Dr R. H. Traquair on Fossil Fishes from Oil Shales. 113 



Locality — Barff, near Keswick. From the Shiddaw slates. 



This species is named after Professor H. A. Nicholson, 

 who was the first to make known the rich Graptolite fauna of 

 the rocks of the Lake District. 



Sp. 3. Nematolites Hichsi, Plate II., fig. 3. — It is possible 

 that the Nematolites from the Arenig rocks of St David's, and 

 identified by Mr Hopkinson and myself with the Nemagraptus 

 capillaris of Emmons, may prove to be distinct. Should this 

 eventually be found to be the case, it may be designated 

 Nematolites Hicksi, after its discoverer, who was the first to 

 attempt the subdivision of the Arenig rocks of South Wales. 



The highly flexuous character of its main branches forms 

 its chief peculiarity. The form of the meshes is as yet 

 unknown. 



Locality— lldinVixn Quarry, near St David's. From the 

 Upper Arenig rocks. 



Explanation of Plate. 



Fig. 1. Nemagraptus elegaiis^ Emm.; after Emmons : "American Geology," 

 Plate i., fig. 6. 



Fig. 2. Nemagraptus capillaris, Emm. ; ibid. , Plate i. , fig. 7. 

 Fig. 3. Nematolites Hicksi {s^. nov.)(?); Llanvirn, St David's. 

 Figs. 4, 5. Nematolites Grayi (sp. nov. ) ; Shalloch Mill, Girvan. 

 Fig. 6. Nematolites Nicholsoni {s^. nov.); Barff, Keswick. 



XYI. Fossil Fishes from the Edinhicrghshire and Linlithgow- 

 shire Oil Shales. By E. H. Traquair, Esq., M.D., 

 F.G.S., Keeper of the Natural History Collections in 

 the Museum of Science and Art, Edinburgh. 



(Ptead 18th December 1878.) 



The strata from which the fish remains to be described or 

 noticed in the present communication were obtained, are the 

 bituminous shales now extensively wrought for the manu- 

 facture of paraf&n oil at West Calder, and Oakbank, near 

 Midcalder, in Edinburghshire, and at Broxburn, in Linlith- 

 gowshire. These shales are already well known for the fossil 



VOL. V. H 



