230 TEN years' progress IX VERTEBRATE PALEONTOLOGY 



Mesozoic onward to our own day. Mention may be made at this point 

 of at least one specimen of Dercetis^ from. the Lebanon Cretaceous which 

 seems to prove that some of these deep-sea fishes were provided with a 

 distensible stomach, as is commonly true of modern forms. 



To pass in review the large series of important contributions to the 

 literature of Mesozoic and Cenozoic fishes that has appeared during the 

 past decade would exceed the limits assigned to the present article. 

 ISTevertheless a few words may be said concerning the nature of the pub- 

 lications covering these topics. The greater number of memoirs consists 

 of those which take account of the entire assemblage of fossil fishes 

 occurring within certain stratigraphic horizons — that is to say, the 

 subject-matter is treated from the faunistic standpoint, including de- 

 scriptions of new genera and species. Less in number, but paramount in 

 interest and importance, are the series of papers whose purpose it is to 

 elucidate the structure of particular fossil forms, to inquire into their 

 systematic relations and phylogeny, or to throw light on various matters 

 relating to their environment, distribution, and the like. Among the 

 latter class of contributions may be mentioned, for instance, the papers 

 by AbeP and Dollo^ on extinct flying-fishes, those by Campbell Brown* 

 and Ernst Koken^ on the genus Hybodus, one by Erwin Hennig^ on 

 Pycnodonts, another by Eudolf Cramer^ on Eocene species of Mene, 

 Bassani's memoir on Myripristis,^ and similar studies by other Italian 

 authors. 



A bare enumeration of titles of some of the more important faunistic 

 monographs that have enriched the literature witliin the last ten years 

 must sufiice for the present article. Among memoirs devoted to Triassic 

 fish faunas, those by Bassani, Schellwien, Kramberger, and De-Alessan- 

 dri^ are of the highest excellence. In this country the Triassic fish faunas 

 of New Jersey and Connecticut have been reviewed in bulletins published 

 by the State geological surveys of those commonwealths, and the con- 



* This specimen is figured by A. S. Woodward in Natural Science, 1898. vol. xll. pi. x. 

 3 O. Abel : Fossile Flugfische. Verb, deutsch. Zool. Ges., loten Vers., 1905, pp. 47-48. 

 3 L. Dollo : Les poissons voiliers. Zool. Jahrb., Abth. Syst., 1909, vol. xxvil, pp. 419- 



438. 



* C. Brown : Leber das Genus Hybodus und seine systematische Stellung. Palseontogr., 

 1900, vol. xlvi, pp. 149-175. 



^ E. Koken : Leber Hybodus. Geol. Palppont. Abhandl.. 1907. n. s.. vol. v. pp. 1-18. 



« E. Hennig : Gyrodus und die Organisation der Pyknodonten. Pala-ontogr.. 1906. vol. 

 nil, pp. 137-208. 



' R. Cramer: Mene rhomheus (Volta). Zeitschr. deutsch. geol. Ges., 1906, vol. Ivill. 



8 F. Bassani : Sopra un Bericide del calcare miocenico di Lecce, etc. Atti della R. 

 Accad. Scienze di Napoli, 1911, vol. xv, pp. 1-15. 



» G. De-Alessandri : Studii sui pesci triasici della Lombardia. Mem. Soc Ital. Scl. 

 Nat., 1910, vol. vii, pp. 1-147. 



