rists, who, however, keep mainly
to a few great centres, though most of the more striking peaks were
first ascended in the late sixties and early seventies of the 19th
century by English mountaineers. Roughly speaking the Dolomite region
lies between the Brenner railway from Franzensfeste to Trent (W.) and
the road over the Monte Croce Pass from Innichen in the Drave valley by
way of the Sexten glen and the Piave valley to Belluno and Feltre (E.).
On the north it is limited by the railway line from Innichen to
Franzensfeste, and on the south by the railway and road from Trent to
Feltre. The highest summit is the Marmolata (10,972 ft.), but far more
typical are the Sorapiss, the Cimon della Pala, the Langkofel, the
Pelmo, the Drei Zinnen, the Sass Maor and the Rosengarten (see ALPS).
Among the chief tourist resorts are St Ulrich (in the Groden valley),
San Martino di Castrozza (near Primiero), Caprile and Cortina d'Ampezzo.

Besides the Dolomites included in the above region there are several
other Dolomite groups (though less extensive) in the Alps. N.W. of Trent
rises the Tosa group, while in Switzerland there are the Piz d'Aela
group, S.W. of Bergun on the Albula Pass route, and the curious little
group N. of the village of Splugen, besides other isolated peaks between
the St Gotthard and Lukmanier Passes. In Dauphine itself (the home of
the geologist Dolomieu) the mountain districts of the Royannais, of the
Vercors, and of the Devoluy (all S.W. of Grenoble) are more or less
Dolomitic in character.

See J. Gilbert and G. C. Churchill, _The Dolomite Mountains_ (London,
1864); Miss L. Tuckett, _Zigzagging among Dolomites_ (London, 1871);
P. Grohmann, _Wanderungen in den Dolomiten_ (Vienna, 1877); L.
Sinigaglia, _Climbing Reminiscences of the Dolomites_ (London, 1896);
_The Climbs of Norman-Neruda_ (London, 1899); V. Wolf von Glanvell,
_Dolomitenfuhrer_ (Vienna, 1898); J. Ball, _Western Alps_ (new ed.,
London, 1898, section 9, Rte. P. French Dolomites). (W. A. B. C.)

DOLPHIN, a name properly belonging to the common cetacean mammal known
as _Delphinus delphis_, but also applied to a number of more or less
nearly allied species. The dolphins, bottle-noses, or, as they are more
commonly called, "porpoises," are found in abundance in all seas, while
some species are inhabitants of large rivers, as the Amazon. They are
among the smaller members of the cetacean order, none exceeding 10 ft.
in length.