CEPHALOPODA. 129 



Orthoceras barrandei?, v. Cyrtoceras (Meloceras) barrandei. 



0. caweesiense, v. Orthoceras avelinei. 



Orthoceras canaliculatum, Sowerby. 0. angulatum, Wahlen- 



berg, J. F. Blake, Brit. Foss. Ceph. part i (1882), pi. vii, f. 4, 



9, p. 106. Wenlock Limestone ; Dudley. Fletcher Collection. 

 O. cornu-vaccinum, F. McCoy, A. M. N. H. ser. 2, xn (1853), 



p. 196, and Contrib. Brit. Pal. (1854), p. 265, and Brit. Palseoz. 



Foss. (1855), pi. iii H, f. 17, 17 a, b, p. 568. Carboniferous 



Limestone; Lowick. 

 O. dimidiatum, Sowerby, J. F. Blake, Brit. Foss. Ceph. part i 



(1882), pi. vi, f. 11, p. 103. F. McCoy, Brit. Palseoz. Foss. 



(1852), p. 314. 0. dimidiatum, var., Salter, Cat. (1873), p. 173. 



Lower Ludlow ; Leintwardine. 



O. elongatocinctum, Portlock, young specimen, J. F. Blake, 

 Brit. Foss. Ceph. part i (1882), pi. xiii, f. 8, 8 a, p. 119. Middle 

 Bala; Barking. 



O. (Cycloceras) flemingi, F. McCoy, A. M. N. H. ser. 2, xii 

 (1853), p. 196, and Contrib. Brit. Pal. (1854), p. 264, and Brit. 

 Palseoz. Foss. (1855), pi. iii H, f. 18, 18 a, b, p. 569. Carboni- 

 ferous Limestone; Lowick. 



O. fluctuatum, Salter, Cat. (1873), p. 37. 0. reticinctum ?, J. F. 

 Blake, Brit. Foss. Ceph. part i (1882), p. 122. Llandeilo Beds; 

 Wellfield, Builth. 



O. ibex, Sowerby, J. F. Blake, Brit. Foss. Ceph. part i (1882), 

 pi. v, f. 5, p. 95. Upper Ludlow ; Benson Knot. 



O. ludense, Sowerby, J. F. Blake, Brit. Foss. Ceph. part i (1882), 

 pi. x, f. 5, p. 156. Lower Ludlow; Leintwardine. The spe- 

 cimens do not agree well with the figure. 



O. politum, F. McCoy, A. M. N. H. ser. 2, vii (1851), p. 46, and 

 Contrib. Brit. Pal. (1854), p. 181, and Brit. Palseoz. Foss. (1852), 

 pi. i L, f. 30, 30 a, p. 316. J. F. Blake, Brit. Foss. Ceph. part i 

 (1882), pi. ix, f. 1, 2, 2 a, b, p. 141. Bala Series; Glenwhapple. 



O. primsevum (Forbes), J. F. Blake, Brit. Foss. Ceph. part i 

 (1882), p. 148. Creseis primceva, E. Forbes, Q. J. G. S. I (1845), 

 p. 146, woodcut 1. Denbighshire Flags ; Cefn-ddu. 



0. (Poterioceras} pyriforme, v. Gomphoceras neglectum. 



w. c. 9 



