I92I.J 



A. RoBEKTSON : Report on Bryo~oa. 



51 



Obtained on the Orissa coast at the mouth of the Devi river, 

 Bay of Bengal, dredged at depths varying from 23 to 25 fathoms. 



1>"IG. 7. 



-Meinbranipora devinensi': 

 nov. X 50. 



33. Membranipora hug- 

 liensis, sp. nov. 



Zoarium growing in a sin- 

 gle layer on chips of wood 

 to which hydroid stems ad- 

 here and encircling these 

 stems, where it forms small 

 bilaminate expansions. 



Zocecia elongated, aperture 

 occupying three-fourths of 

 the front or more, surround- 

 ed by a delicate calcareous 

 border crenulated on the 

 inner margin (fig. 8). The 

 lower part of the front of 

 the zocecia covered with a 

 calcareous layer. The dis- 

 tal portion of each zooecium 

 projecting over the zooecium 

 above almost to the crenu- 

 lated margin of the aper- 

 ture. Where the zocecia are 

 crowded, the aperture much 

 reduced and may become almost circular. That part of the zoa- 

 rium growing flat and single layered is without spines, while 



that part which climbs on 

 the hydroid stems and 

 sends out bilaminate folds, 

 possesses many conspicuous 

 basal spines. Usually each 

 zocEcium in the spinous re- 

 gion possesses two or more 

 spines situated on the calca- 

 reous laj'er of the front wall 

 just below the aperture. In 

 some cases where the zocecia 

 are narrowed below, but one 

 process maj' occur, usually 

 then in the middle of the 

 lower front wall. In still 

 other instances no spines 

 occur on the double layered 

 portion. These spines (sp.) 

 are tall, hollow, tapering 

 processes formed of a trans- 

 sp. parent membrane, and lined 

 with a delicate epithelium 



Fig. 8. 



-Membranipora h uglieiisis, 

 nov. X go. 



