Prof. J. V. Barboza du Socage 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 Mortieri ; 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 Mortieri. 



Tribonyx Mortieri, Du Bus, Bull. Ac. Brux. vii. p. 215 (cum fig.). 

 Brachyptrallus ralloides, Lafr. Rev. Zool. 1840, p. 232. 



Biagn. 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. pi. 71 ; ejusd. Handb. ii. p. 324. 



Biagn. 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. 85. 



Tribonyx ventralis, Gould, Birds of Austr. vi. pi. 72 ; Handb. to Birds of 



Austr. ii. p. 325. 



Diagn. Minor; alis inimaculatis; hypochondriis nigrls, albo 

 guttatis. 



Hab. New South Wales, Southern Australia, Victoria and 

 Western Australia (Gould). 



In vivario Soc. Zool. Londin. 



XIX. — On Hyalonema lusitanicum. By J. V. Barboza du 



BOCAGE. 



Letters addressed to Dr. J. E. Gray. 



My DEAR Sir, Lisbon, May 25, 18G7. 



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-plivaceis, albo ternii- 

 natis, et longitrorsura in medio striatis." — Du Bus. 



