62 STUDY OF NATURAL HISTORY. 



every ichthyologist, is, of necessity, so expensive. 

 There is, however, a smaller edition in octavo *, in 

 six parts or volumes, with 216 coloured plates, which, 

 so far as it extends, is equally useful with the folio 

 edition. Bloch has the great excellency of describing 

 such species only as he had himself seen ; a rare 

 quality in the writers of this period, when compilations 

 began to be made in the shape of general systems, 

 which almost brought us back to the age of Gesner 

 and Aldrovandus. Schneider f, however, who pub- 

 lished what he termed the system of his friend, after 

 his death, added separately in two volumes the species 

 described by other authors : but this work we have 

 not seen. Bloch was also the author of a volume on 

 the intestinal worms.;}: His continuator, Professor 

 Schneider, was also attached to the study of the 

 Amphibia, upon which he wrote some dissertations of 

 great merit § ; particularly on the Tortoises, a tribe 

 which was again illustrated in 1792 by the coloured 

 plates of Schcepf.|| 



(27«) Ornithology, as will subsequently appear 

 had been much attended to by the disciples of BufFon ; 



* Idem, en six parties, avec 216 planches. Berlin, 1796 

 8vo. 



f J. G. Schneider. Systema Ichthyologiae de Bloch. 2 vols. 

 8vo. avec 110 fig. Berlin, 1801. (Cuvier.) 



\ Traite sur la Generation des Vers Intestines. Berlin, 

 1782. 4to. 



§ Schneider. General Natural History of the Tortoises 

 (in German). Leipzig, 1783. 8vo. — Amphibiorum Phy- 

 siologiae Specim. 1 et 2. Zullichau, 1797. 4to. 



|| Schcepf. Historia Amphibiorum, Naturalis et Litteraria. 



Fas. 1. et 2. Jena, 1799 and 1801. 8vo Historia Tes- 



tudinum Iconibus illustrata. Erlang. 1792. 4to. 



