SUMMARY AND CONCLUSION. 1 15 



fauna of that region was essentially the same as in Europe. According to the 

 discoveries of Mr. Joseph Mawson, 1 it includes such typical survivors of the 

 Jurassic fauna as Acrodus, Lepidotus, Megalurus, and probably Belonostomus, 

 besides a few more advanced forms, among Avhich a Chirocentrid (Ohiromystus 

 mawsoni) and a Clupeoid (Diplomysius longicostatns) are clearly recognisable. 

 The only unique fish found here is a gigantic Coelacanth, Mawsonla, as highly 

 specialised as the Upper Cretaceous Macropoma. The fish-remains hitherto 

 recorded from the supposed Neocomian of Mexico, 2 the United States, 3 and East 

 Africa 4 are also of an essentially Jurassic facies. It is therefore evident thai a 

 specially rapid evolution of sharks, skates, and teleosteans occurred in Middle 

 ( 'retareous times. 



In conclusion, the author desires to express his thanks to the many friends who 

 have facilitated this work. He is especially indebted to the Director of the 

 Geological Survey, Dr. F. L. Kitchin, and Mr. H. A. Allen ; to the President and 

 Committee of the Dorset Field Club, and Captain John E. Acland of the Dorset 

 County Museum; to the late and present Woodwardian Professors at Cambridge, 

 and Mr. Henry Woods of the Sedgwick Museum; to the Curators of the Museums 

 of Devizes, Hastings, Manchester, Sherborne School, Warwick, and York ; to the 

 late Mr. Charles Dawson ; and to Mr. Reginald W. Hooley. He also owes both 

 the drawings on the plates and the new text-figures to Miss Gertrude M. 

 Woodward. 



1 J. Mawson and A. S. Woodward, " On the Cretaceous Formation of Bahia (Brazil) and on 

 Vertebrate Fossils collected therein," Quart. Journ. Geol. Soc, vol. lxiii (1907), pp. 128 — 139, pis. vi— 

 viii. See also A. S. Woodward, Quart. Journ. Geol. Soc, vol. lxiv (1908), pp. 358 — 362, pis. xlii, 

 xliii ; and D. S. Jordan, Ann. Carnegie Mus. Pittsburgh, vol. vii (1910), pp. 23 — 34, pis. v — xiii. 



2 J. Felix, Palaeontograpkica, vol. xxxvii (1891), pp. 189 — 194, pis. xxviii — xxx. 



3 E. D. Cope, Journ. Acad. Nat. Sci. Philad., [2] vol. ix (1894), pp. 411— 447, pis. xix. xx ; J. W. 

 Gidley, Proc. U.S. Nat. Mus., vol. xlvi (1913), pp. 445—448, text-figs. 1—4. 



1 E. Hennig, Sitzungsb. Gesell. naturf. Freunde, Berlin, 1913, pp. 309, 315. 



19 



