358 ANIMAL PAEASITES. 



3*57, ex aliis ad 4-56'" V. long a ; incapitis apice cum appendicibus 

 0-196 mill.= 0-087'" P.= 0-089'" V. ; sine appendicibus 0-065 mill. 

 = 0-029'" P.= 0-0298'" V. ; in medio corpore 0'49 ad 0'59 mill. 

 0-21 0-26'" P.= 0-22 0-27'" V. ; extremitas caudalis acutissima. 

 Longitudo caudce (i. e., partis, inter anum et apicem) 1-798 mill. 

 = 0-797'" P.= 0-819'" V.; latitudo cauda ad anum ipsam 0'26 

 .= 0-116'" P.= 0-119'" V., inde diminuta. (Esophagus 0'65 

 .= 0-29'" P. = 0-298'" V. longus, in capitis apice 0-065 mill.= 

 0-029'" P.= 0-0298'" V., in par te posterior e 0-098 mill = 0-043'" 

 P. = 0-044'" V. latus. Strictura tubi intestinalis pone cesophagum 

 uti in maribus perbrevis et 0-028 mill, seu 0"128'" P. et V. lata. 

 Ventriculus 0-172 mill.= 0-0768"' P. et V. et longus et latus, inter- 

 dum latitudine aliquid minor. Vagina ex Dujardini mensuris 

 1*8 mill, ex meis ad 1*64 mill.= 0-7'" pone caput sita ; in vivis 1 -06 

 1-2 ?w//.= 0-46 0-54"' longa et O'il mill.= 0-049'" lata; cum 

 foramine latitudinis 0*13 mill.= : 0'06'", longitudinis 0*15 mill. =: 

 0*07'"; uterus duplex, cujus ramus posterior 20 mt//. == 0'9 // ', cw/w* 

 anterior 1*35 mi//.= 0-6'" longus ; ramosurn ovulis impletorum lati- 

 tudo ad 0-4 wz//.= 0-18'" 6tf ^^//rfl ot?w/w expulsis, 0-2 mi//.= Q-09'"; 

 ovarium duplex, in transitu uteri in anum 0-03 m^/.=0'015 /// 

 latum. 



Ovula fere oblonga, non symmetrica ; ex Dujardini mensuris 

 0'055 mill, lata et 0*064 mill, longa, ex meis media in parte 

 ovulorum 0-029 mill. = 0-012"' P. = 0-015'" V., in apicibus 

 circiter 0'012 mill. = 0-005'" P. = 0-006"' V. lata et 0-05 mill. = 

 0-022"' P. et V. longa. Embryones viventes in ovulis nondum 



In regard to size, three forms are met with. 



1. The mature females, which are remarkable from their size, 

 thickness, and whiteness, as well as by the fine, acute, capillary 

 tail, with an obtuse, broad head. 



2. The young immature females, which as regards colour are 

 to be distinguished by nothing from the pale gray males, or at 

 the utmost by their somewhat larger size, but which are easily 

 recognised by their acute tails, and exhibit the female sexual 

 organs in various grades of development, according to their age. 



3. The mature males, which are rendered remarkable by their 

 pale silver- gray colour and their obtuse anterior and posterior 

 extremities, as also by the penis. 



I pass over the form of the immature males, as they have not 



