DESCRIPTION OF PLATE 14. 
Lonchocephalus tellus (Walcott) (p. 143). 
1. Dorsal view of type specimen of species, X 2. From Locality C2, Middle Cambrian, Kiu-lung 
formation, south of Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 57997. 
Liostracina krausei Monke [see plate 11, fig. 8] (p. 143). 
2 and 2a. Central parts of the cephalon of two specimens showing variation in detail of glabella and 
fixed cheeks. From Locality C6, Middle Cambrian, Kiu-lung formation, southwest of Yen- 
chuang, Shan-tung. U.S. Nat. Mus., Cat. Nos. 57998 and 57999. 
Proampyx burea (Walcott) (p. 145). 
3. Dorsal and side views of type specimen. From Locality C61, Upper Cambrian, Ch’au-mi-tién 
formation, southwest of Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 58001. 
Pterocephalus busiris Walcott (p. 146). 
4. Top and side views of type specimen of pygidium. From Locality C61, Upper Cambrian, Kiu-lung 
group, southwest of Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 58002. 
Pterocephalus asiaticus Walcott (p. 146). 
5. Fragment of central parts of cephalon. U.S. Nat. Mus., Cat. No. 58004. 
5a. Fragment of pygidium. U.S. Nat. Mus., Cat. No. 58005. 
55. Fragment of spinose border of pygidium. U.S. Nat. Mus., Cat. No. 58006. 
The three specimens illustrated are from Locality C12, Middle Cambrian, Kiu-lung formation, south- 
west of Yen-chuang, Shan-tung. 
Shantungia spinifera Walcott [see plate 11, figs. 9, 10] (p. 148). 
6. An elongate form of central portions of cephalon. U.S. Nat. Mus., Cat. No. 57807. 
6a. Associated free cheek. U.S. Nat. Mus., Cat. No. 57808. 
6b. A minute cephalon without the nasute projection in front. This may be a young cephalon of some 
other trilobite. U.S. Nat. Mus., Cat. No. 57809. 
6c. Associated free cheek. U.S. Nat. Mus., Cat. No. 57810. 
6d. A broad form of central parts of cephalon. U.S. Nat. Mus., Cat. No. 57811. 
6e. A small cranidium without the anterior nasute projection X 4. U.S. Nat. Mus., Cat. No. 57812. 
All of the specimens illustrated are from Locality C6, Middle Cambrian, Ku-shan formation, southwest 
of Yen-chuang, Shan-tung. 
Protaspis gen. and sp. undt. Walcott. 
7. Young trilobite (Protaspis stage) associated with Shantungia spinifera, Stephanocare richthofeni, and 
Agnostus koerfert. From Locality C6, Middle Cambrian, Ku-shan formation, southwest of 
Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 58013. 
Pterocephalus ? liches Walcott (p. 147). 
8. Dorsal and side view of type specimen of pygidium, X 4. From Locality 35n, Middle Cambrian, 
Fu-chéu series, Liau-tung, Manchuria. U.S. Nat. Mus., Cat. No. 57573. 
Inouyia titiana (Walcott) (p. 155). 
9. Dorsal and side views of type specimen of cranidium, X 2. From Locality C7, Middle Cambrian, 
Ch’ang-hia formation, southwest of Yen-chuang, Shan-tung. U.S. Nat. Mus., Cat. No. 58015. 
Inouyia ? inflata (Walcott) (p. 152). 
10. Dorsal and side views of cranidium, X 2. From Locality C69, Middle Cambrian, Ki-chéu lime- 
stone, east of Fang-lan-chén, Shan-si. U.S. Nat. Mus., Cat. No. 58016. 
Inouyia capax (Walcott) (p. 151). 
11 and 11a. Dorsal and side views of typical forms of cranidium, X 3. From Locality C70, Middle 
Cambrian, Ki-chou limestone, southwest of Tung-yii, Shan-si. U. S. Nat. Mus., Cat. 
Nos. 58017 and 58018. 
Inouyia melie (Walcott) (p. 153). 
12. Dorsal and side views of type specimen, showing central parts of cephalon, X 3. From Locality 
C70, Middle Cambrian, Ki-chéu limestone, south-southwest of Tung-yii, Shan-si. U.S. Nat. 
Mus., Cat. No. 57604. ; 
12a. Dorsal and side views of a specimen with proportionately larger frontal limb, X 4. From Locality 
C75, Middle Cambrian, Ki-ch6u formation, south of Wu-t’ai-hién, Shan-si. U.S. Nat. Mus., 
Cat. No. 58019. 
Inouyia divi (Walcott) (p. 152). 
13. Dorsal and side views of type specimen, showing central parts of cephalon, X 2. From Locality 
C5, Middle Cambrian, Kiu-lung formation, southwest of Yen-chuang, Shan-tung. U.S. 
Nat. Mus., Cat. No. 58020. 
13a. Free cheek associated with specimen represented by fig. 13, X 4. U.S. Nat. Mus., Cat No. 58021. 
14. Protaspis associated with this species, X 8. U.S. Nat. Mus., Cat. No. 58022. 
255 
