GEOLOGICAL REFORM 95 



against accepting mathematical deductions unless the 

 premises were absolutely matters of fact : — 



" Mathematics may be compared to a mill of exquisite work- 

 manship, which grinds you stuff of any degree of fineness ; but, 

 nevertheless, what you get out depends upon what you put in ; 

 and as the grandest mill in the world will not extract wheat- 

 flour from peas-cods, so pages of formulae will not get a definite 

 result out of loose data." 



The chief interest of the address lies in the recognition 

 of the fact that the progress of scientific thought 

 necessitated some modification of the Uniformitarian 

 attitude, and the adoption of " Evolutionism " instead. 



2. "On Hyperodapedon" (op. cit., xxv, 1869, pp. 

 138-52. Read January 13, 1869. Sci. Mem., iii, xx, 

 p. 374). — This extinct reptile is shown to resemble the 

 existing Hatteria of New Zealand, the only living repre- 

 sentative of its order. 



3. "On a new Labyrinthodont from Bradford" (op. 

 cit., xxv, 1869, pp. 309-11. Read May 26, 1869. 

 Sci. Mem., iii, xxi, p. 391). — This describes Pholi- 

 derpeton, an extinct Amphibian. 



4. " On the Upper Jaw of Megalosaurus " (op. cit., xxv, 



1869, pp. 311-14. Read May 26, 1869. Sci. Mem., iii, 

 xxii, p. 394). — 1 he huge extinct reptile in question is a 

 carnivorous member of the extinct group of Dinosauria. 



5. " On Hypsilophodon Foxii, a New Dinosaurian 

 from the Wealden of the Isle of Wight " (op. cit., xxvi, 



1870, pp. 3-12. Read November 10, 1869. Sci. Mem., 

 iii, xxvii, p. 454). 



6. " Further Evidence of the Affinity between the 

 Dinosaurian Reptiles and Birds" (op. cit., xxvi, 1870, 

 pp. 12-31. Read November 10, 1869. Sci. Mem., iii, 

 xxviii, p. 465). — In this memoir views previously ad- 

 vanced {cf, p. 89) are elaborated. 



