506 
APPENDIX. 
vent, are black, obscurely tinted with purple or green in parts. 
Tarsi black; eyes hazel. 
Dr. Thomson procured specimens of this bird at BImbia, in 
different stages of plumage; in one the crest was all green, in 
another, apparently older, the black line was visible above the 
green, and in a third this was surmounted by the purple. In all 
other particulars they were identical, 
Presented to the British Museum. 
Order. GALLINACEA. 
Genus. Colimha, 
Treron crassirostris. (Fraser, in Proc. Zook Soc. Lond., 
Feb., 1843.) 
Trer. viridis; capite, collo, pectoreque cinerascenti-viridibus; 
ventre citrino; alarum tectricibus regione carpali vinaceo pur- 
pureis; rcmigibus fusco-nigrescentibus; cauda nigra ad apicem 
late cinereo-fasciata; rostro magno, pedibusque pallidis. 
Long. tot. 12 unc.; also, (>f ; caudm, 4^; rostri, 11 lin. 
Habitat. Islands of St. Thomas and Rollas, West Africa, 
where it abounds, together with many other varieties of 
pigeons. 
“ This species is remarkable for its stout bill, which is of a 
very pale grayish colour, tinted with yellow on the upper surface 
at the base. The viuaceous patch at the angle of the wing is 
hut of small extent; the primaries, secondaries, and some of the 
greater wing coverts are narrowly margined externally with 
bright yellow, and the vent and some of the under tail coverts, 
as well as the greater portion of the feathers covering the thighs, 
are of the same colour; the larger under tail coverts are of a 
reddish brown colour, and the feet are yellow. 
Dr. Thomson sent a specimen to the Zoological Society’s 
Museum, from which it was described by Mr. Fraser, and figured 
in \iiBZoologia typica. The food of this Treron was, in January, 
the small fruit of a species of Capparis. 
