410 ANIMAL PARASITES. 



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

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

 tion A, Gymnoascaridce (corpus inerme}. Dujardin, to whom I 

 adhere here, and who has separated the Ascarides from the 

 Oxyurides, describes the former as follows : 



Ascarides ; cor pore albo aut subflavo, subcylindrico, utrinque 

 attenuate, fusiformi, 4 striis lonyitudinalibus subalbis, opacis, 

 linearibus, instructo ; cute transverse striatd, capite tubus, valvulis 

 (labiis) converts aut semilunaribus , interne finestratis, o?sophago 

 valde musculoso, cylindrico aut clavaformi ; ventriculo cavitutum 

 triangularum praebente. 



Mas minor, quam femina ; extremitate caudali aliquid curvatd 

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

 tuberculorum et papillarum or dine aut rarissime acetabulo instructd ; 

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

 plus minusve longo et arcuato. 



Femina caudd rectiore et longiore ; vagina slmplici antrorsum 

 sitd ; utero bi- aut multiloculari ; ovariis filiformibus, longissimis, 

 duplicibus aut multiplicibus ; ovula elliptica aut globulosa, extus 

 laevia. Species aut ovi~ aut viv'tparce, plerumque in tubo intestinali 

 viventes. 



The only species to be referred to here is, 



1. Ascaris lumbricoides. 



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

 Ascarides vera (uteris 2 brachiis paralleliter ad caudam versus 

 directis instruct a], Sectio prima >' Ascarides O2sophago 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 Lirinean 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 

 musculorum stratum ad galli jubce modum prcebente ; ossophago 



