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BRITISH ENTOMOSTRACA. 
eggs ; 20th, a fourth accouchement ; 21st, moulted, and 
has two eggs ; 22d, a fifth accouchement ; 23d, moulted, 
and has two eggs; 25th, a sixth accouchement; 26th, 
moulted, and has two eggs ; 28th, a seventh accouche- 
ment; July 3d, moulted, and has two eggs; 8th, an eighth 
accouchement; 9th, moulted, cannot exactly determine 
whether it has eggs, the insect is yellow; 11th, moulted, 
cannot see eggs ; 14th, ninth accouchement, young ones 
dead; 15th, mother herself is dead.* The young are 
born perfect ; and even before they are ushered into the 
world, whilst still in the matrix, we discover the eye and 
its accompanying black spot. These insects are said by 
Jurine to be subject, like the Daphniadae, to the saddle or 
ephippium, and he asserts that in each ephippium there 
is only one egg, which is placed in the middle of the 
saddle, and makes a projection from it. 1 have never 
myself met with an individual having the saddle; and 
in general I have found those which I have kept very 
short-lived as compared with the Daphniadae. The 
motion of these insects through the water is somewhat 
different from that belonging to the Daphniadae. Instead 
of swimming by short irregular bounds, as these latter 
do, they direct themselves by a rapid motion of their in- 
ferior antennae, or rami, and legs, straight towards the 
point to which they wish to go. This was noticed by 
Eichhorn, as already mentioned, who seems to be the only 
person who remarks it till the time of Jurine ; and it ap- 
pears chiefly perhaps to depend upon the comparative 
shortness and position of the rami, for the Bosmina longi- 
rostris , which has also very short rami, situated as in the 
Lynceidae, has the same kind of motion. f The food of 
the Lynceidae consists of both animal and vegetable 
matter, and while they prey upon animalcules smaller 
than themselves, they, in their turn, are devoured in great 
numbers by insects larger than they are. According to 
Pritchard, the Cltydorus sphcericus is the choice food of 
* Jurine, Hist, des Monoc., pp. 155-6. 
f Mag. Zool. and Bot., ii, 412. 
