196 



BIRDS. 



Class II. 



TJropygium 



Crissum 



Hectrices 



Pes gressorius 



- - - amhulutor'ius 



- - - cursorius sive tr'i- 



dactylus 



- - - scansorius 



- - lohatus 



- - - pinnatus 



- - - semipalmatus 



- - - palmatus, s. 



natatorius 



- . . digitis4 omnibus 



palmatis 



- - - ungue postico 



sessili 



Pedes compedes 



Coverts of the tail ; those that 

 cover the base of the ia\\,Jg. 12. 



Vent feathers : those which cover 

 the region of the vent. 



The feathers of the tail, Jig. 14. 



Where the outward toe is closely 

 united, almost its whole length, with 

 the middle toe. Example of it in the 

 foot of the Kingfisher,^. 18. 



Foot with four toes, the three 

 fore almost separated to their origin. 



Such as want the back toe,fig. 22. 



The foot of the Woodpecker form- 

 ed for climbing, Jig. 1Q. 



Finned foot, such as those of 

 Grebes,^. 20. 



Scalloped toed, such as that of the 

 Coot and scallop-toed Sandpiper, 

 fig- 21. 



Half-webbed foot, when the webs 

 only reach half way of the toes, 



fig- 23 - 



Full webbed foot,^. 22, 24, 25. 



All the four toes connected by 

 webs, as in the Corvorants^g. 25. 



When the hind claw adheres to the 

 leg without any toe, as in the Petrels, 

 fig- 24. 



When the legs are placed so far 

 behind as to make the bird walk with 

 difficulty, or as if in fetters ; as is the 

 case with the Auks, Grebes, and 

 Divers. 



