CARBONIFEROUS CEPHALOPODA. 

 BY JAMES NEILSON. 



THE Carboniferous Cephalopoda are represented by a considerable number 

 of genera and species, which range from the Lower to the Upper Limestones, 

 the greater number both of species and of individuals being found in the 

 latter. A small species of Goniatites has been found abundantly in a thin 

 marine band in the LTpper Carboniferous series at Alexandra Parade, Glasgow, 

 Remains of large examples of Nautilus, Actinoceras, Orthoceras, and Poterio- 

 ceras occur in the limestone chiefly in the form of casts, but the good 

 specimens which are got in the shales generally have the outer shell well 

 preserved, some of the Orthoceratites still showing the remains of chevron- 

 shaped colour-bands. 



Actinoceras giganteum, Sow. U. L. S. Orchard ; Gare ; Castlecary. 

 L. L. S. Calderwood Cement-shale : Thornton. 



A. sp. (with siphuncle larger and more compressed vertically than the above 

 species). U. L. S. Thornliebank. 



Cyrtoceras Gesneri, Mart. (Very Rare). U. L. S. Gare ; Robroyston ; 

 Ardeii Limestone, Barrhead. L. L. S. Craigenglen. 



C. rugosum, Flem. (Rare). U. L. S. Orchard ; Thornliebank. L. L. S. 

 Calderwood Cement-shale, East Kilbride ; Hairmyres ; Craigenglen. 



C. unguis, Phill. (Common). U. L.S. Gare ; Thornliebank ; Orchard. 

 L. L. S. Calderwood Cement-shale, E. Kilbride : Thornton ; Craigen- 

 glen. 



Orthoceras attenuatum, Flem. (Common). U. L. S. Gare; Thornlie- 

 bank ; Orchard. L. L. S. Craigenglen ; Calderwood Cement-shale : 

 Thornton ; Carluke. 



0. cylindraceum, Flem. U. L. S. Gare : Robroyston : Thornliebank. 

 L. L. S. Carluke ; Thornton ; Craigenglen (with colour-bands). 



0. dentaloideum, Phill. (Very Rare). L. L. S. Shale over Hosie Lime- 

 stone, Campsie ; Calderwood Cement-shale, E. Kilbride. 



O.dilatatum, de Kon. U. L. S. Gare. L. L. S. Corrieburn. 



0. Goldfussianum, de Kon. U. L. S. Gare. L. L. S. Raes Gill, Carluke ; 

 South Hill, Campsie ; Thornton. 



0. laterale, Phill. U. L. S. Orchard. L. L. S. Craigenglen; Braidwood. 



0. laeve, Flem. L. L. S. Calderwood Cement-shales ; Boghead : Nevvfield ; 

 E. Kilbride. 



0. lineale, de Kon. L. L. S. Netlierfield, Strathavon ; Balgrochan Glen, 

 Campsie. 



0. ovale, Phill.- U. L. S. Orchard ; Gare. 



0. Munsterianum, de Kon. L. L. S. Shale above Hosie Limestone, Campsie. 



0. pygmaeum, de Kon. U. L. S. Shale above Hosie Limestone, Campsie, 

 and Thornton. 



