PALEONTOLOGY & EVOLUTION 107 



of Coal" (Coll. Essays, viii, p. 137), was delivered at 

 the Philosophical Institute, Bradford, and much resembles 

 in character the one " On a Piece of Chalk," given two 

 years previously (cf. p. 87). 



The following are the scientific memoirs and more 

 technical addresses of 1870 ; — 



I. "Anniversary Address of the President" (Q. J. 

 Geol. Soc, xxvi, 1870, pp. xxix-lxiv. Delivered 

 February 18, 1870. Sci. Mem., iii, xxx, p. 510. Re- 

 printed under the title of " Paleontology and the Doctrine 

 of Evolution," in Coll. Essays, viii, p. 340). — The more 

 important of the deceased Fellows to whom tributes were 

 paid are the Vicomte d'Archiac, J. Beete Jukes, H. C. E. 

 von Meyer and J. W. Salter. The address may be 

 described as bringing a previous one up to date. In 

 memoirs already dealt with (if. pp. 89, 95) Huxley had 

 pointed to certain extinct reptiles (Ornithoscelida, a group 

 of Dinosauria) as being the animals most nearly inter- 

 mediate between reptiles and birds. Here he adds : — 



" . . . it is very doubtful whether any of the genera of Orni- 

 thoscelida with which we are at present acquainted, are the 

 actual linear types by which the transition from the lizard to 

 the bird was effected. These, very probably, are still hidden 

 from us in the older formations." 



This view has been amply endorsed by subsequent 

 research. We have also the famous account of the 

 pedigree of the horse, so far as then known. Existing 

 equine quadrupeds, with their one-toed extremities (pos- 

 sessing, however, in the " splint-bones," vestiges or 

 rudiments of two others), and complex grinding teeth, 

 are traced back to earlier three-toed forms (Hipparion, 

 Anchitherium, Plagiolophus), in which the teeth in 

 question are simpler in character. And in connection 



