DESCRIPTION OF PLATE 15. 



Agraulos ceticephalus Barrande. 



1. Two dorsal shields on a fragment of shale from Skrey, Bohemia. U. S. Nat. Mus.,Cat. No. 18470. 

 ia and ib. Dorsal and side views of an entire dorsal shield. [After Barrande, Syst. Sil. de Boheme. 



vol. I, 1852, plate 10, figs. 14 and 15 ] 

 ic. Enlargement of two thoracic segments. (After Barrande, idem, fig. 16.] 



Agraulos nitida Walcott (p. 158). 



2. Dorsal and side views of type specimen, showing central parts of cephalon, X 3. U. S. Nat. Mus., 



Cat. No. 58031. 



2U and 2b. Fragments of cranidia, showing variations in outline of glabella and frontal limb, X 3. 

 U. S. Nat. Mus., Cat. Nos. 58032 and 58033. 



The three specimens illustrated aie from Locality 075, Middle Cambiian, Ki-ch6u formation, south 

 of Wu-t'ai-hien, Shan-si. 



Agraulos abrota Walcott (p. 156). 



3. Dorsal view and side outline of type specimen, showing central parts of cephalon, X 6. From 



Locality 023, Middle Cambrian, Ch'ang-hia formation, east-southeast of Ch'ang-hia, Shan- 

 tung. U. S. Nat. Mus., Cat. No. 58034. 



Agraulos obscura Walcott (p. 158). 



4. Dorsal and side views of type specimen, showing central parts of cephalon, X 2.5. From Locality 



069, Middle Cambrian, Ki-chou limestone, east of Fang-lan-chon, Shan-si. U. S. Nat. Mus!, 

 Cat. No. 58035. 



Agraulos dirce Walcott (p. 156). 



5. Dorsal and side views of type specimen, showing central parts of cephalon, X 1.5. From Locality 



052, Middle Cambrian, Ch'ang-hia formation, northeast of Sin-t'ai-hien, Shan-tung. V. S. 

 Nat. Mus., Cat. No. 58036. 



Agraulos dolon Walcott (p. 156). 



6. Dorsal and side views of type specimen, showing central parts of cephalon, X 2. From Locality 



C7, Middle Cambrian, Ch'ang-hia formation, southwest of Yen-chuang, Shan-tung. U. S. 

 Nat. Mus., Cat. No. 58037. 



Agraulos uta Walcott (p. 159). 



7. Dorsal and side views of type specimen, showing central parts of cephalon, X 3. From Locality 



075, Middle Cambrian, Ki-chou formation, south of Wu-t'ai-hien, Shan-si. U.S. Nat. Mus., 

 Cat. No. 58038. 



Agraulos vicina Walcott (p. 160). 



8. Dorsal and side views of type specimen, showing central parts of cephalon, X 4. From Locality 



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

 Mus., Cat. No. 58039. 



Agraulos sorge Walcott (p. 159)- 



9. Dorsal and side views of type specimen of cranidium, X 4. From Locality 35 n, Middle Cambrian, 



Fu-chou series, Liau-tung, Manchuria. U. S. Nat. Mus., Cat. No. 57575. 



Pagodia bia Walcott (p. 161). 



10. Dorsal and side views of type specimen, showing central parts of cephalon, X 3. From Locality 



C56, Upper Cambrian, Ch'au-mi-tien formation, Pagoda Hill, west-southwest of Tsi-nan, 

 Shan-tung. V. S. Nat. Mus., Cat. No. 58040. 

 loa. Associated pygidium referred to this species. U. S. Nat. Mus., Cat. No. 58041. 



Pagodia dolon Walcott (p. 161). 



11. Dorsal and side views of type specimen, showing central parts of cephalon, X 4. From Locality 



041, Middle Cambrian, Ch'au-mi-tien formation, southwest of Ch'au-mi-tien, Shan-tung. 

 U. S. Nat. Mus., Cat. No. 58042. 



Pagodia lotos Walcott (p. 162). 



12. The type specimen, showing central parts of cephalon, X 2. From Locality 056, Upper Cambrian, 



Ch'au-mi-tien formation. Pagoda Hill, west-southwest of Tsi-nan, Shan-tung. U. S. Nat. 

 Mus., Cat. No. 58043. 

 I2d. Associated pygidium referred to this species, X 4. U. S. Nat. Mus., Cat. No. 58044. 



Pagodia macedo Walcott (p. 163). 



13. Dorsal and side views of type specimen, showing central parts of cephalon, X 2. From Locality 



034, Upper Cambrian, Ch'au-mi-tien formation, Ch'au-mi-tien, Shan-tung. U.S. Nat. Mus., 

 Cat. No. 58045. 



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