CEPHALOPODA. 129 



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



0. caei'eesiense, 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. comu-vaccinum, F. McCoy, A. M. N. H. ser. 2, Xll (1853), 

 p. 196, and Contrib. Brit. Pal. (18.54), p. 265, and Brit. Palajoz. 

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

 Limestone; Lovnck. 



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

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

 Bal-a ; 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- 

 feroiLs 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. primaevum (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 : Gefn-ddxt. 



0. iPoteiioceras) pyriforme, v. Gomphocera.s neglectum. 



w. c. 9 



