P) Euglenales 



Euglena heiiorubescens^^^: Astacene. 

 Etiglena sanguinea^^^' ^*°. 



y) Dinoflagellatae 

 Ceratium tripos^^^. 

 Ceraiium fusus^^^. 

 Ceratium furco^^^ 

 Dinophysis acuta^^^. 

 Dinophysis laevis^^^. 



d) Heterocontae 



Botvydium granulatum^^^: Carotene, 

 fucoxanthin. 



CAROTENOIDS IN PLANTS 



Euglena viridis^^^' ^"' ^°®. 



79 



Glenodinium species^^^. 

 Gymnodiniuni helix^^^. 

 Peridinium diver gens^^^. 

 Prorocentruni micans^^^. 



Botrydium species^ 



(iv). Bacillariophyta 

 Diatomeae 



Achnantidium lanceolata'^'^^ . 



Cymatopleura solea^^^. 



Eunotia pectinalis^'^^. 



Fragilaria species^^. 



Gomphoncma species^^i, i5_ 



Melosira species^'^. 



Navicula species^^' i*^: Carotene, fuco- 

 xanthin, zeaxanthin. 



Navicula torquatum*^^: /5-Carotene, 

 e-carotene. 



Nitzschia closterium}^^' ^°^' ^^^' *^^ 



/3-Carotene, cryptoxanthin, xantho- 

 phyll, isoxanthophyll(?), fucoxan- 

 thin, pigment of unknown con- 

 stitution. 



Nitzschia Palea^^^. 



Nitzschia sigmoidea^^'^. 



Nitzschia species^^*' *^®: "Diatoxan- 

 thin", "diadinoxanthin", fucoxan- 

 thin, "neo-fucoxanthin A", "neo- 

 fucoxanthin B". 



(v). Conjugatae 

 Prasiola species^^*. Zygnema cruciatum^^. 



Spirogyra crassa^°^' ^°*' ^^' ^^' ^**. Zygnema pectinatuni^^^: Carotene, 



Spirogyra maxima'^^'^' ^^' ^'*. xanthophyll, fucoxanthin. 



t 



(vi) . Chlorophyceae 



Protococcales 



Chlorella protothecoides'^^ . 



Chlorella variegata^^. 



Haeniatococcus pluvialis = Sphaerella 

 pluvialis^^^' 202. 214. 215, is, u, 216, 217. 

 218 (cf. Z. physiol. Ghent. 267 (1941) 

 281): a-Carotene, ^-carotene, xan- 

 thophyll, zeaxanthin, haematoxan- 

 thin, astacene. (In earlier investig- 

 ations, J. TiscHLER reported a new 

 pigment, euglenarhodon, later 

 shown to be identical with astacene.) 



Hydrodictyon utriculatum^^. 

 Palmellococcus miniatus^^'^. 

 Phyllobium dimorphum^^^. 

 Phyllobium incertum^''-^ . 

 Phyllobium Naegelii'^^^: Carotene, 



xanthophyll. 

 Protococcus pluvialis = Pleurococcus 



pluvialis'^^^' 2i2_ 

 Protococcus vulgaris^^. 

 Scotinosphaera paradoxa^^^. 

 Volvox species2"i. 



