38 



COMPARATIVE TABLE OF SPECIES 



Sjjccies. 



Thouarella mose- 

 kyi, Wright 

 aud Studer. 



T. hili/cndnrfi, 

 Stnder. 



Tho-iiarella kiilli- 

 keri, Wright 

 und Studer. 



Appearance of 

 Colony. 



Stenella johnsoni, 

 Wriglit and 

 Studer. 



S. fiigantea, 

 Wright and 

 Studer. 



S. doedciicini, 

 Wright and 

 Studer. 



S. spinosa, Busli 

 Wright and 

 Studer. 



)S'. acantlimn, 

 Wright aud 

 Studer. 



Axis?, branclied 

 or not. 



Branched, ir- 

 regularly 

 dichotoraoufi. 



ihapcd. 



Twigs in two 

 dii'ection.g. 



Twigs from 

 three sides of 

 stem. 



I r r e g u 1 a r 1 y 

 branched. 



Irregularly and 

 densely. 



Irregularly in 

 incomplete 

 i^pirals. 



Twigs may de- 

 velop into 

 branches. 



Branched 



Branched in 

 three direc- 

 tions. 



Axis, Sliape and 

 Colour. 



Axis, Texture 

 and Flexibility. 



Older, dense, 

 horny, and 

 calcareous; 

 y o u n g e r, 

 horny, and 

 feebly calca- 

 reous. 



Slightly curved Den.se, brittle, ; Iridescent, 

 and grooved. | calcareous. 



Iridescence or 

 not. 



Dark l)rown I Hard, brittle, 

 colour. 



Iridescent. 



Deeply striated, 

 dark brown. 



Hard, brittle. 



Brown. 



Thin, somewhat 

 flattened and 

 yellow. 



V a 1, w i t h 

 parallel lon- 

 gitudinal fur- 

 rows, brown. 



Oval. 



Hard, fdjrous, 

 witli calcare- 

 ous corpuscles. 



Slightly calcare- 

 ous, flexible. 



Horny, calcare- 

 o us. r i g i d, 

 brittle. 



Calcareous, 

 brittle in 

 lower part, 

 more flexible 

 ahoxe. 



Surface shining. 



Slight golden 

 lustre. 



