Mr. H. G. Seeley on the Tibia of Megalornis. 153 



10. " Notes ou a Railway Section of the Lower Lias and nineties 

 between Stratford-on-Avon and Fenny Compton, and on the occur- 

 rence of the Rhsetics near Kineton and the Insect-beds near Knowle 

 in Warwickshire, and on the recent discovery of the Rha?tics near 

 Leicester." By the Rev. P. B. Brodie, M.A., F.G.S. 



This paper consists of a detailed description of the strata exposed 

 at a little distance from the railway- station at Stratford-on-Avon 

 and at Kineton, and of the evidence of the existence of the Insect- 

 beds near Knowle in Warwickshire. The author also records the 

 discovery of the Rhaeties near Leicester by Mr. Harrison. The 

 following is the section at the brick-pit at the base of the Spinne}' 

 Hills, in ascending order — twenty feet of red and blue marls, twenty 

 feet of hard fissured sandy marl containing fish-scales, and fifteen 

 feet of black and light-coloured shales full of fossils. The beds 

 appear to dip to the S.E. 



11. " The Resemblances of Ichthyosaurian Bones to the bones of 

 other Animals." By Harry Govier Seeley, Esq., F.L.S., F.G.S. 



Hitherto in comparative anatomy the term affinity has been 

 vaguely used in treating of the extinct groups. In this paper the 

 author endeavoured to give precision to the term Ichthyosaurian by 

 analyzing the characters of the Ichthyosaurian skeleton into the 

 resemblances which it presents to the skeletons of other vertebrates. 

 Ichthyosaurian characters are subdivided into Mammalian, Avian, 

 Crocodilian, Chelonian, Lacertilian, Chamaeleonian, Rhynchocepha- 

 lian, Ophidian, Urodelan, Piscine, Plesiosaurian, Dinosaurian, Dicy- 

 nodont, and Labyrinthodont. By thus classifying the characters it 

 is anticipated that the affinities of the Ichthyosaurian type may be 

 rendered evident. 



12. " The Resemblances of Plesiosaurian Bones to the Bones of 

 other Animals." By Harry Govier Seeley, Esq., E.L.S., E.G.S. 



This paper is an attempt to make a similar analysis of the Plesio- 

 saurian skeleton. 



13. " On the Tibia of Megalornis, a large Struthious Bird from 

 the London Clay." By Harry Govier Seeley, Esq., F.L.S., F.G.S. 



The author described the distal portion of a right tibia of a large 

 struthious bird from the London Clay of Eastchurch in Sheppey. 

 The only living types approximating to it are the Apteryx, which 

 similarly has the shaft at the back of the distal articulation, and the 

 Emu, which similarly has the shaft compressed from back to front. 

 The author considered that the skull named by Prof. Owen Dasornis 

 might, if it belonged to a bird, be referred to Megalornis ; but he 

 detailed considerations which led him to suggest that Dasornis may 

 possibly be a fish. 



14. " On Cervical and Dorsal Vertebra} of Crocotlihiscantabrigiensis 

 (Seeley), from the Cambridge L T pper Greensand," By Harry Govier 

 Seeley, Esq., F.L.S., F.G.S. 



The author described in detail a cervical and a dorsal vertebra of 

 a proccelous Crocodile from the Cambridge Upper Greensand, whicli 



