CLASS I. CRUSTACEA. 77 



of Insects: l.Les Entomostraccs (of MMev): 2. Les Crustacts: 3. Les 

 Mj/ri(tpodps. 



" In that excellent little work Ze Tableau Elementaae de rUlstoire 

 Nuturclle dcs Anunauv, par G. Cuvici- (1797), the Crustacea ave arranged 

 witli the Inscclu, Arachnu'ulea, and Mj/riapoda, under a division entitled 

 < Inscctes poun-its de Muchoires, et sans Ailts,' where they are placed at 

 the head of the Insects, in a limited and well defined section (A.), 

 which he afterwards, in his Le(;ons d' Anatomic Compurce, estahlished 

 on anatomical principles, as a distinct class, named Crustaccs. 



"^ In 1798 I'abricius published a Supplement to his last work, in 

 which, by the aid of the Baron de Daldorft', he established several new 

 genera, and amended the arrangement of the whole. 



"Lamarck in his Sj/stlme des Animaux sans Vertebres (1801) adopted 

 the Crustacea as a peculiar class. This system was adopted by 



" Bosc, who in the same year published his Histuire Naturelle des 

 Crustaccs fuisant Suite (i i'edition de Buffon par Custel, in which for the 

 first time we are made acquainted with his interesting genus Zuia. 



" Latreille in his Histoire Naturelle des Crustaccs et des Insectes, torn. 3. 

 (1802,) adopted the class Crustacea, and distributed the genera compos- 

 ing it into t^vo subclasses ; 1. Entcmiustracis : 2. Malacoslraccs: exclud- 

 ing however the Tetracercs, (Asellidcr, and Oniscida,) which he referred 

 to a sub-class of Insects. 



" Dumeril (Zoologie Analytique, 180G) arranged these animals into 

 1. Entomostracis, und Q. Astacoides, e\dadmg Oniscus, Armadillo, &c. 

 which he placed with the apterous insects. 



" Latreille in the same year produced his celebrated Genera Crus- 

 taceorum et Insectoruw, where they are divided into Entomostraca and 

 Malacostraca, the Tetracera being referred to the Insects. 



"The same author in his Considerations GtHtrafo, Sec (1810) fol- 

 lowed the same divisions, referring however the Tetracera to the Araclt- 

 noidea. 



" In the seventh volume of the Edinburgh EncijclopxJia,a.v\.\c\e 'Crus- 

 taceologj/,''DT. Leach distributed the Crustacea into three Orders : 1. En- 

 tomostraca: 2. Malacostraca: 3. Myi-iapoda: in which the Tetracera 

 were included. In the Appendix, however, he divided the Tetracera 

 from the Myriapoda (which he established as a distinct Class), and 

 placed them with the Malacostraca in an Order named Gasteruri, where 

 they were associated with the Gammeridtz, and considered the Mala- 

 costraca and Entomostraca as sub-classes. This opinion he has since 

 maintained in a paper published in the eleventh volume of the Trans- 

 actions of the Linnean Societi/ of London, in the first volume of the Sup- 

 plement to the Enci/clopitdia Britannica, and in the Bulletin des Sciences 

 for 1816. 



" Blainville in his Prodrome d'une Nouvelk Distribution Syslematiqve 

 (Bull, des ,Sc/e«<-t:s, 4c. 1816) has arranged the Crustacea' mto three 

 Classes: 1. Decapodes: 2. Heferopodcs: 3. I'dradecapodes.'' 



