352 MEMOIRS OF THE CARNEGIE MUSEUM. 



same region, which had been submitted to Hermann von Meyer and studied by 

 him.^ In 1854 appeared the handsome memoir of ThioUiere, upon which his 

 claims for recognition as a student of paleichthyology chiefly rest.^ The sequel 

 to this work was not completed during the author's life-time, although a dozen 

 plates intended for its illustration had been printed in 1858, and were exhibited 

 before the visiting members of the French Geological Society at a meeting held at 

 Nevers in that year. A short paper presented by ThioUiere on this occasion was 

 his last published contribution,* death having ensued a few months later; but in 

 1873 the aforementioned plates were issued under the editorial care of M. Paul 

 Gervais, accompanied by annotated extracts from some of ThioUiere's earlier 

 writings, and by essays on the local paleobotany and a stratigraphic section at 

 the hands of Count de Saporta and MM. Falsan and Dumortier. This publication, 

 designated as " seconde livraison," appears under the same title as ThioUiere's 

 memoir of 1854, and is evidently intended to be supplementary to it. 



At the beginning of his introductory remarks prefixed to the memoir of 1873 

 just referred to. Professor Gervais makes the following significant observation: 

 " Une etude plus complete de la collection ThioUiere, aujourd'hui deposee au 

 Museum de Lyon, et une nouvelle comparaison des poissons qu'elle comprend 

 avec ceux qu' on a recueillis dans les terrains analogues de la Baviere et ailleurs, 

 conduiront a des resultats plus importants encore. Nous ne saurions trop re- 

 commander ces recherches aux naturalistes qui seront en mesure de les accomplir." 



We have quoted the foregoing remarks in order to show that it was realized 

 by competent paleontologists two score years ago that a thorough-going revision 

 and comparative study of the Solenhofen and Cerin vertebrate faunas was a de- 

 sideratum, and that such an investigation promised extremely valuable results. 

 ThioUiere and Andreas Wagner of Munich had previously held the same opinion, 

 as wiU appear from the following comments of the first-named author, with reference 

 to the collections from Solenhofen: " On salt que les richesses dont il s'agit n'ont 

 pas ete suffisamment etudiees par M. Agassiz. II est urgent, comme le remarque 



^ Premiere notice sur un nouveau gisement de poissons fossiles dans le Jura du D6partement de 1' Ain. 

 Annales de la Soc. Nationale d'Agriculture, Histoire Naturelle, et Arts Utiles de Lyon, Vol. I, 1849, 

 pp. 43-66. 



Seconde notice sur le gisement et sur les corps organises fossiles des calcaires lithographiques dans 

 le Jura du D^partement de I'Ain, comprenant la description de deux reptiles in6dits provenant de ces 

 couches, par M. Hermann de Meyer. Lyons, 1850, p. 80, with 2 plates. 



' " Description des Poissons Fossiles Provenant des Gisements Coralliens du Jura dans le Bugey." 

 Lyons, 1854, pp. 28, with 10 plates. 



* "Notice sur les Poissons Fossiles du Bugey et sur 1' Application de la M6thode de Cuvier k leur 

 Classement." Bull. Soc. GM. de France, Vol. XV, p. 782. 



