
niang-kung, Liau-tung, Manchuria, China. 
Collected by J. P. Iddings and Li San. 
Stephanocare ? sp. undt. 
Plate 8, Figure 6. 
This is a small pygidium that differs from the pygidium of S. ? monkei Walcott 
[p. 113] in having marginal spines of a more nearly uniform character. 
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, Shantung, China. 
Collected by Eliot Blackwelder. 
‘Genus BLACKWELDERIA Walcott. 
Blackwelderia WALCcoTT, 1906, Proc. U. S. Nat. Mus., vol. xxx, p. 573. (Mentioned as a new genus.) 
Cephalon transversely semicircular, with the postero-lateral angles rounded or 
spiniferous; the anterior and lateral margins have a thickened or elevated border 
within which there is a concave slope or a narrow furrow. Glabella truncato- 
