104 
BRITISH ENTOMOSTRACA. 
Intestine straight, not convoluted ; but more distinctly 
curved at its upper extremity than in the other Daphniadse. 
Hab . — Pond at Southall, Middlesex, June 1841; 
Sept. 1849. Pond at Highgate, July 1842; Sept. 1849. 
Belfast, May 1849, W. Thompson, Esq. 
2. Macrothrix roseus. 
Monocultjs eosetjs, Jurine, Hist. Monoc., t. 15, f. 4,5. 
Lyncetjs eoseus, Desmarest, Cons. gen. et part.,, 376, t. 54, f. 8-9. 
Daphnia eosea, M. Edwards, Hist. Nat. Crust., iii, 384, No. 14. 
— Yarrell, British Eishes, ii, 93, vignette. 
Maceotheix eosetjs, Baird , Trans. Berw. Nat. Club, ii, 149. 
This species differs very little from the preceding. The 
shell or carapace is smooth, and very transparent ; an- 
teriorly it is ciliated. The superior antennae are longer 
and narrower than in laticornis , and are furnished with 
three very short setae at their extremity. The eye is con- 
siderably smaller, and has no areola round it. The colour 
of the whole animal is of a rosy hue. Eggs two. 
It swims horizontally ; and when it bounds through 
the water, the motions of its arms are soft and graceful. 
It forms great part of the food of the Yen dace ( Corre - 
gomes Willughbii). 
M. Edwards considers this and the preceding to be 
the same species. 
Hab . — Lochmaben Loch, Dumfriesshire, Sir W. 
Jardine, Bart., W. Yarrell, Esq. 
As I have not seen this species, I have not figured it. 
It may turn out to be only a variety of the preceding, if 
not exactly the same. 
