OF THE KNGLISH LAKE DISTRICT. 423 
. 1. Floutern Tarn. This tarn, which is fairly deep and contains trout, lies, 
at M height o£ about 1250 feet, just on the east of the watershed between 
Ennerdale and Crummock valleys, in a deep hollow in the grassy moor. It 
is on the edge of the area of the Skiddaw Slates, the granite hill of Great 
Borne rising steeply on the south. All around the tarn is swampy ground, 
with trickling springs and hollows filled with Sphagmmi. 
The water is dark and peaty, and the marginal vegetation consists of 
Littorella (dominant) and Lobelia. The tarn drains into Crummock. 
Seven species only of Entomostraca were taken, Bosmina ohtusiroslris being 
the dominant species. A large proportion of the females were ephippial, 
but only one male was seen. Very few females carried summer eggs, so that 
the colony was probably at its maximum and about to die out. Diaptomu.i 
gracilis was abundant, a large proportion being males. All were of a striking 
blue colour, but of quite typical structure. 
2. Greeiidale Tarn lies, at a height of 1320 feet, on the Borrowdale 
volcanic series at the head of a glen north of Wastwater. West of it is a 
gently sloping moor, while east of it rises the bare rocky Middle i'ell. The 
tarn is very shallow, with clear water and stony bottom, the vegetation 
consisting of Lohelia, Littorella, Callitriche, Myrioj?hyllum, and Isoetes. 
While I was unfortunately unable to take the temperature, I can say that 
the water was (Oct. 1st, 1922) so intensely cold that it was impossible to 
wade out and collect in the open. Eleven species of Entomostraca were 
taken, among which DiapJianosoma hracliyunmi was the most abundant. 
Bosmina was common, but none were ephippial. IHaptomus gracilis was 
abundant, and here of a fine red colour*, but the majority were immature. 
Alonopsis elonr/ata was abundant, but none were sexual. 
3. Levers Water, altitude 1350 feet, lies on the Borrowdale volcanic series, 
and is a rather large, nearly circular, tarn in a barren rocky corrie. It owes 
its existence to a morainic dam, but its outlet is artificially controlled and its 
level somewhat raised for the supply of water to the Coniston copper works. 
The floor and sides of the tarn are rocky and without any vegetation, and 
Entomostraca are almost absent. The only species found in quantity was 
Alonopsis elongata, and, besides this species, only a single individual each of 
Bosmina obtusirostris and Acroperus liarpw were taken in spite of prolonged 
search. On tlie other hand, B. obtusirostris was found common in quite a 
small pool near the tarn. 
The lifelessness of this tarn is rather remarkable, and I can offer no 
explanation. 
4. Loiv Water, at a height of 1786 feet, lies in a circular corrie beneath 
the crao-s oE Coniston Old Man, and is, as Levers Water, partly dammed for 
* AVai'd (1904) notes specially the red colour of copepods in eleviited lakes. 
