[335] THE BRYOZOA 243 



ABBREVIATIONS USED IN THE FIGURES. 



av. avicularium. 



ar. area. 



a rt. articulation . 



ap. aperture. 



b. beak. 



bus. basal. 



bifur. bifurcation of branch. 



d. denticle. 



emb. embryo. 

 f. a. frontal avicularium. 

 fi. $p. flattened spine. 

 /. lines of calcification. 

 lat. lateral. 

 m. margin. 

 man. mandible. 

 mus. app. muscular apparatus. 

 ae. cecium. 

 op. operculum. 

 or. orifice. 

 ped. peduncle. 

 r.f. radical fiber. 

 sp. spine. 

 zee. z cecium. 



