CLASS I. CRUSTACEA. ' 77 



of Insects: 1. Les Entoinostraccs (of MiiWer) : 2. Les Crustacis: 3. Les 

 Miiriapodcs. 



" 111 that excellent little work Lc Tableau Elonentaire de I'lHstoh-e 

 Katureile des Animaux, par G. Cuvier (1797), the Crustacea are arranged 

 with the Insectci, Aruchiioidca, and Mi/riapoda, under a division entitled 

 ' Inscctes pnui-viis de ^ih'ichoires, et sans Ai/es,' where they are placed at 

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

 which he afterwards, in his Lei^^ous d'Anatomie Cotnparie, established 

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



" In 1798 Fabricius published a Supplement to his last work, in 

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

 genera, and amended the arrangement of the whole. 



" Lamarck in his Si/sttme des Ayiimaiix sans ]\'rfebres (1801) adopted 

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



" Bosc, who in the same year published his lUsiuu-e Katureile des 

 Crustaccsfuisant Suite a I'edUion de Buff'on par Caslel, in which for tlie 

 first time we are made acquainted with his interesting genus Zo'ea. 



" Latreille in his Hisluire Xaturellc des Crusfaccs et des Insectes, torn. 3. 

 (1S()2,) adopted the class Crustacea, and distributed the genera compos- 

 inir it into two subclasses; 1. Ento/iiostracis: 2. Malacostruccs: exclud- 

 ing however the Tctraccres, (Asellkhc, and Oniscida,) which he referred 

 to a sub-class of Insects. 



" Dumeril (Zoologie Anuh/tique, 180G) arranged these animals into 

 1. Enfomostracis, and 2. Astacoidcs, excluding Oiiiscus, AniuulHlo, &c. 

 %\hich he placed with the apterous insects. 



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

 taceorum et Insectomm, where they are divided into Entomostraca and 

 Malacostraca, the Tetrucera licing referred to the IiibCCts. 



"The same author in his Considerations GcHe?'a/es, &c. (1810) fol- 

 lowed the same divisions, referring however the Tctracera to the Arach- 

 n'oidea. 



" In the seventh volume of the Edinburgh Enc^clopcsdia, axticle 'Crus- 

 taccoh'gi/,'Dv. Leach distributed the Crustacea into three Orders: 1. En- 

 tomosti-aca : 2. JMalucosti'aca: 3. JMi/riapoda: in which the Tetrucera 

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

 from the ]\[t/riapoda (which he established as a distinct Class), and 

 placed them with the ]\Ta!acost?'acain an Order named Gusteruri, where 

 they were associated with the Gananerida:, and considered the Mala- 

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

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

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

 plement to the Encyclopedia Britannica, and in the Bulletin des Sciences 

 for 1816. 



" Blainville in his Frodrome d'une Nouvelk Distribution Systematiqve 

 (Bull, des Sciences, S)-c. 1816) has arranged the Crustacea into three 

 Classes; 1. Dccapodcs: 2. Heteropodis : 3. Tetradecapodes.'' 



