On Freshvafer Fishes from Madognscar. 419 



either sex not exceeding 2 inm. Dist<inceof cloacal aperture 

 of male from tip of tail about 5 mm. Distance of vulva 

 from tip of tail about 1*5-3 mm. 



Hosts : BaUvnoptera phi/salus, B. musculuSj and (?) other 

 Avhales. 



2. Crassicauda hoopis, sp. n. 



[ = (7. cvasstcanda (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 ti[) of tail about 

 5-7 mm. 



Only certain host : Me/japtera nodosa. 



References. 



Raylis, II. A. 1916. " On Crassicauda crassicauda (Crepl.) [Neina- 



toda] and its Hosts," Ann. & Mag. Nat. Hist. (8) xvii. pp. 144-148. 

 Cbepi.ix, F. C. H. 1829. [Descriptions of new species of Filaria and 



Monostnmurii found in '■^ Balcena 7-ostrata"], Verli. d. K. Leop.- 



Carol. Ak. d. Xaturf. (Bonn), xiv. 2 Abtli. pp. 871-882, pi. Hi. 

 Leiper, R. T., and Atkinson, E. L. 1914. "Helunnthes of the 



British Antarctic Expedition, 1910-1913," Proc. Zool. Soc, 



pp. 222-226. 

 . 1915. Parasitic Worms: British Antarctic ('Terra Nova') 



Exp, 1910, Natur.al History Repoi't, Zoology, ii. 3, pp. 19-60, 



pis. i.-v. [British Museum "(Nat. Hist.).] 



LVI. — Freshwater Fishes from Madagascar, 

 By C. Tate Regan, F.R.S. 



(Publislied by permission of the Trustees of the British Museum.) 



I. A Collection made by the Hon. P. A. Metiiuen. 



A collection of fishes made in ]\Iadagascar in lUll by the 

 Hon. P. A. Methuen has been sent to me for determination 

 by the Director of the Transvaal Museum, Pretoria. Tiie 

 list is as follows : — 



Anguillidae. 

 Angmlla mossavihica, Peter.*:!. 

 Lake Alaotra and Ambatoharananji, E. Madagascar. 



