Mr. A. Hancock on a species of Hydra. 281 
wing-ribs and the rib-veins are yellow ; the brands and the veins 
are brown, and the latter are very distinct. 
1st var. The seventh joint of the feelers is hardly longer than 
the fourth. 
2nd var. The mouth is dull yellow with a black tip. 
3rd var. The nectaries are one-tenth of the length of the 
body. 
4th var. The legs are black: the base of the thighs is yellow 
in the fore-pair, and has a slight tinge of yellow in the rest. 
The oviparous wingless female? The head, the underside, and 
sometimes the chest, and even the whole body, are red: the 
mouth is pale yellow with a black tip. Found in the autumn. 
The winged male? Black, and very small : the abdomen is very 
dark green: the feelers are a little longer than the body: the 
mouth is dull yellow; its tip and the nectaries are black, and 
the latter are as long as one-sixth of the body : the legs are black ; 
the base of the fore-thighs, and the shanks, except their tips, are 
dark yellow: the wings are nearly twice the length of the body ; 
the wing-ribs are pale yellow. In the beginning of November. 
Length of the body }—3 line; of the wings 13-24 lines. 
[To be continued. ] 
XXVITI.—Notes on a species of Hydra found in the Northumber- 
land Lakes. By Aupany Hancock, Esq. 
[With two Plates. | 
On visiting the Northumberland lakes last August for the pur- 
pose of prosecuting my mquiries respecting the freshwater Asci- 
dian Polypes, I took a very beautiful Hydra abundantly in 
Bromley Lough. On a subsequent occasion numerous speci- 
mens of the same species were also obtamed in Crag Lough. 
They were found associated with the various Bryozoa that 
inhabit these waters, adhermg to the under side of stones that 
lie scattered by their margins, and in situations where there was 
neither mud nor vegetation. From the peculiar character of the 
locality, so different from that of the usual habitat of the Hydra, 
I was induced to examine the specimens with great care, and 
find that they do not exactly agree with any of the known forms, 
though they come very near to H. fusca, of which they may pro- 
bably prove to be a variety. 
On removing from the water a stone to which these Hydre 
are attached, they appear as irregular, minute, depressed globules 
of gelatine of a pale red flesh-colour, dispersed over the surface, 
sometimes in great numbers on one stone, but never crowded on 
each other. When placed ima bottle of water they soon become 
fixed to its sides, and spreading out their tentacles display them- 
