DESCRIPTION OF PLATE 15—Continued. 
Lisania cf. bura (Walcott) (p. 166). 
14. Dorsal view and side outline of central parts of cephalon, X 4. From Locality C77, Middle Cam- 
brian, Ki-chéu formation, southeast of Yau-t’o near Wu-t’ai-hién, Shan-si. U.S. Nat. Mus., 
Cat. No. 58046. 
Lisania bura (Walcott) (p. 166). 
15. Dorsal view and side outline of type specimen, showing central parts of cephalon, X 5. From 
Locality C22, Middle Cambrian, Ch’ang-hia limestone, Ch’ang-hia, Shan-tung. U.S. Nat. 
Mus., Cat. No. 57605. 
Lisania ? belenus (Walcott) (p. 166). 
16. Dorsal and side views of type specimen, showing central parts of cephalon, X 4. From Locality 
C19, Middle Cambrian, Ch’ang-hia limestone, Ch’ang-hia, Shan-tung. U.S. Nat. Mus., 
Cat. No. 58047. 
Lisania agonius (Walcott) (p. 164). 
17. Dorsal and side views of central parts of cephalon, X 4. From Locality C1, Middle Cambrian, 
Kiu-lung group, south of Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 58048. 
17a. Free cheek, X 3. From Locality C2 (same as C1 but a little above it in the section). U.S. Nat. 
Mus., Cat. No. 58049. 
Lisania ajax (Walcott) (p. 165). 
18. Dorsal and side views of type specimen, showing central parts of cephalon, X 4. From Locality 
C12, Middle Cambrian, Kiu-lung group, southwest of Yen-chuang, Shan-tung. U.S. Nat. 
Mus., Cat. No. 58050. 
18a. Free cheek, X 4. From Locality C40, about the same horizonand locality (C12) asabove. U.S. 
Nat. Mus., Cat. No. 58051. 
Lisania alala (Walcott) (p. 165). 
19. Fragment of central parts of cephalon, and side outline, X 4. U.S. Nat. Mus., Cat. No. 58052. (C 51.) 
19a. Fragment of central parts of cephalon, differing somewhat from specimen represented by fig. 19, 
x 4. From Locality C4, Middle Cambrian, Kiu-lung group, southwest of Yen-chuang, Shan- 
tung. U.S. Nat. Mus., Cat. No. 58055. 
19). Free cheek referred to this species, X 3. (C51.) U.S. Nat. Mus., Cat. No. 58053. 
19¢ (X 4, C51) and 19d (X 4). Top and side views of pygidia referred to this species. From Locality 
C22, Middle Cambrian, Ch’ang-hia limestone, Ch’ang-hia, Shan-tung. U.S. Nat. Mus., Cat. 
Nos. 58054 and 58056. 
The specimens represented by figs. 19, 19b, and 19¢ are from Locality €51, Middle Cambrian, 
Ch’ang-hia formation, Ch’au-mi-tién, Shan-tung. 
Lisania sp. undt. (a) Walcott (p. 167). 
20. Dorsal and side views of pygidium from Locality C30, Middle Cambrian, Ch’ang-hia limestone, 
Ch’ang-hia, Shan-tung. U.S. Nat. Mus., Cat. No. 58060. 
Lisania sp. undt. (b) Walcott (p. 167). 
21. Dorsal and side views of a pygidium from Locality C41, Middle Cambrian, Ch’au-mi-tién lime- 
stone, near Ch’au-mi-tién, Shan-tung. U.S. Nat. Mus., Cat. No. 58061. 
te 
on 
es 
