o 3 8 SCIENCE: PROGRESS 



author to reject the idea that they were made by stegocephalian 

 (labyrinthodont) amphibians in favour of the view that they 

 are probably the footprints of a primitive reptile more or less 

 nearly akin to the dinosaurian genus Plateosaurus. 



From the Upper Carboniferous Gaskohle of Bohemia Mr. 

 K. Hummel has described in the Zcits. dentsch. Geol. Ges. for the 

 latter part of 1913 (vol. lxv. pp. 591-5, pi. xviii.) one of the 

 small newt-like stegocephalians of the group Microsauria. It is 

 identified with the genus Ricnodon of Fritsch, and is nearly allied 

 to, if not identical with, the species described as R. dispersus. 

 Both the known species are very rare in the Gaskohle. 



In this place mention may be made of a paper by Dr. 

 J. E. V. Boas, published in the Morphol. Jahrbitch (vol. xlix. 

 pp. 229-301), as being one which deals in part with reptiles 

 and in part with fishes, and also relates as much to existing 

 as to extinct forms. Of an extremely technical nature, it deals 

 with the hind part of the cranial roof and the palato-quadrate 

 bar in the lung-fishes (Dipnoi), and their presumed representa- 

 tives in the skulls of terrestrial vertebrates. 



As regards fossil fishes, reference may be made to the 

 republication in vol. iv. of the Bulletins of the Connecticut 

 Geological and Natural History Survey of an article by 

 Prof. Eastman (originally issued in 191 1) on those of the local 

 Trias. It is prefaced by a note on the study of fossil fishes in 

 general, and contains descriptions, for the most part illustrated, 

 of local species. 



A new subgeneric type of Australian lung-fish {Ceratodus) 

 is indicated by a tooth from the Cretaceous of New South 

 Wales described by Mr. F. Chapman in the Proc. R. Soc. 

 Victoria, vol. xxvii. pp. 25-7. The tooth, which has been 

 converted into precious opal in the process of fossilisation, 

 belongs to the lower jaw, and resembles the Jurassic members 

 of the genus in carrying only four ridges, although in the nature 

 of the grinding surface it is very similar to the teeth of the 

 living C. {Neoceratodus) forsteri. The name of C. (Mesoceratodus) 

 wollastoni is proposed for the Cretaceous species. It may be 

 added that in the Revue scientifique for December 5-12, 1914, 

 a writer suggests that a tooth of Ceratodus in the museum at 

 Cairo indicates the occurrence of that genus in Egyptian strata. 



