94 



DISTRIBUTION IN NATURE 



IX 



skin)"*: Carotene, xanthophyll, 

 and decomposition products*. 



Anas platyrhyncha domestical'' ^ 



(yellow foot skin and beak skin): 

 Carotene, xanthophyll and decom- 

 position products. 



Anser domesticus (beak skin)^^®: Caro- 

 tene, xanthophyll and decompo- 

 sition products. 



Aprosmictus melanurus (yellow 



feathers)"^: Astacene( ?) carotenoids 

 of unknown constitution. 



AsUir gentilis (yellow feathers)"*." 

 Carotene, xanthophyll. 



Cacatua roseicapilla (red feathers)"'." 

 Carotenoids with single absorption 

 bands. 



Calurus aurictps (red feathers) ." Ca- 

 rotenoids with single absorption 

 bands. 



Campethera niibica (feathers) ." Caro- 

 tenoids of unknown constitution"''. 



Cardinalis virginianus (feathers)"'." 

 Carotenoids with single absorption 

 bands. 



Cavduelis spinus (feathers)"^." Xantho- 

 phyll and transformation products. 



Carduelis carduelis (feathers)"*." 

 Xanthophyll and transformation 

 products. 



Cerihiola mexicana (feathers)." Caro- 

 tenoids of unknown constitution"'. 



Chloris Moris (feathers)"*." Xantho- 

 phyll and transformation products. 



Chloronerpes auridentus (feathers)^"." 

 unknown pigments. 



Chloronerpes kirki (feathers); Caro- 

 tenoids of unknown constitution"'. 



Chloronerpes yucatensis (feathers)^'*." 

 Picofulvin (violaxanthin and tara- 

 xanthin( ?). 



Chlorophanes atricapilla (feathers)"'; 

 unknown pigments. 



Chrysoptilus punctigula (feathers)"'; 

 Carotenoids of unknown consti- 

 tution. 



Colaptes auratus (feathers)^". 



Colaptes olivaceus (feathers)"'. 



Cotinga coeriilea (feathers)"'; Carote- 

 noids with single absorption bands. 



Cymbirhynchus macrorhynchus^'''' : Ca- 

 rotenoids with single absorption 

 bands. 



Dendropicos cardinalis (feathers)"'. 



Diphyllodes magnijica (yellow neck 

 feathers)"'. 



Dryocopus auratus (feathers)"'. 



Dryohates major (black feathers)"*; 

 Picofulvin. 



Eclectus polychlorus (feathers)"'; Ca- 

 rotenoids with single absorption 

 bands and carotenoids of unknown 

 constitution with two or three ab- 

 sorption bands. 



Emberiza citrinella (feathers) ; Xan- 

 thophyll and decomposition pro- 

 ducts"*' "*. 



Emberiza icterica (feathers)"*; Xan- 

 thophyll and decomposition pro- 

 ducts. 



Euphone nigricollis (feathers)"'; Ca- 

 rotenoids of unknown constitution. 



Fringilla canaria (feathers)"'* ^'*. 



Callus bankiva domesticus'^'''' ' "* 

 (yellow footskin) ; Carotenoids. 



Hypoxanthus rivolii (feathers)"*; 

 Picofulvin. 



Ithaginis cruentatus (feathers)"'; Ca- 

 rotenoids with single absorption 

 bands. 



Loxia curvirostra (feathers)"*' "*; 

 Carotenoids with single absorption 

 bands, xanthophyll and decompo- 

 sition products. 



Lyrurus tetrix^''''' "*; Carotenoids with 

 single absorption bands. 



Megaloprepia magnifica (feathers)"'.' 

 Carotenoids with single absorption 

 bands. 



Milvus (foot skin)"'; Carotenoids with 

 single absorption bands. 



Motacilla cinerea (feathers)"*; Xan- 

 thophyll and decomposition pro- 

 ducts. 



phyll. 



Canaryxanthophyll predominates amongst the transformation products of xantho- 



