ON A COLLECTION OF PARASITES FROM THE SOUDAN 607 
tha (1) which he has named but not yet described from the intestine 
of an Aïrican pigeon. 
The rostellum which is very protruisible in this genus is, as the 
figure indicates, strongly retracted in our specimen, and the length 
of the animals, at mostsome 2-3°m, is markedly less than that named 
by Dr Fuhrmann. It is probable however that our specimens were 
incomplete. 
2. — LixsrowraA LinstTowi (Parona). — Syn. Tænia Linstowi Par. 
This species was first described (as Tænia Linstowi) by Parona (2) 
who recieved specimens from the intestine of a Guinea Fowl(Numida 
ptilorhyncha Licht.) killed in the eastern Soudan. In 1901 however | 
Fuhrmann (3) re-examined Parona’s material and came to the 
interesting conclusion that the parasite in question belonged to 
the genus Linstowia which Zschokke (4%) had established in 1898 
for certain Tape-worms (7. echidnae D’A. W. Thompson (5) found 
in the alimentary canal of the spiny Ant-eater, Echidna histrix, 
and T. Semoni Zsch. of the Bandicoot, Perameles obesula. 
Amongst the parasites collected by M. Hawker in the Soudan 
were à few specimens of this genus taken from a female Guinea 
Fowl (Numida ptilorhyncha) and according to the label on the bottle 
which contained them they were found in the «abdominal cavity 
between gizzard aud ovaries » This position must probably have 
been taken up by the Worms after an escape from the intestine. 
I have little to add to Fuhrmann's description of the species, but 
I can confirm his statement that the rostellum figured by Parona 
does not normally exist. = 
Amongst the material Fuhrmann examined he was able to 
differentiate two species L. Linstowi and L. lata Fuhrmann. The 
specimens Î have all belong to the former as far as I can judge. 
Thus we have in the genus Linstowia, four species : 
1° L. Linstowi (Par.), from the intestine of Numida ptilorhyncha 
Licht., from the Soudan. 
2 L.lata Fuhrmann, from the same host and locality. 
(1) Zool. Anz., XXIV, 1901, p. 273. 
(2) Ann. Mus. Genova, XXII, (Ser. 2, Vol. II), 1885, p. 427. 
(3) Centralblatt für Bakteriol. XXIX, 1901, p. 760. 
(4) Zeitschr. wiss. Zool., LXV, 1899, p. 441. 
(3) J. R, Micr. Soc., 1893, p. 297. 
