G-erould. — Caudina. 
PLATE 2. 
Abbreviations. 
cl. sns. Sensory cell of epithelium. 
cl. sst. Supporting cell of epithelium. 
gl. tbl. Tubular gland cell. 
Figs. 6-8. Supporting cells from epithelium of tentacles. X 940. 
Fig. 9. Sensory cell from epithelium of the tentacles. X 940. 
Fig. 10. Tubular gland cell from the tentacles. X 940. 
Figs. 11, lla. Muscle cells from a radial longitudinal muscle band. X 222. 
Fig. 12. The same in a state of contraction. X 222. 
Fig. 13. One half of a muscle fiber from the pharynx. X 360. 
Fig. 14. Middle part of the same. X 700. 
Fig. 15. Group of cells seen in a cross section of tentacle. X 940. 
Fig. 16. Longitudinal section through the axial side of one of the inner pro 
cesses of a tentacle. X 490. 
