PLATE XIX. 



[All figures drawn by aid of a camera lucida except ya, ii, 12, and 13.] 



Fig. I. Menipea ereda sp. nov. Frontal view, showing bifurcation of an inter- 

 node and main points of structure; spine (^^. )i operculum [op.), 

 frontal avicularia {/. a.), CEcia (c. )» ^^d mode of articulation {art.). 



2. Dorsal view of the same, showing the radical fibers {r.f.) and the 

 place of their attachment upon the zoecia. 



3. Scrupocellaria scabra Van Beneden, frontal view. 



4. Dorsal yiew of the same, showing absence of vibracula. 



(336) 



