22 Crust, Ejitomostraca, 



II. Ocali pedunculo cUstincto. 



XII. Genus. Branchiopoda. Branchiopode. 



Branchiopoda , Lam. — Apus , Sch.^ff. — Cancer , 

 ZfiN. — Gammarus , Fabricii. 



Corpus filiforme, substantia moUissima. Caput a iho- 



race collo parvo discretum , depressum , latum. Oculi 



duo , laterales , exserti , stipitati , mobiles. Antennas duae , 



supra oculos postice insertae , capillares , biarticulatae , 



breves. Frons teulaculis^corniculisve duobus , mobillbus ) 



in mare corneis, latere externo unidentatis , apice latiore, 



furcato ; in femina , cvlindracea , articulata, diapbana, 



apice papilla instructo -^ filamenta duo capillaria, sim- 



plicia, elongata, frontl, basi tentaculorum inserta^cly- 



peusque antice bifidus , in mare. Os in utroque sexu 



papilla rostriformi , haraulata, corpusculls quatuor suf- 



fulta. 7V'M/^ci^6f corporis cylindricus, supra subcarinatus, 



undecim segmentis ; singulo infra pedibus duobus bran- 



chialibus , foliaceis ; pari anteriore lamellis duabus , 



posticis Iribus , quarum infima in pediculum basi efiPor- 



mata, ullima ovato-lanceolata. Cauda corporis circiter 



longitudine , angustior, subcylindrica, articulis plurimis 



(6^ g), ultimo pinnis duabus. Orgajia sexus oi^ariaque 



ad basin inferam caudae. 



Spec. 1. Branchiopoda stagnalis. Branchiopode stagnal. 



Branchiopoda stagnalis. Lam. System. des anim. sans vert. , 

 pag. i6i: 



Branchiopode stagnal. Latr. Hist. nat. des Crust. et des 

 Insect., tom. k , po,g. 3ig , pl. 56 et 37. 



Cancer stagnatis. Linn. System. nat. , ed. \2 , tom. 1 ,pars 2, 

 pag. io56. — Faun, Suec. , ed. 2. , n° . 2o43. 



Gammarus stagnalis. Fab. Entom. system. , iom, 2, pag- 5i8. 



