Ankylostoyne from a Leopard. (iOl 



gut were slightly stretched over the tumour, and in some 

 eases they were atrophied or (iisapjjcared com{)letely, the 

 tumour lying beneath the serous eoat of the intestine. 



In the case of Galoncus perniciosus from the tiger, the 

 tumours liave generally a cavity iu which many worms lie 

 coiled tou;ether. The parasites are thus much easier to 

 secure entire. 



In all the eases in which G. perniciosus was found, the 

 death of the animal was ascribed to its presence. The 

 amount of htcmorrhage is excessive, and, moreover, as Perry 

 has shown, intestinal bacteria are enabled to reach the blood- 

 stream along the tract made by the parasites and the animals 

 die of septicaemia. 



Discussion. 



This species is distinguished from Galoncus perniciosus 

 principally by the presence of three pairs of ventral teeth. 

 In G. perniciosus there are only two pairs. Moreover, the 

 teeth in G. perniciosus project directly dorsalwards above 

 the rim of the oral aperture. In G. tridentatus the teeth are 

 directed towards the cavity of the mouth. The tridigitate 

 terminations of the dorsal ray iu G. perniciosus are longer 

 and arise at different levels. In G. tridentatus they are less 

 distinctly separate. In addition, the measurements of the 

 other structures are different. In G. perniciosus the spicules 

 are 2 mm. in length — that is, longer than iu G. tridentatus. 



It is evident that these parasites feed on blood extracted 

 from the host and not on the mucus membrane. It is 

 probable that the closely allied genus Anci/lostoma also feeds 

 on blood and not solely on the mucus membrane of the 

 intestine. 



The genus Galoncus, Raill. & Henry, 1918, was made to 

 include Ancylostoma peruiciosa, von Linstow, 1885. The 

 type-species was first found in the tiger {Felis tit/ris). 

 Strongijlus tubdeformis, Zeder, recorded from the domestic 

 cat, resembles in many points G. perniciosus. It was never 

 recorded again from the same host, and is generally labelled 

 as an undeterminable species. 



1 am iiulebted to Prof. Leiper for the material examined 

 and for advice during its study. 



BiBLIOGUAPHY. 



Blair, "SV. R. 1004. "Internal Parasites in Wild Auimals." Eighth 

 Annual Report of New York Zoolog. Soc. pp. 1(J-17. 



CoHN, L. 1889. '■'• Uncinaria perniciosa,\on hmstovr." Aicbiv. para- 

 sitolog-ie. Vol. ii. 



■GuRLT, E. F. 1847. " Ueber einige Eingeweidewiiruier." — I. Ueber 



Ann. d; Mag. N. Hist. Ser. 'J. Vol. iK. 'd\) 



