part -4] CAMBRIAN 1I011IZ0XS OF COMLEYT. 385 



Salopiella obliqua, gen. et sp. nov., X 4, see p. 363; horizon Ac 5 . 



Fig. 18. Type- specimen [242] : a, internal cast or exterior (?), X 4 ; 

 b, enlargement of surface, X 10 ; c, section, X 10. 



Hyolithellus micans Billings, X 4, see p. 361 ; horizons Ac L to Ba §1 . 



Fig. 19. A curved example [252], Ad. 



20. A sinuous example [251], Ad. 



21. A straight example [1778], Ad. 



Hyolithellus micans, var. robustus nov., X 4, see p. 362 ; horizons Ba L to Bbj- 

 Fig. 22. A long fragment, with section [1695], Bb 1. 



Hyolithellus micans, var pallidus nov., X 4, see p. 362 ; horizons Ab., & Ah,. 

 Fig. 23. A fragment [1261]. 



Hyolitliellus (?) sinuosus, sp. nov., X 10, see p. 362 ; horizon A,. 

 Fig. 24. Type-specimen [1912]. 



Hyolithus scutytilis, sp. nov., X 4, see p. 356 ; horizon Ac-,. 



Fig. 25. Type-specimen [2587], with section. 



26. Fragment of shell [2585]. 



27. Character of sculpture [2583], x 6. 



Hyolithus ci-assus, sp. nov., X 2, see p. 354 ; horizon Ac-. 

 Fig. 28. Type-specimen, dorsal face, lateral view and section [2603]. 



Hyolithus sp. indet., operculum, X 4, see p. 356; horizon Ac,. 

 Fig. 29. Complete specimen, with section [2655]. 



Hyolithus strettonensis, sp. nov., X 2, see p. 355 ; horizon Ab,. 



Fig. 30. Type-specimen, internal cast, lateral view with section [1903]. 

 31. Dorsal face, external cast [1902]. 



Hyolithus strettonensis, var. brevis nov., X 4, see p. 355 ; horizon Ab,. 

 Fig. 32. Dorsal face [220]. 



Salterella (?) bella, sp. nov., X 10, see p. 360 ; horizon Ac 5 . 

 Fig. 33. Type-specimen, lateral view [523]. 



Hyolithus (Orthotheca) sp. indet., operculum, X 4, p. 358; horizon Ac ; . 

 Fig. 34. Exterior [2655]. 



Hyolithus (Orthotheca ?) sp. indet., operculum, X 4, see p. 358 ; horizon Acs. 

 Fig. 35. Internal cast, with section [2656]. 



Scenella elevata, sp. nov., X 6, see p. 364 ; horizon Ac.,. 

 Fig. 36. Type and only specimen, summit and lateral views [RE 1211]. 



Helcionella cingulata, sp. nov., X 4, p. 364 ; horizon Ac-,. 

 Fig. 37. Type-specimen, incomplete, lateral view and section [S27], Ac,. 

 Helcionella oblonya, sp. nov., X 2, see p. 365; horizon Ba r 



Fig. 38. Type-specimen, lateral and summit views [1316]. 

 39. Sculpture, X 5 [1314]. 



