angular and covered with enamel ; and, in the group so characterized, were 

 combined the Ganoids of subsequent authors as well as the Teleostean 

 orders Plectognathi, Lophobranchii, and Nematognathi, and (subsequently) 

 the genus Sudis (Arapaima), the last being regarded as a Coelacanth. 

 The group has not been accepted with these limits or characters. 



But the researches of Prof. Johannes Miiller, on the anatomy and classi- 

 fication of the fishes, culminated at length in his celebrated memoirs on 

 those fishes for which he retained the ordinal name Ganoidei ; those me- 

 moirs have left an impression on Ichthyology perhaps more decided than 

 made by any other contributions to the science, and that published in ex- 

 tenso will ever be classical ; numerous as have been the modifications since 

 introduced into the system, no forms except those recognized by Miiller 

 (unless it be Dipnoi) have since been interjected among the Ganoids. 



Without premonition in any other form, the results of his studies of the 

 Ganoids were announced to the Royal Academy of Sciences of Berlin in 

 December, 1844, 1 and this communication was supplemented, on the 13th 

 February, 1845, by observations on the bulbus arteriosus, and on the 12th 

 March, 1846, by a more extended memoir, giving the results of subsequent 

 investigations. 1 These were combined, and, with his previous contributions 



• Moller (Johannes). Uber den Bau und die Grenzen der Ganoiden und iiber das 



natiirliche System der Fische. • • • Gelesen in der Akadeinie der Wissenschaf- 



teu, am 12 December, 1844. 



Published in abstract in the Monatsberichte der Kiiniglichen Preuss. Akademie 



der Wissenschafteu zu Berlin, 1844, pp. 416-422 ; in advance < Archiv fiir Natur- 



geschichte (Berlin), 11 Jahrg., b. I, 1S45, pp. 91-141 ; in full (with modifications) 



•< Abhandlungen der Kiiniglichen Akademie der Wisseuschaften zn Berlin, 1844 



(1846), pp. 117-216, 6 pi. 



The memoir, as published in the Archiv fiir Naturgcschichte, was translated into 

 French, English, and Italian, viz : — 



Menioire sur les Gano'ides et sur la classification naturelle des Poissous. • • . 



< Annales des Sciences Naturelles, 3 e sSrie, v. 4, 1845, pp. 5-53. 

 This translation was by Dr. Carl Vogt, and was followed by an original memoir 

 (Quelques observations sur les caracteres qui servent a la classification des Poissons 

 Ganoides. Par M. C. Vogt, pp. 53-68, pi. 9), detailing especially the results of his 

 examination of Amia. and first revealing its Ganoid characteristics. 

 On the Structure and Characters of the Ganoidei, and on the natural Classifi- 

 cation of Fishes. ... .< Scientific Memoirs, selected from the Transaction of 

 foreign academies of science and learned societies, and from foreign Journals, 

 edited by Richard Taylor, v. 4, 1846, pp. 499-558. 

 * Fernere Bermerkungen iiber den Bau der Ganoiden, .... < Monats- 



berichte, etc., 1846, pp. 67-85 ; also, _< Archiv fiir Naturgeschichte, 1S46, I, 

 pp. 190-208. 



Further Remarks on the Structure of the Ganoidei, .... < Scientific 



Memoirs, etc., v. 4, pp. 543-55S. 



