In 107, under Divico, two of their tribes, the Tougeni and Tigurini, crossed the Jura and made their way as far as Aginnum (Agen on the Garonne), where they utterly defeated the Romans under L.
North of that river the parallel chains of the Jura form an arc of a circle with its convexity towards the north-west.
Included therein are the dairying and horse-raising district of northern Brittany and the dairying regions of Jura and Savoy.
The characteristic feature of this portion of the course of the Rhone is the number of narrow gorges or cluses through which it rushes, while it is forced by the southern spur of the Jura to run in a southerly direction, till, after rounding the base of that spur, it can flow freely westwards to Lyons.
DOUBS, a river of eastern France, rising in the Jura at the foot of the Noirmont ridge at a height of 3074 ft.
It rises at the upper or eastern extremity of the Swiss canton of the Valais, flows between the Bernese Alps (N.) and the Lepontine and Pennine Alps (S.) till it expands into the Lake of Geneva, winds round the southernmost spurs of the Jura range, receives at Lyons its principal tributary, the Saline, and then turns southward through France till, by many mouths, it enters that part of the Mediterranean which is rightly called the Golfe du Lion (sometimes wrongly the Gulf of Lyons).
Hence the river, already of considerable size, pursues a north-westerly direction, skirting the spurs of the Frankish Jura in a pleasant valley.
The Paps of Jura, for instance, rise out of a long belt of quartzite which stretches through the islands of Islay, Jura and Scarba.
A chain of hills culminating in the Paps of Jura - Beinn-an-Oir (2571 ft.) and Beinn Chaolais (2407 ft.) - runs the whole length of the island, interrupted only by Tarbert loch, an arm of the sea, which forms an indentation nearly 6 m.
The poorer grazing lands on the upper levels of the Alps, Pyrenees, Jura and Vosges, the Landes, the more outlying regions of the central plateau, southern Brittany, Sologne, Berry, ChampagnePouilleuse, the Crau and the Carnargue, these districts being given over for the most part to sheep-raising.