ASCARIS MYSTAX. 



325 



will indicate the leading points to be observed ; but I may espe- 

 cially remark upon tlie circumstance, that the so-called "wings " 

 of the head vary considerably in different individuals. This occurs 



Fi&. 69. — 4. Outline of the head of the so-called Ascaris alata ; magnified. — Bellingham, 

 5. Male Ascaris mystax, naturally coiled upon itself; Mr. Scattergood's case. 6. Tail 

 of the same, showing its arcuate outline and double spiculum ; magnified 30 diame- 

 ters. 7. Female Ascaris mystax of the natural size ; Mr. Scattergood's case, 8. Tail 

 of the same, showing the anal cleft and straight ventral border ; X 30 diameters. 9. Head 

 of a female Ascaris mystax with inconspicuous aloe ; from the same case ; viewed from 

 behind ; X 30 diam. 10. Head of the Ascaris outlined at Fig. 7, in which the alee 

 are broader ; magnified 30 diameters j viewed from behind. — Original. 



