Prof. Owen — On a New Sauroid Fish. 55 



they would be better classed with the latter than the former. 

 As previously stated, I went to find a Lower Eed Sandstone of 

 Permian age, and was disappointed in meeting with what I, with all 

 my bias, am convinced is Millstone-grit or " Eough Eock," The 

 sections, on examination by any geologist, will speak for themselves 

 much better than any description by me. I give my humble opinion, 

 and the grounds on which I form it, with the greatest possible 

 respect to the worthy Professors, and trust that the Geological 

 Survey, when the gentlemen connected with it survey and map the 

 district, will decide whether I am right or wrong in my conclusions. 

 In my examination of the district I had the advantage of being 

 accompanied by my friend, Mr. J. W. Kirkby, of Sunderland, a 

 gentleman well known for his thorough knowledge of the Permian 

 beds of the north-east of England ; and I have his consent to state 

 that he entirely coincides with me in my opinion of the age of the 

 Bramham Moor, Plumpton, Knaresborough, and Fountains Abbey 

 Sandstones. 



II. — On a Genus and Species of Saukoid Fish {Thlattodus 



SUCHO'iDES ,^ Ow.) FROM THE KiMMERIDGE ClAY OF iSToKFOLK. 



By Prof. Owen, F.R.S., F.G.S., etc. 



(PLATE III.) 



BUT little evidence has, hitherto, been had of the existence of 

 large Sauroid fishes in the Kimmeridge Clay : indications by 

 detached teeth had only, until now, reached me. The very useful 

 " Systematic and Stratigraphical Catalogue of the Fossil Fish in the 

 cabinets of Lord Cole" (now Earl of Enniskillen) "and Sir Philip de 

 M. Grey Egerton," 4to., did not include any species from that forma- 

 tion at the time of its publication (1837). 



To-C. B. EosE, Esq., F.G.S., we are indebted for the evidence of 

 the fine addition to the Sauroid family of Ganoid fishes figured in 

 in Plate IH. 



The portion of skull, including the main part of the upper and 

 lower jaws, with their dentition, in that gentleman's instructive col- 

 lection at Yarmouth, was obtained from the Kimmeridge Clay at 

 Downham, near King's Lynn, Norfolk.^ 



The portion of upper jaw (Plate III.), nearly 7 inches in length, 

 contains twelve teeth, or their recesses of attachment : of which six 

 are in the maxillary (^') and as many in the premaxillary (2'). The 

 teeth are strong cones, with a sharp apex and large subquadrate base, 

 narrower in the fore-and-aft direction of the jaw : less convex trans- 

 versely on the outer than on the inner side of the crown : straight or 

 slightly convex, lengthwise, on the outer side ; concave, lengthwise, 

 on the inner side, the crown being slightly bent inwards as it 

 descends vertically from the alveolar part of the upper jaw. The 

 most conspicuous characteristic of the teeth in both jaws is the 



^ dXa'u, to bruise; oBovs, tooth; ffvxos, name of an Egyptian Crocodile. 

 2 See " Geological Map of Norfolk," in the " Outline of the Geology of Norfolk," 

 by Samuel Woodward, 8vo. Norwich, 1833. 



