80 
LIST OF TYPES AND FIGURED 
Nautilus (Hercoglossa) saxbyi, J. Morris : A. H. Foord, v. Nau- 
tilus saxbii, J. Morris. 
Nomismoceras ornatum, A. H. Foord & G. C. Crick, Cat. Foss. 
Ceph., British Museum, pt. iii, 1897, p. 219, ff. 104 a, 6, c. Car- 
boniferous : Halifax, Yorkshire. [C. 5279.] 
Nomismoceras rotiforme (J. Phillips) : A. H. Foord & G. C. Crick, 
Cat. Foss. Ceph., British Museum, pt. iii, 1897, p. 216, f. 103 
(suture-line). Carboniferous Limestone ; Bolland, Yorkshire. 
[C. 273 c.] 
Nomismoceras spirorbis (J. Phillips) : A. H. Foord & G. C. Crick, 
Cat. Foss. Ceph., British Museum, pt. iii, 1897, p. 212, ff. 102 
b, c. Carboniferous Limestone : Bolland, Yorkshire. [C. 273 6.] 
Olcostephanus (Polyp tychites) beani, A. Pavlow, BuU. Soe. Imp. 
Nat. Moscou, 1891, no. 4 (1892), p. 481, pi. xv (viii), ff. 7 a, h, 
Speeton Clay (Portlandian ; ? upper part of Aquilonian) : Speeton, 
Yorkshire. [37640.] . 
Olcostephanus (Simbirskites) concinnus (J. Phillips) : A. Pavlow, 
Bull. Soc. Imp. Nat. Moscou, 1891, no. 4 (1892), p. 501, pi. xviii 
(xi), f. 16. Speeton Clay (Neocomian, Cg) ; Speeton, Yorkshire. 
[C. 4651.] 
Ophidioceras articulatum (J. de C. Sowerby) : J. F. Blake, Brit. 
Foss. Ceph. pt. i, 1882, p. 230, pi. xviii, f. 15. Lower Ludlow : 
Ludlow, Shropshire. [37899.] 
Ophidioceras geometricum^ J. F. Blake, Brit. Foss. Ceph. pt. i, 
1882, p. 231, pi. xviii, ff. 16, 16a. Lower Ludlow: Dudley, 
Worcestershire (“ Ludlow ” — BlaJce). [73896.] 
Ormoceras backii, C. Stokes, v. Orthocera sp*, J. J. Bigsby. 
Ormoceras bayfieldi, C. Stokes, Trans. Geol. Soc. [2], vol. v, 1840, 
p. 709, pi. lx, f. 1. Silurian (Niagara Group) : jDrummond Island, 
Lake Huron. [33416.] 
Ormoceras whitei, C. Stokes, v. Orthocera sp., J. J. Bigsby. 
Orthocera annulata, J. Sowerby, Min. Conch, vol. ii, p. 73, 1816, 
pL cxxxiii. Silurian: Coalbrookdale, Shropshire. [43839.] 
