VORTICELLA. 263 
a, Apertura circularis. b. Cilia fafeiculata. 
c - -  reniformis d papilla media, 
e. Poflica obtufa. — f, acuminata,  g. atte- 
nuata. kh. Veficule pellucids. 
292. VORTICELLA NIGRA. 
VonTICELLA trochiformis nigra. Ta5. XXXVII. 
Fig. i-—24. * 
Vorücella Nigra, erm. fer. €? fluv. 102. Zoof. 
Dan. brodr. 2530. 
Schwarze Vortücelle , Ber/ig. Befcbeft. 4. p. 47. 
Naturf. 18. p. 80. t. 2. £. c. 
Oculo nudo fe fiftunt pun&a minima nigra in fuperficie 
aque fingulatim narantia; quodlibet microfcopio fubje&um vi- 
detur corpufeulum conicum, opacum, altera extremitate ven- 
tricofum,  obtüfum, altera acuminatum ; | aucta valde. maguitu- 
dine, utrinque in extremitate obiufa. uncinuli duo pellaeidi 
candidi in confpectum prodiere. | Hi organum rotatorium in- 
confpicuum produnt, eorum tamen ope in aqua progreditur. 
Motus vacillans fere continuus & in fummo aqua. My- 
riades latus vafeuli vitrei lumini obverfum querunt, pun&orum- 
que nigrorum adinftar eidem adherent; latus a lumine averfum 
mox deferunt, illuminatum occupature. Sepe quatuor & plu- 
res cauda unit? circumnatant, 
In pratis inundatis Auguílo ac in Cozfervzs foffarum 
copiofe. 
Fig, 
