

158 SILURIAN. 
pean Reference to McCor's Names and References; Observations, &c. 
Drawers. Synopsis: and Figures of Genera. 
Gd7 p. 311. Bellerophon Wenlockensis, Sow. (Siluria, 2nd 
Gdé6 ed. pl. 25, fig. 7). 
Nautili, or Cuttle-fish with 
shells. CEPHALOPODA. 
Gdas p- 313. Orthoceras angulatum, Wahl. (Hisinger, Leth. 
Suec. t. 10, fig. 1, Siluria, 2nd ed. pl. 28, fig. 4). 
p. 314. Orthoceras dimidiatum, Sow. (Siluria, 2nd ed. 
pl. 28, fig. 5). 
Ge Orthoceras annulatum, Sow. (Siluria, 2nd ed. 
FC pl. 26, fig. 1). 
Gb 
Gd8 
FC Orthoceras, var. fimbriatum, Sow. (Siluria, 2nd 
Gd10 ed. pl. 26, fig. 2). 
Gd10 Orthoceras Brightii, Sow. (Ormoceras, Siluria, 
2nd ed. pl. 27, figs. 5, 6), is interior of 
O. fimbriatum. 
Gd10 O. (Actinoceras), p. 815. Orthoceras Mocktreense, Sow. (Sil. 2nd ed. pl. 
29, fig. 2). The siphon of this is bead-like. 
p. 315. Orthoceras Ludense, Sow. (Siluria, 2nd ed. pl. 
28, figs. 1, 2, Foss. 61, fig. 2). 
FC Orthoceras canaliculatum, Sow. (Siluria, 2nd 
ed. pl. 28, fig. 3). 
Gb p. 317. Orthoceras subundulatum, Portl. (Geol. Rep. 
Lond. t. 28, fig. 2, Siluria, 2nd ed. Foss. 61, 
fig. 3). 
Gd8s p. 317. Orthoceras tenuicinctum, Portl. (Geol. Rep. 
p. 871, t. 27, fig. 5; Siluria, 2nd ed. p. 219, 
Foss. 40, fig. 3, Creseis Sedgwickt, Forbes). 
Orthoceras? perelegans, Salter (Siluria, 2nd ed. 
pl. 29, fig. 6), very common. 
Gd8 Cycloceras, p. 319. Orthoceras Ibex, Sow. (Siluria, 2nd ed. pl. 29, 






figs. 3, 4). 
Numbers and Localities. 


a. 627, Woolhope; b. 823, 
Dudley, F.C. 
b. 824, Builth Bridge (? the 
true species). 
b. 826, a. 620, a. 621, Dud- 
ley, F.C. ; b. 828, Dermydd 
Fawr, Craig Bronbanog, 
Denbighshire; b. 827, Led- 
bury. 
a. 618, a. 646, very coarse 
ridges, Dudley, F. C. 
a. 640, Ledbury. 
a. 639 (beaded siphon), 
Ledbury. 
a. 615, Dudley. 
b. 832 (Wenlock Shale), 
Wenlock. 
b. 825, Dinas Bran, Llan- 
gollen. 
b. 831, Dinas Bran, Llan- 
gollen. 
