Plate 15. 



Fig. 67. Bero'e cucumis. 29 mm. long. Eastport, Maine, August 

 14, 1897, 



Fig. 68. Bero'e ovata. Natural size. St. Mary's River, Maryland, 

 November 11, 1905. 



Fig. 69. Bero'e ovata. View looking down upon aboral pole of spec- 

 imen represented in figure 68, to show lateral compression 

 of funnel-axis. 



Figs. 70 and 71. Larval stages of Beroe. Newport, Rhode Island,. 

 July, 1892, Agassiz Laboratory. 



Drawn from life, by the author. 



