DESCRIPTION OF PLATE 14. 



Lonchocephalus tellus (Walcott) (p. 143). 



i. Dorsal view of type specimen of species, X 2. From Locality 02, Middle Cambrian, Kiu-lung 

 formation, south of Yen-chuang, Shan-tung. U. S. Nat. Mus., Cat. No. 57997. 



Liostracina krausei Monke [see plate n, fig. 8] (p. 143). 



2 and 2<z. Central parts of the cephalon of two specimens showing variation in detail of glabclla and 

 fixed cheeks. From Locality 06, Middle Cambrian. Kiu-lung formation, southwest of Yeu- 

 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-ticn 



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 061, 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. 

 50. Fragment of pygidium. V. S. Nat. Mus., Cat. No. 58005. 



5b. Fragment of spinose border of pygidium. U. S. Nat. Mus., Cat. No. 58006. 



The three specimens illustrated are from Locality 12, Middle Cambrian, Kiu-lung formation, south- 

 west of Yen-chuang, Shan-tung. 



Shantungia spinifera Walcott [see plate n, figs. 9, 10] (p. 148). 



6. An elongate form of central portions of cephalon. U. S. Nat. Mus., Cat. No. 57807. 

 da. 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 6, 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 richtkofeni, and 



Agnostus koerferi. From Locality 06, 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 35 n. Middle Cambrian, 



Fu-chou 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 07, Middle Cambrian, 



Ch'ang-hia formation, southwest of Yen-chuang, Shan-tung. U. S. Nat. Mus., Cat. No. 58015. 



Inouyia ? inflate (Walcott) (p. 152). 



10. Dorsal and side views of cranidium, X 2. From Locality 069, Middle Cambrian, Ki-ch6u lime- 



stone, east of Fang-lan-chon, Shan-si. U. S. Nat. Mus., Cat. No. 58016. 



Inouyia capax (Walcott) (p. 151). 



ii and iia. Dorsal and side views of typical forms of cranidium, X 3. From Locality 070, 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 



C 70, Middle Cambrian, Ki-chou limestone, south-southwest of Tung-yii, Shan-si. U. S. Nat. 

 Mus., Cat. No. 57604. 



120. Dorsal and side views of a specimen with proportionately larger frontal limb, X 4. From Locality 

 C75, Middle Cambrian, Ki-chou formation, south of Wu-t'ai-hin, 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 o r cephalon, X 2. From Locality 



05, Middle Cambrian, Kiu-lung formation, southwest of Yen-chuang, Shan-tung. U. S. 

 Nat. Mus., Cat. No. 58020. 

 130. 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 



