102 BRITISH ENTOMOSTRACA. 



2. MOINA BRACHIATA. Tab. IX, figs. 1, 2. 



MONOCULUS BKACHIATUS, Jurine, Hist. Monoc., 131, t. 12, f. 3, 4. 

 DAPHNIA BRACHIATA, Desmarest, Cons. gen. Crust., 373. 



M. Edwards, Hist. Nat. Crust., iii, 383. 



Baird, Zoologist, i, 196, fig. at p. 193; Trans. 

 Berw. Nat. Club, ii, 148. 



The length of this little creature is about half a line. 

 The shell or covering is of an olive colour, transparent, 

 showing the stomach and intestine very plainly. It bulges 

 out very much posteriorly, giving the animal a very jolly 

 appearance, and is ciliated anteriorly. 



The superior antennae are large and long, projecting 

 straight out from the beak, somewhat cylindrical in shape, 

 giving off from their upper margin one or two small 

 spines, and terminated by several short setae. The main 

 stalk, or basilar joint of the inferior antennae, is very 

 large, and fleshy-looking ; the under edge, for about 

 half its length from the base, being crenated, and having 

 two short setae springing from one of the crenations, or 

 small lobes, at about the middle of its length ; the upper 

 edge also is crenated. The articulations of the branches are 

 somewhat serrated on the edges, and the long setae with 

 which they are furnished are all finely plumose, and jointed 

 about the middle of their length. 



The abdomen has at its extremity eight short spines 

 on the inner edge, and two long, stout claws. The two 

 seta? on the seventh joint of body are long, plumose, and 

 jointed. 



This species is not so active as some others of this 

 genus, owing perhaps partly to the form. It has a great 

 many ova. 



Halt. I first found this species in a stagnant pool in 

 old St. Panrras road, London, nearly opposite old St. 

 Pancras Church, in the summer of 1844. Since then, 

 the pool in which it occurred has been built over. Pond 

 on Blackheath, June 1848. 



