276 THE ANIMAL PARASITES OF MAN 



2. Rhabditis niellyi, Blanchard, 1885. 

 Syn. : Leptodera niellyi, Blanchard, 1885. 



In 1882 Nielly had a cabin boy, aged 14 years, under obser- 

 vation in Brest. The lad had never left the neighbourhood of 

 Brest, and had suffered from itching papules on the skin for five or 

 six weeks ; in the papules the observer found one or several rhab- 

 ditis, measuring 033 mm. in length by 0*030 mm. in breadth. 

 Their cuticle presented a delicate transverse striation ; the intestine 

 was the only internal organ recognisable, and it opened some- 

 what in front of the posterior extremity. Therefore, it must have 

 belonged to the rhabditis-like larva of a Nematode, the adult stage 

 of which is unknown. 



The manner of infection was established almost certainly by a further 

 observation of Nielly's ; at the commencement of the illness small Nema- 

 todes were found in the blood of the patient later on, however, they 

 disappeared, neither were Nematodes found in the faeces, urine or sputum. 

 Therefore it must be concluded that the cabin boy, who was in the habit 

 of drinking water from brooks i had thus ingested embryo-containing eggs 

 of a Nematode ; the young hatched out in the intestine, perforated it, 

 reached the blood and then settled in the skin. 1 -V'' 



It may be remarked that skin diseases caused by young Nematodes 

 have also been observed in dogs (Siedamgrotzky, Moller, J. G. Schneider-), 

 foxes (Leuckart) and horses (Semmer) ; Ziirn also found young Nematodes 

 {Anguillulidce} in the flesh of pigs. 



Gen. 2. AnguilMina, Gervais et Beneden, 1859. 



Syn.: Tylenchus, Bastian, 1864. 



Differentiated from Rhabditis by the possession of a spine in the oral 

 cavity ; bursa without papillae in the male ; uterus asymmetrical. Numer- 

 ous species parasitical in plants. 



Anguillulina putrefaciens, Kiihn, 1879. 

 Syn. : Tylenchus putrefaciens, Kiihn ; Trichina contorta, Botkin, 1883. 



In 1883 Botkin (Pet. kl. Wochenschr., 1883) found a small Nematode, 

 which was, however, entirely misunderstood, in the material vomited by a 

 Russian ; this was not, however, a species of Trichinella, but an Anguil- 

 lulina living in onions which had already, in 1879, been described by Kiihn 



1 Nielly, " Un cas de dermatose parasitaire observ pour la premiere fois en France " 

 (Arch. med. nav., 1882, xxxvii., pp. 337 and 488). Bull. Acad. med., 1882 (2) xi DO 

 395, S8i). 



' J Scttneider, J. G., " Nematodenembryon. in d. Haut d. Hundes.," In.-Diss. Basel 

 (Ludwigshof., 1895). 



