A MIDDLE CAMBRIAN FAUNA PEOM BENNETT ISLAND 23 



Fig. 26. Agnostus arcticus n. sp. Cephalon, fairly complete. After cast of imprint. Cat. 



No. 2073/164. 

 Fig. 27 — 30. Agnostus arcticus n. sp. Fragments of pygidia. — Fig. 27, 28. Cat. No. 314/1118. — 



Fig. 29, 30. Cat. No. 314/1114. 

 Fig. 31. Agnostus arcticus n. sp. Cephalon of young specimen, with hesitation referred to this 



species. Cat. No. 2073/128. 

 Fig. 32. Agnostus sp. No. 2. Cephalon of young specimen. Cat. No. 314/1115. 

 Fig. 33, 34. Agnostus sp. No. 2. Incomplete cephala, tentatively referred to this species. Cat. 



No. 314/1119. 

 Fig. 35. Agnostus repandus n. sp. Cephalon, with genal spines visible. Cat. No, 2073/127. 

 Fig. 36. Agnostus repandus n. sp. Cephalon. Cat. No. 314/1116. 



Fig. 37. Agnostus repandus n. sp. Cephalon of immature specimen, with the basal lobes still unde- 

 veloped. Cat. No. 3141/114. 

 Fig. 38. Agnostus repandus n. sp. Pygidium. Cat. No. 314/1118. 

 Fig. 39. Agnostus repandus n. sp. Imprint of pygidium. Cat. No. 2073/128. 

 Fig. 40—43. Agnostus repandus n. sp. Cephala, probably belonging to this species. — Fig. 40. Cat. 



No. 2073/152. — Fig. 41. Cat. No. 2073/123. — Fig. 42. Cat. No. 2073/163. — Fig, 43. Cat. 



No. 2073/164. * 



Fig. 44 a, b. ^^wos^MS sp. No. 3. Cephalon (?), dorsal view and longitudinal section. Preserved 



in limestone. Cat. No. 314/1105. 

 Fig. 45. Agnostus sp. No. 4. Cephalon (?) of immature specimen. Cat. No. 314/1118. 

 Fig. 46, 47. Agnostus sp. No. 5. Pygidia. Cat. No. 314/1119. 



Fig. 48. Agnostus (repandus n. sp.?). Pygidium of immature specimen. Cat. No. 314/1114. 

 Fig. 49. Agnostus (?) sp. indet Pygidium (?) of immature specimen. Cat. No. 314/1114. 



PLATE II 



Fig. 1. Anomocare excavatum (Angelin). Cranidium. Cat. No. 314/1116. 



Fig. 2. Anomocare excavatum (Angelin). Cranidium, After cast of imprint. Cat, No, 314/1109. 



Fig. 3, 4. Anomocare excavatum (Angelin), Cranidia of young specimens. After casts of imprints. 



Cat. No. 314/1108. 

 Fig. 5. Anomocare excavatum (Angelin). Free cheek. Cat. No. 314/1109. 

 Fig, 6. Anomocare excavatum (Angelin). Free cheek, anteriorly showing the doublure. Cat. 



No. 2073/161. 

 Fig. 7. Anomocare excavatum (Angelin), Pygidium. Cat. No. 314/1111. 

 Fig. 8, 9. Anomocare excavatum (Angelin). Pygidia. After casts of imprints. Cat. Nos. 314/1103 



and 314/1108 resp. 

 Fig. 10, 11. Anomocare excavatum (Angelin). Pygidia of young specimens. Cat. Nos. 314/1116 



and 314/1108 resp. 

 Fig. 12, 13. Anomocare excavatum (Angelin). Incomplete thoracic segments. Cat. Nos. 314/1120 



and 314/1107 resp. 

 Fig. 14. Anomocare excavatum (Angelin). Hypostoma, seen from outside, associated with this 



species. After cast of imprint. Cat. No. 314/1111. 

 Fig. 15. Anomocare sibericum n. sp. Fairly complete specimen. In part after cast. Cat. 



No. 314/1106. 

 Fig. 16. Anomocare sibericum n. sp. Part of cephalon. Cat. No. 314/1115. 



Fig. 17. Anomocare sibericum n. sp. Pygidium, internal cast, showing doublure. Cat. No. 314/1115. 

 Fig. 18. Anomocare sibericum n. sp. Pygidium. Cat. No. 314/1119. 

 Fig. 19, 20. Anomocare sibericum n. sp. Incomplete hypostomata, seen from outside, associated with 



this species. Cat. Nos. 314/1119 and 314/1106 resp. 



