PLATE LXXIL 



ma, 



1. Flustrella HisPiDAj p. 50G ; young zooecia. 



2. , zooecia with the spines developed 



around the orifice only. 



3. , a zooecium surrounded by spines. After 



Sraitt. 



4. , the bilabiate orifice with the polypide 



issuing. 



5. , the expanded tentacular bell. 



6. BusKiA NiTENs, p. 532; colony creeping over a 



stem. 



7. , a single cell. 



7 a. , the retractile sheath unrolled, with 



operculum of setse. 



8. RnAl?D0PLEURA COMPACTA, p. .")81. 



8 a. , nat. size. 



9. • , portion of the " axial cord/^ with 



statoblasts {!), seen from below. 



