86 



DISTRIBUTION IN NATURE 



IX 



Nassa incrassata^^^: Carotene. 

 Nassa reticulaia^^^: Carotene. 

 Natica nitida^^^: Carotene, xantho- 



phylK?). 

 Neptunea antiqua^^^' ^°''. 

 Patella vulgaris^^^: Carotene, xantho- 



phyll. 

 Purpurea lapillus^^^: Carotene, xan- 



thophyll. 

 Rissoa species^**: Carotene, xantho- 



phyll. 



Scalaria elatior^^^' 299 



Stylifer stylifera'^^^. 



Trivia europaea^^^: Carotene. 



Trochus zizyphiniis^^^: Carotene, 



xanthophyll( ?). 

 Turritella coniniunis'^^: Carotene, 



xanthophyll(?). 

 Velutina velutina^^^: Carotene, xan- 



thophyll(?). 



c) Echinoderms 



Numerous species of echinoderms contain carotenoids. Here, too, specific 

 polyene pigments are sometimes associated with particular animals. It is not 

 known whether the carotenoids are derived from the food or whether they are 

 synthesized by the animal. Most of the data regarding the distribution of 

 carotenoids in echinoderms are of a qualitative nature, and cannot, therefore, 

 be regarded as conclusive. 



TABLE 22 (References see p. 99-107) 



CAROTENOIDS 



I Asteroidea 



Aster ias glacialis^^^: Carotene, xan- 

 thophyll(?), 296. 



Asterias muelleri^^^' ^^^. 



Asterias rubens-^^' ^°*' ^°5: Asterin- 

 acid(?)30'. 



Asterina gibbosa^^^' ^^^: Xanthophyll. 



Astropecten irregularis^^^' ^"'': Xantho- 

 phyll( ?), carotene. 



Astropecten aurantiaciis^"^: Xantho- 

 phyll. 



Asteracanthion glacialis'^^^: Xantho- 

 phyll. 



Cribella oculata"^^^: Carotene. 



Crossaster papposus^^^' ^°*: Carotene, 

 xanthophyll( ?). 



IN ECHINODERMS 



Goniaster equestris^^^: Carotene. 



Henricia sanguinolenta^^^: Carotene, 

 xanthophylP°*. 



Hippasteria phrygiana^^^: Astacene, 

 carotene, xanthophyll. 



Luidia sarsii^^^' ^°*: Carotene. 



Ophidiaster ophidianus^"^: Astacene. 



Porania pulvillns^^^: Carotene, xan- 

 thophyll. 



Solaster papposa'^^^: Carotene. 



Stichastrella endeca^°^. 



Stichastrella rosea^^^. 



(ii) Ophiuroidea 



Amphiura chiajei"^^^' ^''^■. Carotene(?) 



xanthophyll. 

 A mphiura filiformis^'^^. 

 Ophiocoma nigra^^^' ^^'^: Carotene(?), 



xanthophyll. 

 Ophiopholis aculeata^^^' ^"*. 



Ophiothrix fragilis^^^' ^°^: Astacene, 



carotene ( ?). 

 Ophiura affinis^"*. 

 Ophiura texturata^^^' ^°*: Carotene ( ?) 



xanthophyll. 



