2 
well as in their form, size, and appearance, 
so that hardly any characters, however 
general, will apply to them all. 
Gmelin ranges them in the following 
manner. 
Genus 5, Psittacus, the Parrot*. Ge- 
nus 6, Ramphastos, the Toucan. Genus 7, 
Momotus, the Motmot. Genus 8, Sy- 
throps. Genus 9, Buceros, the Hornbill. 
Genus 10, Buphaga, the Beef -eater. 
Genus 11, Crotophaga, the Ani. Genus 
12, Glaucopis, the Wattle-bird. Genus 
13, Corvus, the Crow. Genus 14, Coraci, 
as the Roller. Genus 15, Oriolus, the 
Oriole. Genus 16, Gracula, the Grakle. 
Genus 17, Paradisea, the Birds of Pa- 
radise. Genus 18, Trogon, the Curu- 
cui. Genus 19, Bucco, the Barbet. Ge- 
nus 20, Cuculus, the Cuckow. Genus 21, 
Yunx, the Wryneck. Genus 22, Picus, 
the Woodpecker. Genus 23, Sitta, the 
Nuthatch. Genus 24, Todus, the Tody. 
Genus 25, Alcedo, the Kingfisher. Ge- 
nus 26, Galbula, the Jacamar. Genus 27, 
* Those printed in Italics are not to be found in the 
British Isles. 
