2%^ oy,jHE CLASSES oyx^HE 



^^^']^)[VQ At\pdides^f(iv the most part are aquatic, animal?, 

 and are all fond, of moisture. They appear to be, low.in 

 the ^cale of intelligence, because, with very few excep- 

 tions, they want the head and consequently the principal 

 organs of sense. They are destitute of any members or 

 limbs for locomotion except setiferous retractile mammulse 

 which many possess, dispose^ in .lateral rows, and which 

 seryefof feet. Ti^eirtnouth, varies excessively in its con- 

 struction,^ beiing,^pntetjaiesf , a prqbDScis furnished Avith 

 nia^Uoe, asin the^e^(E!2//(E Say., sometimes presenting the 

 appearance of^wo lij^Sj^ as ift the SejpulidaE and Lumbri- 

 cif^, and at others, as^^in. the liiiudinidiE, forming a pre- 

 hensile cavity suppU^d witk parts which perform the 

 ofiiee of maxillas, That remarkable character of the Ver- 

 fefow/a, tlie vertical moveiprient of the maxillas, remains 

 .Still, ,i».80ine mea?ure, observable in many of the ./dfwr/e- 

 Udes:, but what particularly distinguishes the two groups 

 frqrn .each other is the nervous system of the latter, which 

 is very distinct, longitudinal, double and knotted, like that 

 of insects. T^e JJiritdinidcB carry this similitude so far 

 ^8 even in general to possess the same number of ganglions. 

 iVi^Q,thei,>remackablejan^ogyf is that wliich the yesiqular 

 . Jjr^anQhice qf sqipe.i-f/j^/^/it^fs.jhear to the vesicular traqhese 

 ^^Jnaany.ijinnulgse aniiuEil^ . That the Anmjides thvji^ly- 

 |i^gjbqtWTe;e;;p.-t)ie-j;wQ.most perfect forms in Zoology^ the 

 p^^^t)5br%te,d anithe Annulose, should be so inferior in the 

 ., j^cBi^i^^ ,an4 power^ of locomotion to both, is certainly very 



"'^erc^iv^'l'hAltti^'^fe 'dWA^pIeiittfHlly.— The first is the Tepoft «? SlM. 

 :^ Ci»*itr^Lainarck,an4 Jyttreille to tjie Acadtmie Rryale des SaencfifnXhe 



J, iisc^veri.!:^^ .(^f '1?^^WJK.''''''^i'i^|Rf\Si %'^^^ ^npeltdes, and the .second is a 

 Me'rhoire by M.Latreiil^ on the external organization of jartlbulated nn- 

 V^riebritdd a\ntaaas, aiid ihit^Vfelaftion il^ich"th^'.^aiefirfejijeftf tij-tlicj/jt.. 

 riafoda^ 



;>f 



