ORDER BRANCHIOPODA. 
349 
situated underneath, consisting of two mandibles, swelled, 
arched, and truncated at their lower extremity, and of two 
foliaceous jaws. These parts form, when united, a sort of 
inferior beak. The body, properly so called, is divided into 
twenty-three segments, each supporting, with the exception 
of the last, a pair of branchial feet. All these feet are similar, 
very much compressed, bifid, with the external division simple, 
ciliate at the external edge, and the other quadriarticulate, 
and strongly ciliated at the internal edge. The first twelve 
pairs are of the same length, and larger than the others. 
The length of the latter diminishes progressively. The eleventh 
pair, and the two following, have at their base a slender fila- 
ment, ascending into the cavity, which is between the back 
and the testa, and serving as a support for the eggs. The last 
segment, or tail, is terminated by two filaments. The ovaries 
are interior, and situaied on the sides of the alimentary canal, 
from the base of the first pair of feet as far as the eighteenth, 
and their issue appears to be situated at the root of some of 
them. The eggs, after the laying, occupy the dorsal cavity, 
of which we have spoken, and are attached there, by means 
of small filaments, themselves adhering to those of the sup- 
ports. They are at first round and transparent; they then 
assume a yellowish tint, which afterwards grows obscure at 
the centre, and their figure becomes irregular and angular. 
All the individuals observed by M. Adolphe Brongniart, 
were provided with them. The males, supposing any to exist, 
do not appear at the same time as the females, that is, in 
the month of J une, and are unknown. 
Limnadia Hermani , Adol. Brong. Mem. du Mus. d’Hist. 
Natur. VI. xiii. ; Daplinia gigas. Herm. Mem. Apterol, v., 
has been found in great numbers, in the small pools of the 
forest of Fontainbleau. 
In other cases, each eye is situated at the extremity of a 
pedicle, formed by the lateral and horn-like elongation of each 
