1 68 RESEARCH IN CHINA. 



A cephalon referred to this species occurs at Ch'au-mi-tien at a lower horizon 

 in the Ch'ang-hia limestone, and appears to be identical with the type specimen, 

 except that the granulation of the surface is finer and the granules are more 

 scattered. 



Formation and Locality. Middle Cambrian: (C25) Limestone about 50 feet 

 (15 m.) below the Ku-shan shale in the uppermost beds of the Ch'ang-hia formation 

 [Blackwelder, 19070, p. 33 (part of the last list of fossils)], at Ch'ang-hia, Shan-tung; 

 also (C51), lower part of gray crystalline limestone in the upper portion of the oolitic 

 part of the Ch'ang-hia limestone [idem (part of the first list of fossils]), at Ch'au-mi- 

 tien, Shan-tung, China. 



Collected by Eliot Blackwelder. 



Also from Locality 35 r, Fu-chou series; limestones near the base of the series 

 just above the white quartzite [see Blackwelder, 19076, p. 92, for general section 

 giving 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. 



Solenopleura beroe Walcott. 



Plate 17, Figures 14, 140, 17. 



Solenopleura beroe WALCOTT, 1905, Proc. U.S. Nat. Mus., vol. xxix, p. 91. (Species characterized 

 as below.) 



The description of the general form of the cephalon of 5. agno [p. 167] applies 

 very closely to this species. It differs from the latter in its broader fixed cheeks, 

 shorter frontal limb, more clearly marked glabellar furrows, and minutely pustulose 

 surface. The type and only specimen of the cephalon in the collection has a length 

 of 4 mm. A number of specimens of the cephalon of this species were collected by 

 Dr. J. P. Iddings in Manchuria in association with the Dorypyge richthofeni fauna. 



Formation and Locality. Upper Cambrian: (C64) Upper limestone member 

 of the Kiu-lung group [Blackwelder, 19070, pp. 37 and 42 (first list of fossils), and 

 fig. 10 (bed 20), p. 38], 2.7 miles (4.3 km.) southwest of Yen-chuang, Sin-t'ai district, 

 Shan-tung, China. 



Collected by Eliot Blackwelder. 



Also from Locality Son, Middle Cambrian: Fu-chou series; limestones near the 

 base of the series just above the white quartzite [see Blackwelder, 19076, p. 92, for 

 general section giving 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. 



Solenopleura chalcon Walcott. 



Plate 17, Figure 13. 



Solenopleura chalcon WALCOTT, 1911, Smithsonian Misc. Coll., vol. 57, No. 4, p. 83, plate 16, fig. 5, 

 (Described and discussed as a new species essentially as below.) 



Only one specimen of the cranidium of this species is known. In form it is 

 nearest to Solenopleura beroe Walcott [plate 17, fig. 14]. It differs in having a 

 proportionately narrower glabella ; more convex free cheeks ; more rounded frontal 

 rim, and in the presence of a depression dividing the frontal limb on the median 

 line of the glabella. Its tuberculated surface is much like that of 5. beroe. 



Formation and Locality. Middle Cambrian: (35 r) Fu-chou series, limestones 

 near the base just above the white quartzite [see Blackwelder, 19076, p. 92, for 

 general section giving 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. 



