DESORIPTIOI^ OF PLATES. 



Plate I. 

 (Mount Stephen Fauna). 



Fig. 1. — Urothcca flagellum, n. gen. et sp.— a, complete example— 6, a larger tube, 

 apex broken. Both nat. size.— c, a portion magnified to show the transverse 

 growth lines. Mag. f . See p. 40. 



Fig. 2. — Byronia annulata, n. gen. et sp. — a, complete tube. Nat. size. — b, portion 

 magnified to show the sculpture, Mag. \. See p. 4:2. 



Fig. 3.—Orthotheca corrugafa, n. sp. Tube, ventral side, apex broken. Mag. ^. 

 See p. 42. 



Fig. 4. — Hyolithes, sp. Tube, ventral side chambered at the apex. Mag. f. See p. 

 43. 



Fig. 5. — Hyolithes carinatus, n. sp.— a, tube, ventral side. — 56, operculum mould of 

 the interior. Both mag. r. See p. 42. 



Fig. 6. — Aqnostus montis, n. sp. Complete example. Mag. J. See p. 43. 



Fig. 7. — Ptychoparia cordillera', Roem. — a, head and seven segments, cheeks some- 

 what displaced. Mag. f . — b, pygidium. Mag. f. See p. 44. 



Plate II. 

 (Mount Stephen Fauna). 



Fig. 1. — Neolenus granulata, n. gen. and sp. — a, complete example half grown. — b, 



head-shield, middle piece, full size.— c, hypostome found with this species. 



All nat. size. See p. 55. 

 Fig. 2.—Dnlicfiometopus occidentalis, n. sp. Young, complete test. Mag. ^. See p. 



49. 

 Fig. 3.— Corynexochus Roemingeri, Matt.— a, middle piece of the head. Mag. {. — 



b, same in profile. See p. 47. 

 Fig. i.—Conocephalites, cf. perseus, Hall. Middle piece of the head-shield, (the left 



anterior corner is restored). Mag. f. See p. 46. 

 Fig. ô.—Bathyurisctcs pupa, n. sp. Complete, except the movable cheeks. Mag. f. 



See p. 51. 



Plate III. 

 (Nos. 1 and 2 Mount Stephen, Nos. 3 to 6 Newfoundland Cambrian). 



Fig. l.—Dorypyge Daivsoni, Wale. Complete (except the genal spines). Nat. size. 



See p. 56. 

 Fig. 2.—Oryctocephalus Walker i, n. sp. Restored, middle piece from an individual: 



14 mm. long ; thorax and movable cheeks from one 10 mm. long ; pygidium. 



from one 4i mm. long. The body, etc. Mag. J. See p. 60- 

 Fig. S.—OboleUa atlantica. Wale. Ventral valve. Young. Mag. \^. See p. 76. 

 Fig. 'i.—Baphisfoma (?) KeUiensis, n. sp.— re, viewed from above.— 6, from the side. 



Nat. size. See p. 76. 



121 



