21 



EXPLANATION OF PLATE V. 



Fig. 1. a. Natural size. 



b. Magnified view of Turns neglecta. 



c. Entrance of gastro-vascular canals into the base of the peduncle. 



d. Cellular base of peduncle. 



e. Middle portion of peduncle with ovaries and some detached but adherent 



ova. 

 /. Lower or oral portion of peduncle. 

 Fig. 2. Specimen corrugated by immersion in strong saline solution or spirit. 



a, a, a, a. Four gastro-vascular canals. 



b, b. Marginal canal. 

 Fig. 3. Specimen partially reverted. 



a. Disk, turned back and the margin inflected. 



b. Middle portion of peduncle, with the cordiform ovary. 



c. Oral or labial portion. 



Fig. 4. Specimen completely reverted, stomach turned inside out ; the ovaries seen 



through its stretched walls. 

 Fig. 5. Side view of ovary partially detached at the base. 

 Fig. 6. Side view of ovary in situ. 



Fig. 7. Specimen partially reverted ; shows the thickened angles of the peduncle. 

 Fig. 8. a. Muscular substance of subumbrella. 



b, b, b. Ova in an early stage of development. 



c. Lining membrane of subumbrella, which appears often to contain nucle- 



ated cells. 



d. Epithelial lining of canals. 



e, e. More mature ova. 



Fig. 9. Section of ovary, seen in profile. 



Fig. 10. Cellular tissue of base of peduncle. 



Fig. 11. Cellular tissue of wall of peduncle or stomach. 



Fig. 12. Tentacular bulb and ocellus. 



a. Upper spot or cavity of bulb. (The luminous gland ?) 



b. The lower spot or so-termed ocellus. 



