G. MENIPEA. 63 



Their height never exceeds a decimetre. 



The Menipeas are found at the base of marine 

 plants, or on the solid polypidoms of the equatorial 

 seas, and attach themselves by numerous fibres. 



CURLED. 



1. Men I PEA cirrata. Stem very branched, dichoto- 

 mous, and curved inwardly ; articulations nearly oval, 

 and ciliated on their external side. 



Indian ocean, and Mediterranean. 



FAN-SHAPED. 



2. Menipea flahellum. Stem branching and di- 

 chotomous ; articulations of an angular form, entire, 

 truncated at both ends. 



Indian and American seas. 



WOOLLY. 



3. Menipea ^occosa. Stem very branching and 

 dichotomous; articulations nearly cuneiform, and 

 slightly toothed at the edges. 



Indian ocean. 



GLASSY. 



4. Menipea hyalcza. Articulations convex, 

 smooth and shining underneath ; flat or concave on 

 the side where the cells open ; subcuneiform, thin at 

 the edges, and terminated above by two prickly 

 appendages: colour yellowish fawn; height a deci- 

 metre. — Plate 3. fig. 4. a. B. C. D. 



Indian seas. 



