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. 



130. Associated free cheek, X 4. U. S. Nat. Mus.. Cat. No. 57860. 

 136. Associated fragment of what may be a median thoracic 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. Natural size. From Locality C 6, 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 C 16, Lower 

 Cambrian, Man-t'o shale, south of Ch'ang-hia, Shan-tung. t". S. Nat. Mus., Cat. No. 57863. 



Redlichia sp. undt. (r) Walcott (p. 106). 



1 6. Free cheek from same stratigraphic horizon as free cheeks represented by figs. I2a 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. 

 i6a. Associated fragment of thoracic segment. Natural size. U. S. Nat. Mus., Cat. No. 57865. 



Stephanocare richthofeni Monke (p. 114). 



17. A cranidium. [After Monke, 1903. plate vn, fig. 3.] 



170, 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. 170, X 4. U. S. Nat. Mus., Cat. No. 57867. 

 i7<~. Pygidium with unusually long spine on the border. U. S. Nat. Mus., Cat. No. 57868. 

 l^d. Under side of pygidium, X 4. U. S. Nat. Mus., Cat. No. 57869. 



The specimens represented by figs. i?r and i7<2are from Locality C55, Middle Cambrian, Kiu-lung 

 group, southeast of Tsi-nan, Shan-tung. 



\ie. Typical form of pygidium and side outline, X 2. U. S. Nat. Mus., Cat. No. 57870. 

 I7/. Profile view of a thoracic segment, X 3. U. S. Nat. Mus., Cat. No. 57871. 



All of the specimens illustrated are from Locality Cfi, except those represented by figs. i~ic and \id, 

 Middle Cambrian, Kiu-lung group, southwest of Yen-chuang, Shan-tung. 



242 



