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EXPLANATION OF 
PLATE III. 
Fig. 1. Crisia tricyttara, p. 61. 
a. A branch, of the natural size. 
B. The fore part of an articulation, magnified. 
C. The back. 
2. Acamarchis Neritina, p. 58. 
a. A branch, of the natural size. 
B. A fragment of a magnified branch, shown in 
the back. 
3. Acamarchis dentata , p. 59. 
a. A branch, of the natural size. 
B. Fragment of a magnified branch, seen in 
front. 
Nota. In B, Fig. 1, as well as B, fig. 3, are shown many 
cells which have lost their upper membrane. 
4. Menipea Hyaleea, p. 63. 
a. A branch, of the natural size. 
B. Cell magnified, seen in front. 
C. Ditto, seen in the back. 
D. Cells magnified, seen sidewise. 
5 Eucratea chelata , p. 64. 
a. The fragment of a branch, magnified. 
6. JEtea anguina , p. 65. 
a. Fragment of a branch magnified, with the 
cells in various positions. 
7. Pasithea tulipifera, p. 67. 
a. Fragment of a branch, magnified. 
8. Pasithea quadridentata , p. 67. 
a. Fragment of a branch, magnified. 
B. Ovarium transversely striated, and magnified. 
