DE CONCHIS FLUVIATILIBVS &c. 171 
aerem hatırit, fimul ac nutrimentum capit, exa&t? defcriptam & nitide ri in- 
cifam, ante paucos annos curioforum oculis exhibuit Profeffor quidam Pra- 
genfis in Differtatione cujus titulus + Defenfio ventricularis nobilifimarum 
Oftrearum , earum amatoribur , tempore ojlreas comedendi folitö, communicata 
ab H.M.M. U.P. Prage, impenfis Job. Frid, Rüdigeri 1731. y°. ubi efum 
& ufum oftrearum pro faniori ac optimö ventriculi nutrimentö imd medi- 
camine auftor commendat, u 
Nos igieur diffettionem conch® flaviatilis pariter examini fabjeftam 
quoad faciem externam & internam in effigie oculis intuentium quadrupli- 
ci fötmä confiderandam quä fieri potuit perfpicuitate hic offeremus, 
Tab. IV. Fig. I. 
De figurä externä conche fluviatilis viventis, vegetz, 
atque adhuc claufe. 
Oncha hc Auviatilis zque ac marina teflis bivalvibus oblongis in par« 
te interiori unionum colore fplendefcentibus vifitur. Exteriores tes 
fe colorem nigro- cinereum, fubfufcum oftendunt,, fuperius Fig. I, lir,a, 
craffz ac elevatiores, inferius graciliores & pauld acuminatz, undique ru- 
goßz ac ftriarz, Conchz tergum nexu ac ligamentö corneö lit, b, eftmu- 
nitum, cujus ope fe aperit arque claudit, fuper quod binz (quafi mammil« 
le lit, c. eminent, amiffä cute rudiori ex allifione frequenti nitorem marga- 
ritiformem pr&'fe ferunt, quemadmedum unci recurvati fer@ ad inftar te= 
ftz quoque oram fuperius uniunr, artifimum conch&'gcelufe munimen- 
wm. ; 
Fig. I. 
...... Concham lacuftrem apertam exbibens, 
Lit, a Conchz internam faciem depingit, 
Lit, e, Tympanum expanfum, f, ambabus conchz teflis aut valvis, tympani 
ioftar, obtenfa cuticula, 
Lit, £, Quatuor nervi f, tendines mytili , quorum ope concha tam arte fe 
conftringere valer, ur ne aqu& quidem gurtula vel illabi vel exci- 
dere poflit. Bini faperiores libero confpettui patent, fecus ac infe- 
riores, 
Lit, g, Caro mufcnli denfa, craffa & glandulofa,, pyramidalis. 
Ya Lir, h. 
