OS Bush — Dates of Publication of Fossil Yertehrates. 



la converture exterieiire du livre et la date de 1846 est dans 

 rinterieur." 



In the library of the Yale University Museum, there is a 

 perfect reprint of Aymard's original article (pp. 1-45), also 

 printed by Gaudelet at Fuy. On the title page of this extract 

 the year 1848 appears, indicating that separate copies were not 

 published until two years later than the volume of Annals con- 

 taining the original description of Entelodon. 



Two species, Entelodon magnus and E. Eonzonii^ are 

 defined by Aymard in his origiual paper ; the former is 

 regarded as the type, and is figured in the plate (figures 1-4) 

 accompanying the article. 



Bothriodon, Ancodus, and Hyopotamus. 



Bothriodon Aymard, 1846, Ann. Soc. d'Agric, Sci., Arts et Commerce du 

 Puy, tome xii, pp. 239, 246 (note). Eeprint, pp. 15, 22 (footnote), 1848. 



Ancodus Pomel, 1847, Arch. Sci. Phys. Nat,, Geneve, tome v, p. 207. 



Hyopotamus Owen, 1848, Quart. Journ. Geol. Soc. London, vol. iv, p. 

 104, i)ls. vii, viii. 



The argument relating to the genus Entelodon likewise 

 applies to the name Bothriodon^ the latter having been pro- 

 posed by Aymard in Yol. XII of the Annals of the Society at 

 Puy, in 1846. In regard to the genera Ancodus and Hyojpot- 

 amus Dr. O. P. Hay in his recent Bibliography and Cata- 

 logue of the Eossil Yertehrata of North America (Bull. U. S. 

 Geol. Surv., No. 179, p. 652, 1902) states that Ancodus ante- 

 dates Hyopotamus. It will be seen, however, that Bothrio- 

 don has claim to priority over both the other genera. 



In his original paper, Aymard proposes two species of Both- 

 riodon^ which he regarded as a subgenus : " I'une, a museau 

 tres large \J)otriodon 2)lcdorynchus']\ 1' autre, a tmiseau etroit 

 \hot leptorynclms'lP He further states: "II y en a une troi- 

 sieme beaucoup plus petite, qui pourra conserver le nom de 

 velctunus^ impose par Cuvier a I'espece type." 



The data here presented led Professor Marsh to adopt the 

 use of the generic names Cardiodon (Cetiosaurus),^ Entelo- 

 don (Elotherium),f and Bothriodon (Ancodus, Hyopotamus), 

 although the last term has not his sanction through publication. 



Paleontological Laboratory, Yale University Museum, June 1, 1903. 



* This Journal (3), vol. i, p. 496, December, 1895 ; The Dinosaurs of North 

 America, 16th Ann. Eept. U. S. Geol. Surv., p. 242, 1896. 



f Johnson's Universal Cyclopaedia, vol. viii, p. 498, fig. 47, 1895 ; Verte- 

 brate Fossils of the Denver Basin, Mon. U. S. Geol. Surv., vol. xxvii, pp. 

 522, 523 (fig. 97), p. 548, and pi. xxx, 1897. 



