Ankylostome from a Leopard. 601 
gut were slightly stretched over the tumour, and in some 
cases they were atrophied or disappeared completely, the 
tumour lying beneath the serous coat of the intestine. 
In the case of Galoncus perniciosus from the tiger, the 
tumours have generally a cavity in which many worms lie 
coiled together. The parasites are thus much easier’ to 
secure entire. 
In all the cases in which G. perniciosus was found, the 
death of the animal was ascribed to its presence. The 
amount of hemorrhage 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 septiczemia. 
Discussion. 
This species is distinguished from Galoneus perniciosus 
principally by the presence of three pairs of ventral teeth. 
In G. perniciosus there are only two pairs. Moreover, tlie 
teeth in G. pernicivsus project directly dorsalwards above 
the rim of the oral aperture. In G. tridentatus the teeth are 
directed towards the cavity of the mouth. The trisigitate 
terminations of the dorsal ray in 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 in 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 Ancylostoma also feeds 
on blood and not solely on the mucus membrane of the 
intestine. 
The genus Galoncus, Raill. & Heury, 1918, was made to 
include Ancylostoma perniciosa, von Linstow, 1885. The 
type-species was first found in the tiger (Felis tiyris). 
Strongylus tubeformis, 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. 
I am indebted to Prof. Leiper for the material examined 
and for advice during its study. 
BiBLioGRAPHY. 
Buarr, W. R. 1904. “Internal Parasites in Wild Animals.” ighth 
Annual Report of New York Zoolog. Soc. pp. 16-17. 
Coun, L. 1889. ‘* Uncinaria perniciosa, von Linstow.” Archiy. para- 
sitologie. Vol. ii. 
Guru, I. F. 1847. ‘“ Ueber einige Eingeweidewiirmer.”—I, Ueber 
Ann. & Mag. N. Hist. Ser. 9. Vol. ix. 3Y 
