VII 



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

 of the eolony. When used ahout the single parts of a zocreium, for instanee the s])ines, it 

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



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

 While in most Cheilostomata tlie zoa'cia have separate lateral walls the terminal walls arc 

 as a rule common to two successive zoa'cia in the same longitudinal row and there- 

 fore the distal wall of the proximal zoax'ium is at the same time the proximal wall 

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

 pag. 11). 



