Plate 4. 

 Bolinopsis infundibulum. 



Fig. 12. Side view of half -grown specimen, twice natural size. East- 

 port, Maine, August 20, 1897. 



Fig. 13. Side view of half-grown specimen, twice natural size, show- 

 ing winding course of meridional ventral vessels in oral 

 lobes. Eastport, Maine, August 23, 1897. 



Fig. 14. Side view of full-grown specimen, natural size. Eastport, 

 Maine, September 22, 1898. 



Fig. 15. Sense-organ of ctenophore shown in figure 14. 



Drawn from life, by the author. 



