HELMINTHOLOGY PSEUDOHELMINTHES. 499 



long, presented twelve belts beset with spiculfe, and at one 

 extremity of the body a horny organ with a double hook, 

 which Mayer was inclined to look upon as the penis. The 

 Reporter, in these vermicnli, recognises nothing but the 

 larvae of a viviparous Tachina, which had probably been 

 devoured by the Frog, and its progeny, then creeping out of 

 the swallowed Fly, had instinctively bored their way through 

 the membranes of the Frog's stomach, and thus arrived 

 between the layers of the peritoneum ; seeing also that 

 these larvae are compelled to work their way through the 

 integument of the body of the Caterpillars, in consequence 

 of the want of an ovipositor in their mother ; and for which 

 purpose the booklets on the belts, which are directed back- 

 wards, and the horny pointed jaws, which Mayer was inclined 

 to regard as a penis, are of great use. 



A case is related by Hampeis (Oesterreich. medizin. 

 Wochenschrift, 1844, p. 729), in which a number of worms 

 moved about in the cavity of the carious knee-joint of a 

 soldier. Hampeis did not know what to make of these 

 worms, as in their figure they did not correspond with any of 

 the known Entozoa. But from tbe description he gives of 

 these problematic creatures, it is easy to guess that they 

 were nothing but the maggots of a Fly. Various older and 

 more recent cases, in which insects and their larvpe, and 

 other animals, have strayed as pseudo-parasites into the 

 human body, have been collected by Hager (Die fremden 

 Korper im Menschen, 1844) and Tiedemann (Von lebenden, 

 Wu'rmern u. Insekteu in den Geruchsorganen des Menschen, 

 1844). 



A case given by Green (Rare case of Filamentous or 

 entozoon Worms, in the Lancet, 1842-3, vol. ii, No. 9, 

 p. 294) appears to the Reporter very extraordinary. A lady 

 took a sulphur-bath, and was afterwards covered with 

 hundreds of minute worms, which, whilst she was dressing, 

 fell to the ground, springing from the skin to a distance of 

 from twelve to twenty inches. They were more than half 

 an inch to an inch in length, of a pale red colour ; the larger 



