122 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 tw^o 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 Daphniadse, 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 Daphniadse. The 

 motion of these insects through the water is somew^hat 

 different from that belonging to the Daphniadae. Instead 

 of swimming by short uTcgular bounds, as these latter 

 do, they direct themselves by a rapid motion of their in- 

 ferior antennse, or rami, and legs, straight towards the 

 point to whicli 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 

 Lynceidse, has the same kind of motion. f The food of 

 the Lynceidse 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 Chi/dorus sjjJio'ricics is the choice food of 



* Jurine, Hist, ties Monoc, pj). 155-6. 

 t Mag. Zool. and Bot., ii, 412. 



