On the Oyiijin and DUtrlhution of the J British Flora. 88 



River Ter. The Ter rises near Felsteacl, flows on to FairsteacT, 

 where it receives a stream from Black Notley, and to Terhng, 

 to which it gives a name, its com'se to its affluence being 

 twelve miles. The entire length of the Chelmer to Malclon 

 is stated by Gibson, probably accurately, as thirty-four, by 

 the Survey as twenty-nine, miles. The estuary of the 

 Blackwater receives four principal streams, two from the 

 south from Woodham Mortimer and Haseleigh, and on the 

 north one from the Tothams and the Lime Brook from the 

 Tolleshunts. 



• The district south of the high road from Snorehani to 

 Bradwell, drained by rivulets running to Danesey Flats, 

 I consider as part of the valley of the Crouch ; but the 

 twenty-four square miles north of the river-mouth, classed 

 apart by the Survey as "small streams," including Virley 

 and Salcot Marsh, I group in the Blackwater Basin. Mersea 

 Island falls most naturally, perhaps, into the Colne district. 

 The Colne Basin includes 407 square miles, and the length 

 of the river — which rises near Bumpstead and Birdbrook, and 

 passes E.S.E. by Yeldham, Hedingham, and Halstead, to 

 Colchester and Mersea Island — is thirty-six miles, according 

 to Gibson, and, probably in fact, but only twenty-four 

 according to the Survey. At Colne Engaine it receives, on 

 its south or right bank, a stream from Weather sfield and 

 Gorsfield, and lower down, on its left bank, one from 

 Pebmarsh. Below Greenstead an affluent enters it from 

 Several Hall, and above Fingrinhoe, opposite Wivenhoe, it 

 receives the Roman River. This stream rises between Earl's 

 Colne and Great Tey, and is first known as Tey Brook ; flows 

 past Aldham, where it is called x\ldham Brook, to Stan way, 

 below which it bears the name of Roman River, and near 

 Abberton receives the Layer Brook from above Layer Marney. 

 The fifty-three square miles between Colchester and Walton 

 mapped by the Survey as drained by such streams as those 

 from Bromley and ]3entley, and the Holland Creek, I place 

 in the Colne sub-province ; but the neighbourhood of Oakley 

 and Wicks belongs to the Stour drainage. 



This latter river rises in the south-west of Suffolk, on the 



