CALyPTROPHORAD^E. 



41 



longer than the diameter of the stem, ascending, truncated at the 

 tip, placed rather irregularly, subalternate (rarely subopposite) on 

 each side of the stem and branches ; axis pale greyish brown. 

 Scirpearia dichotoma, Gray, P. Z. S. 1859, p. 481. 

 Hah. Mauritius. 



t Scales larger. 



Fam. 17. CALYPTROPHORADtE. 



Coral cylindrical, furcately branched ; the branches elongate, sub- 

 simple. The axis horny (?) near the apex, cylindrical, tapering. Bark 

 thin, entirely formed of a single series of thin lines and calcareous 

 scales, with regular equidistant whorls of cells. Cells with a circular 

 mouth having a raised edge, placed close together and forming a 

 raised ring round the coral. Each cell is furnished with two 

 obconic pellucid cells placed one on the other ; the lower cell 

 apparently articulated to the axis of the coral, very narrow near 



Fio-. 18. 



( 'ahiptrophora Japan icu. 



