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PLATE 2. 
5. Hormiphora plumosa. Specimen from Tortugas, Florida, 
May 20, 1906. 
6. Surface view of apical pole-plate showing lithocyst. ex, 
excretory pores; #, sensory tracts from sense-organs to 
tows of combs; ts, openings of tentacle sheaths. 
7. Side view of apical sense-organ. 
8. View of tentacle. 8a. Enlarged view of appendages on base 
of tentacle. 
Drawn from life, by the author. 
