•110 ANIMAL PARASITES. 



in the Subdivision II, Euascaridce, and these again in Division I, 

 Apterocephalce (caput non alatum), and in their principal sec- 

 tion A, Gijnuioascaridce (corpus inerme). Dujardin, to whom I 

 adhere here, and who has separated the Ascarides from the 

 Oxyurides, describes the former as follows : 



Ascarides : corpora albo aut subfiavo, subcylindrico, utrinque 

 attenualo, fusiformi, 4 striis longitudinalibus subalbis, opacis, 

 Unearibus, instructo ; cute transverse striata, capitc tubus, valvulis 

 (labiis) convexis aut semilunaribus, interne finestratis, cesophago 

 valde musculoso, cylindrico aut clavaformi ; ventriculo caviiatum 

 triangularum prabente. 



Mas minor, quam femina ; extremitate caudali aliquid curvatd 

 et involutd, nunc nudd, nunc membrand alatd duplici, aut duplici 

 tuberculorum et papillarum ordine aut rarissime acetabulo instructd ; 

 caudd breviore, obtusiore quam in feminis ; spiculo aut pene duplice 

 plus minusve longo et arcualo. 



Femina caudd rectiore et longiore ; vagina slmplici antrorsum 

 sitd ; utero bi- aut midtiloculari ; ov arils filiformibus, longissimis, 

 duplicibus aut multiplicibus ; ovula elliptica aut globulosa, extus 

 Icevia. Species aut ovi- aut viviparce, plerumque in tubo intestinali 

 viventes. 



The only species to be referred to here is, 



1. Ascaris htmbricoides. 



It is placed by Dujardin as the first species in his first subgenus. 

 Ascarides vera [uteris 2 brachiis paralleliter ad caudam versus 

 directis instructa), Sectio prima ■' Ascarides oesophago simplice aut 

 cum aut sine ventriculo, sed sine appendicis pyloricis. With 

 Diesing one species stands as above, A. Gymnoascarida, c. corpus 

 utrinque cequaliter attenuatum. 49. Ascaris lumbricoides, Linne. 

 With the sole exceptions of Goeze, who calls the worm Ascaris 

 gigas, and Zeder, who names it Fusaria lumbricoides, authors have 

 retained the Linnean name Ascaris lumbricoides for this worm. 



Vermes albi aut rubro- pallidi, cylindrici, in extremitatibus 

 attenuati, fusiformes, elastici ; cute transverse subarticulata striis 

 transversis O02 mill, inter se distantibus, ex duobus stratis com- 

 posita, 4 lineis lateralibus longitudinalibus subalbis majoribus capite 

 distincto, parvo (0*7 mill, lato), tribus valvulis semilunaribus, 

 prominentibus , ad margines hyalinis armato, interne denticulatum 

 muscidorum stratum ad galli jubce modum prccbente ; cesophago 



