STEONGYLI. 375 



I suffer myself from Oxyuris vermicular is, it came into my mind 

 to attain certainty upon this point by the daily examination of 

 the faeces for Oxyurides, for some time. The results of these 

 investigations, which were not made without some self-sacrifice, 

 and which I continued from the 27th August, 1855, to the 25th 

 July, 1856, were published by me in the ' Wochenblatt der 

 Zeitschrift, der K. K. Gesellschaft der Aerzte zu Wien.' In 

 the 329 days of observation, 93 Oxyurides passed spontaneously 

 on 49 days during the wane of the moon ; and during the in- 

 crease of the moon, in all, 57 worms on 36 days. In the time 

 from the full of the moon to its last quarter, there were 19 worm- 

 days, with 41 worms ; in that from the last quarter to new moon, 

 27 worm days, with 46 worms; in that from the new moon to 

 the first quarter, 15 worm days, and 23 worms ; and in that 

 from the first quarter to the full moon, 22 worm days, with 

 38 worms, so that the week from the last quarter to new moon, 

 and after this, the week from the first quarter to full moon, 

 would be the best adapted for the expulsion of worms. It 

 would, however, of course, not be right to confine ourselves to 

 these periods, when time presses. These periods are only to be 

 used as a means of supporting our attempts at cure ; good anthel- 

 minthics expel the worms at any time. The particular days of 

 the phases of the moon have no essential influence upon the spon- 

 taneous passage of the worms, any more than days on which an 

 eclipse of the sun or moon occurs. Of the particular days, it 

 would appear that the most favorable for expulsion would be 

 September, with 16; December, with 11; and November and 

 February, with 9 days on which worms passed spontaneously; 

 next to these, January and June, with 8, and July and October, 

 with 7 such days; the least favorable are April, with 5, March, 

 with 4, and May, with 2 days. 



III. Strongyli and their allies. 



A. Strongyli veri. 



Corpore subcylindrici, utrinque attenuate ; capite nudo, rarius 

 alato, 2 appendicibus later alibus armato ; ore terminali, nudo vel 

 sex papillis instructo, vel orbiculari ; cesophago triangulari, mus- 

 culoso ; cute tenui. Mas : appendice multilobata aut radiata ; 

 penis simplex, vel duplex, multilobatus, ad digitorum instar. 



