282 



1463. The skull of the Yellow-breasted Toucan (Ramphastos Tucanus). 



The horny sheaths of the mandibles have been removed. 



Mus. Brit. 



1464. The skull of the Red-billed Toucan (Ramphastos erytltrorhynchus). 



Mm. Brit. 



1465. The horny sheath of the upper mandible of the Red-billed Toucan (Ramphas- 

 tos erythrorhynchus). Mus. Brit. 



1466. The lower mandible of a Toucan. Hunterian. 



Genus Corythaix. 



1467. The skull of a Touraco (Corythaix). 



The mastoid and postfrontal processes are small and pointed. The lacrymals are large, as 

 are the antorbital processes of the prefrontals. 



Purchased. 



Genus Picus. 



1468. The skeleton of the Woodpecker (Picus viridis). 



The cranium is remarkable for a shallow canal extended along its upper median line and 

 inclining between the orbits towards the right nostril. The long cornua (thyrohyals) of the 

 hyoid arch play in this groove, having their fixed point in the nostril and arching backwards 

 and downwards over the cranium to join the basihyal. The extremities of the scapula are 

 deflected and slightly expanded. The form and position of the external distal trochlea of the 

 metatarsus present the usual characteristics of this part in the Scansores. The coalesced ter- 

 minal caudal vertebrae develope a broad flat plate below, with a groove on each side between 

 it and the transverse processes, affording a firm basis of attachment to the stiff tail-feathers, 

 which prop up the bird while clinging to the vertical trunk of trees in quest of its insect food. 



Of the 19 vertebrae between the skull and sacrum, the seven posterior bear moveable ribs : 

 of these, the last five pairs unite with the sternum. The first sacral vertebra bears a pair of 

 ribs, which unite with the hcemapophyses of tne last dorsal pair. 



Mus. South. 



1469. The skeleton of a Woodpecker (Picus viridis). 



Of the 19 vertebrae between the skull and sacrum, the six posterior bear moveable ribs, 

 the last five pairs of which unite with the sternum. There is one pair of sacral ribs, which 

 join the last dorsal pair. The sclerotic plates are preserved in this skeleton. 



Purchased. 



