VII 



Distal. The part of a zooecium most remote from the primary zooecium (the ancestrula) 

 of the colony. When used about the single parts of a zocecium, for instance the spines, it 

 signifies the part most remote from the point or the surface of fixation. — 



Proximal. The part of a zocecium nearest to the primary zocecium of the colony. 

 "While in most Cheilostomata the zocecia have separate lateral walls the terminal walls are 

 as a rule common to two successive zocecia in the same longitudinal row and there- 

 fore the distal wall of the proximal zooecium is at the same time the proximal wall 

 of the distal zooecium. Only in very few cases is there found separate terminal walls (see 

 pag. 11). 



