388 GROUND-THRUSH—GROUSE 
know, under very similar conditions. Nine species of Geospiza have 
been described, five of Camarhynchus and four of Cactornis. All these 
birds have a sombre coloration, in many deepening to a pitch-black. 
Further particulars respecting them are to be found in the Zoology 
of the Voyage of the ‘ Beagle,” and in Mr. Salvin’s paper ‘On the 
Avifauna of the Galapagos Archipelago” (Trans. Zool. Soc. 1x. pp. 
447-510), from which last the accompanying illustrations are 
borrowed. 
G. G. fortis. 
G. fortis. G. fuliginosa. G. parvula, 
SERIES OF FORMS OF GEOSPIZA. 
(From the Transactions of the Zoological Society.) 
GROUND-THRUSH, a name long ago used for birds of the 
genus Pirra and its allies (Jerdon, B. Ind. i. p. 502); but latterly 
an attempt has been made (Cat. B. Br. Mus. v. p. 147) to foist it 
on a composite group of some 40 species of THRUSHES which have 
been referred to a ghost-like genus Geocichla, the characters and 
type of which continue to defy discovery.! 
GROUSE, a word of uncertain origin,? now used generally by 
ornithologists to include all the “rough-footed” Gallinaceous birds, 
1 The assertion (loc. cit.) that Kuhl, to whom the establishment of this sup- 
posed genus is attributed, founded it ‘“‘in some popular Dutch periodical,” is 
unconfirmed by evidence, and is contradicted by all we know of his strictly 
scientific practice. 
2 It seems first to occur (fide O. Salusbury Brereton, Archexologia, iii. p. 157) 
as ‘‘Grows” in an ordinance for the regulation of the royal household dated 
‘‘apud Eltham, mens. Jan. 22 Hen. VIII.” (i.e. 1531), and considering the 
locality must refer to Black game. It is found in an Act of Parliament 1 Jae. I. 
cap. 27, § 2 (i.e. 1603), and, as reprinted in the Statutes at Large, stands as now 
