132 



CERCARIA. 



Animalculum mufculofum , contraQile , cylindraceum, 

 cute memhranacea cryftallina, (]uafi vagina, difcinfte vedhuin, 

 capite, trunco & caudi compofitum. Caput flavicans dimidio 

 trunco fere majus, apice dcorfuni in uncam parvum prodiic- 

 tum, ultra vaginam produci & rctrahi poteft. In abdomine in- 

 tellinum duplex flavicans lon2;itudinale , alterum anguilius, 

 utrumque mobile. Maffa obfcurior duriufcula in cohtclionc 

 corporis & capitis', ac mufculus deglutorius major mobilis, 

 alternatim fefe aperiens & claudens. Intra apicem organura 

 micans utrinque pellucet. Cauda corpori homogenea, at an- 

 guftior lobata, duabus fpinis validis pcllucidis tcrminarur; hje 

 vel in angulum acutum, aut reftum , vcl paralkle, extendun- 

 tur. Ipia cauda quoque intra corpus condi potell. 



Siepe fingulari corporis inflexione fefe in dimidiae magni- 

 'tudinis velumen corripit aquam forte hauricns, ac raox producit. 



In aquofis, ubi Letmia vegetat, raro. 



/3) Aliam pofthac vidi huic maxime affinem, & forfitan 

 tantum varictatem, cujus defcriptionem ulterius examinandam 

 & comparandam hic fubjungerc lubct: 



Erat folida, teres, mutica; caudabrevi, articulis &cufpidi- 

 bus binis. Organum rotatorium adeHc, ex utrinque propendenti- 

 bus fafciculis pilorum minimorum raro vifibilium, & luorc rota- 

 tiunis, conjicitur. Ab altcro laterein corpore jacet maffa oblonga, 

 flava, granulofa, an ovarium? Huic adjacet alii angullior alba 

 & longior, an inieltinum caecum? in anrica corporis partc mu- 

 fculus didymus, qui dctruditur & elevatur, an cor feu mufcu- 

 lus deglutorius? alia molecula opaca, rotunda, mobilis, fplen- 

 dida, cujus ufus vix conllat. Cauda biarticulata; cufpidcs bi- 

 nne vix articulo longiores. Aqua cxhalaia valde in globum cou- 

 trahitur , in moIecuLis n©n effunditur. 



Fig. 14 & 16. Cerc. Ltipuvi-, produftum, 

 jg. capite & Ciiuda coiiditis, 



Fig. 



