DESCRIPTION OF PLATE 7—Continued. 
Redlichia ? finalis Walcott (p. 105). 
13. Central parts of a cranidium with strong occipital spine, and side outline, X 6. U.S. Nat. Mus., 
Cat. No. 57859. 
13a. Associated free cheek, X 4. U.S. Nat. Mus., Cat. No. 57860. 
136. Associated fragment of what may be a median thoracie spine, X 2. U.S. Nat. Mus., Cat. No. 
57861. 
The three specimens illustrated occur at Locality C58, Middle Cambrian, Ch’ang-hia limestone, south- 
east of Kao-kia-p’u, Shan-tung. 
Redlichia ? sp. undt. (a) Walcott (p. 105). 
14. Fragment of a free cheek, showing genal angle and spine. Naturalsize. From Locality C6, Middle 
Cambrian, Kiu-lung group, southwest of Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 
57862. 
Redlichia sp. undt. (b) Walcott (p. 106). 
15. Fragment of free cheek with a genal spine; also with a long sharp spine directed obliquely inward 
and backward, apparently at posterior margin of eye-lobe, X 2. From Locality C16, Lower 
Cambrian, Man-t’o shale, south of Ch’ang-hia, Shan-tung. U.S. Nat. Mus., Cat. No. 57863. 
Redlichia sp. undt. (c) Walcott (p. 106). 
16. Free cheek from same stratigraphic horizon as free cheeks represented by figs. 12a and 15, 
Natural size. From Locality C27, Lower Cambrian, Man-t’o shale at Ch’ang-hia, Shan-tung. 
U. S. Nat. Mus., Cat. No. 57864. 
16a. Associated fragment of thoracic segment. Natural size. U.S. Nat. Mus., Cat. No. 57865. 
Stephanocare richthofeni Monke (p. 114). 
17. Acranidium. [After Monke, 1903, plate vn, fig. 3.] 
17a. A cranidium showing a slightly different posterior margin as compared with fig.17, X 4. U.S. Nat. 
Mus., Cat. No. 57866. 
17). Free cheek associated with fig. 17a, X 4. U.S. Nat. Mus., Cat. No. 57867. 
17¢. Pygidium with unusually long spine on the border. U.S. Nat. Mus., Cat. No. 57868. 
17d. Under side of pygidium, X 4. U.S. Nat. Mus., Cat. No. 57869. 
The specimens represented by figs. 17¢ and 17d are from Locality C55, Middle Cambrian, Kiu-lung 
group, southeast of Tsi-nan, Shan-tung. 
17e. Typical form of pygidium and side outline, X 2. U.S. Nat. Mus., Cat. No. 57870. 
17f. Profile view of a thoracic segment, X 3. U.S. Nat. Mus., Cat. No. 57871. 
All of the specimens illustrated are from Locality C6, except those represented by figs. 17¢ and 17d, 
Middle Cambrian, Kiu-lung group, southwest of Yen-chuang, Shan-tung. 
