CERCARIA. 129 



133. CERCARIA CRUMENA. 



Cercaria cylindraceo-vencricofa, antice oblique 

 truncata; caudalinean bicufi^idata. Tab, XX. Fig. 

 4-6. 



Corpus ventricoro-cylindiiciu-n, mufculofum &torofum, 

 poftice angudius Caput figuram colli imitatur, fere duplo an- 

 guftius trunco , cujus margine bati fua cinguur, ac intra eun- 

 d:m continuo retrahitur & protruditur, apice autem truncatuni 

 & ample patulum. In antica trunci parte misfculus tcres de- 

 glutorius confpicitur. Nec cilia nec vibrantcs pilos dctcgerc 

 potui, motus tamen vicinorum animalculorum involuntaiius or- 

 gana qualiacunque adeffe arguit. Apertura coUi interdum den- 

 tata videtur Cnuda linearis teres hjaltna, inarticulata, ia 

 cufpidcs brc\ifl)mas emarginata. 



In infufo UhieLi/iZ-t.e mirlaQ. 



Fig. 4. 5. 6, Cerr. Crumenam-, vario fitu ampliatim, 

 exhibent. 

 a. Caput exrenfum. b. retraQum. 



c. Mufculus deglutorius. 



d. Truncus torofus. 



e. Cauda luicaris. f. Cufpides caudaf. 



134. CERCARIA CATELLUS» 



Cercarl\, tripartica, cauda bifeta. Tab. XX» 

 Fi^. 10. 11. 



R Cer- 



