Prof. J. V. Barboza du Bocage on Hyalonema lusitanicum. 123 
spots*, although they are very faintly represented in the figure 
attached. It is the same in the case of Lafresnaye’s descrip- 
tion of his Brachyptrallus ralloides, which is to be referred to 
the stripe-winged species. It becomes evident, therefore, that 
Mr. Gould has been in error in referring the smaller Tasmanian 
bird to Tribonyx Mortiert; and I propose to call it Tribonyx 
Gouldi, after its discoverer. We may then distinguish the three 
species (two of which are now living in the Society’s collection, 
where also the third was exhibited alive a few years since) as 
follows :— 
1. Tribonyx Mortiert. 
Tribonyx Mortieri, Du Bus, Bull. Ac. Brux. vii. p. 215 (cum fig.). 
Brachyptrallus ralloides, Lafr. Rev. Zool. 1840, p. 232. 
Diagn. Major ; alis albo striatis ; plaga magna hypochondriali 
alba. 
- Hab. Western Australia. 
In vivario Soc. Zool. Londin. Specimen unicum ! 
2. Tribonyx Gouldi. 
Tribonyx Mortieri, Gould, Birds of Austr, vi. pl.71; ejusd. Handb. ii. p. 324, 
Diagn. Medius ; alis immaculatis ; plaga magna hypochon- 
driali alba. 
Hab. Tasmania. 
Nuper in vivario Soc. Zool. Londin. 
3. Tribonyx ventralis. 
Gallinula ventralis, Gould, Proc. Zool. Soc. 1836, p. 
Tribonyx ventralis, Gould, Birds of Austr. vi. pl. 725  Handb. to Birds of 
Austr. ii. p. 325, : : 
Diagn. Minor ; alis immaculatis ; hypochondriis nigris, albo 
guttatis. 
Hab. New South Wales, Southern Australia, Victoria and 
Western Australia (Gould). 
_ In vivario Soe. Zool. Londin. 
XIX.—On Hyalonema lusitanicum. By J. V. Barsoza pu 
BocaGe. 
Letters addressed to Dr. J. E. Gray. 
My DEAR SiR, Lisbon, May 25, 1867. 
On my return from a journey of a few weeks to our northern 
provinces I have just received three of your letters, the last of 
* © Tectricibus alarum mediis et minoribus cinereo-olivaceis, albo termi- 
natis, et longitrorsum in medio striatis.”—Du Bus. 
