Trichostrongyle Genua from an ArmddlJlo. 119 



anus. The vagina ia sliort and straight, mea3uring only 

 about 45/* ill loiigtii. It leads direct into the well-duveloded 

 ovijectors. The ovijectors are straight and divergent, and 

 the combined length of their muscular portions, including the 

 sphincters, is about "45 mm. 



The left uterus joins the anterior ovijector; the right 

 uterus passes down the body more or less parallel to that of 

 the right side, and extends further backwards than the posterior 

 ovijector ; having reached its posterior limit, it recurves 

 sharply forwards and joins the posterior ovijector. 



The coils of the ovaries extend into the anterior part of the 

 body, the termination of the right ovary being situated 

 sliglitly more than 1 mm. from the anterior end. 



The eggs are large, oval, and thin-shelled, measuring 

 108 /i by 54 /i ; prior to being laid they already are in the 

 morula-stage, and in females which were kept in normal 

 saline overnight the eggs were observed to have erabryonated 

 in utero. 



From the anus the body tapers abruptly to form a short 

 tail, about 75 /x long. 



Parona and Stossich, in their description of (Esophago- 

 stomum tuberculatum, write " Peculiari e curiosi sono i tuber- 

 coli della pelle, clie le danno il carattere veramente specifico." 

 In all the specimens from Euphrectus [Dasypus) villosus 

 examined I was unable to find any indications of these 

 tubercles either in living or preserved worms. I can thus 

 only presume that the tubercles seen by them were artificial 

 and due to poor fixation. Further, they state that the 

 mouth is " circondata da un esilissimo cercine." This 1 was 

 unable to see. 'I'he vesicular swelling of the head passes 

 very slightly anterior to the mouth-aperture, and it would 

 a|)pear that the ring or cap surrounding the mouth observed 

 by them must be this slight projecting portion of the vesicular 

 swelling, which, at its junction with the mouth-aperture, may 

 have the appearance of a chitinous ring. 



They also mention the presence of three minute papilla3 on 

 the tip of the tail of the female, and, although I have 

 repeatedly sought for these, I am unable to find any signs of 

 them. 



The entire absence of a mouth-capsule with its leaf-crown, 

 and the nature of the spicules and bursa, are sufficient to 

 show that this parasite does not belong to the genus (Esopha- 

 gostomum, Molin, ISGl. The mouth- and head-characters, 



