On Freshwater Fishes from Madagascar. 419 
either sex not exceeding 2mm, _ Distance of cloacal aperture 
of male from tip of tail about05 mm. _ Distance of vulva 
from tip of tail about 1°5-3 mm. 
a Balenoptera physalus, B. musculus, and (?) other 
whales. 
2. Crassicauda boopis, sp. n. 
[=C. crassicauda (Crepl.) of Leiper and Atkinson, 
1914 & 1915.] 
Spicules absent. Thickness of either sex may reach 3 mm. 
or more. Distance of cloacal aperture of male from tip of 
tail about 1°5 mm. Distance of vulva from tip of tail about 
o-7 mm. 
Only certain host: Alegaptera nodosa. 
REFERENCES. 
Bayuis, H. A. 1916. “On Crassicauda erassicauda (Crepl.) [ Nema- 
toda] and its Hosts,” Ann. & Mag. Nat. Hist. (8) xvii. pp. 144-148, 
CrEPLIN, F.C. H. 1829. [Descriptions of new species of Filaria and 
Monostomum found in “ Balena rostrata” |, Verh. d. K. Leop.- 
Carol. Ak. d. Naturf. (Bonn), xiv. 2 Abth. pp. 871-882, pl. lii. 
Lerprr, R. T., and Atkinson, E. L. 1914. “Helminthes of the 
British Antarctic Expedition, 1910-1913,” Proc. Zool. Soc. 
. 222-226. 
—. 1915. Parasitic Worms: British Antarctic (‘Terra Nova’) 
Exp. 1910, Natural History Report, Zoology, ii. 3, pp. 19-60, 
pls. i—v. [British Museum (Nat. Hist.).] 
LVI.—Freshwater Fishes from Madagascar. 
By C. Tate Recan, F.R.S. 
(Published by permission of the Trustees of the British Museum.) 
I, A COLLECTION MADE BY THE Hon. P. A. METHUEN, 
A COLLECTION of fishes made in Madagascar in 1911 by the 
Hon. P. A. Methuen has been sent to me for determination 
by the Director of the Transvaal Museum, Pretoria. The 
list is as follows :— 
Anguillide. 
Anguilla mossambica, Peters. 
Lake Alaotra and Ambatoharanana, E. Madagascar. 
