1868.] DR. J. MURIE ON GEOPSITTACUS OCCIDENTALIS. 



161 



lively longer than is common to the Parrot tribe. They are clothed 

 with small hexagonal scales, closely set together, which upon the 

 toes, OH their upper surface, are gradually altered into narrow par- 

 tially transverse scutella (fig. 2). 



Fig. 3. 



Fig. 2. 



Fig. 2. Left foot of G. occidentalis (dorsal surface). 

 3. Plantar surface of right foot. (Both nat. size.) 



The claws are moderately strong and curved. 



A better idea may be formed of any differences, if they exist, be- 

 tween this nocturnal species and the Grouud-Parrakeet by a tabular 

 view of the limb-proportions. I have added also the measurements 

 of specimens of two other genera, not very distantly related, and 

 from birds nearly equivalent in general size. 



Comparative lengths of the tarsus, digits, and claws in four genera 



of Parrots. 



Length of tarsus 



Ist digit (inner hind toe), length to root of claw.. 



Length of the claw 



2nd digit (inner front toe), length to root of claw 



Length of the claw 



3rd digit (outer front toe), length to root of claw 



Length of the claw 



4th digit (outer hind toe), length to root of claw 



Length of the claw , 



1^ 



10 10 

 0-35 0-3 





s^ 



0-2 

 0-4 

 0-2 

 0-7 

 0-3 

 0-5 

 0-5 



0-2 

 0-3 

 0-3 

 0-7 

 0-4 

 0-5 

 0-4 



0-8 



0-35 



0-24 



0-5 



0-3 



0-7 



0-3 



0-65 



0-33: 



i 



►Si 



0-5 



0-22 



0-2 



0-3 



0-2] 



0-5 



0-3 



0-48 



0-21 



It will be seen from the above that Geopsittacus and Pezopo- 

 rus resemble each other closely so far as the length of the tarsus 

 Proc. Zool. Soc— 1868, No. XL 



