2 2 Crust. JEntomostraca, 



II. Oculi pedunculo dlstincto. 



XII. Genus. Branchiopoba. Branchiopode. 



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

 LiN. — Gammarus , Fabricii. 



Corpus filiforme, siibslantia inollissima. Caput a tho- 



race collo parvo discretum , depressum , latum. Oculi 



duo, laterales , exserli, slipitatl , raobiles. Antenncc dua^ , 



supra oculos postice inserlse , capillares , biarticulatae , 



breves. Frons tentaculis ^ corniculisve duobus , mobilibus j 



in mare corneis, latere externo unidentatis , apice latiore, 



furcato •, in femina, cvlindracea , articulata, diapbana , 



apice papilla instructo \ filamenta duo capillaria, sira- 



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



peusque antice blfidus , in mare. Os in utroque sexu 



papilla rostriformi , bamulata, corpusculis quatuor suf- 



fulta. 7>7mcz/6- corporis cjllndricus, supra subcarinatus, 



undecim segmentis ; singulo infra pedibus duobus bran- 



cbialibus , foliaceis j pari anteriore lamellis duabus , 



poslicis Iribus, quarum infima in pediculum basi efFor- 



mata, ultima ovato-lanceolata. Cauda corporis clrciter 



longltudine , angustior, subcjlindrica, articulis plurimis 



(6^ 9), ultimo pinnis duabus. Ot^gaiia sexus ouariaque 



ad basin inferam caudae. 



Spec. 1. Branchiopoda stagnalis. Branchiopode stagnal. 



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

 pag. 161. 



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

 Insect. , tom. k , pcig. 019, pl. 56 et Sy. 



Cancer stagnalis. Linn. System. nat. , ed. \i , tom. 1 ,pars 3, 

 })ag. io56. — Favn. Suec. , ed. 1 , n". 2o43. 



Gammarus stagnalis. Fal, Entom. system. , tom, 2, pag. 5i8. 



