THE PLATES. 
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Fig. 1 
2 . 
3. 
4, 
Fig. 1 
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3. 
PLATE IV. 
. Amaihia cornuta, p. 69. 
a. Of the natural size. 
B. Groups of cells, magnified. 
Amathia spiralis, p. 69. 
a. Of the natural size. 
B. Fragment of a branch, magnified. 
Nemertesia Janini , p, 71. 
a. The extremity of a stalk, of the natural size, 
B. Fragment of a sprig magnified, garnished 
with its double cells. 
C. Ovarium magnified. 
Aglaophenia arcuata , p» 73. 
a. A branch, of the natural size. 
B. Fragment of a branch, magnified. ] 
PLATE V. 
Dynamena distans, p. 80, 
a. Of the natural size. 
B. Branch with cells, magnified, 
Dynamena diver gens, p. 80. 
a. Of the natural size. 
B. Branch with cells, magnified. 
Sertularia elongata , p. 82. 
a. The natural size. 
B. Branch with its cells, magnified, 
C. Ovarium, 
