Coseguina Quiescent 1835 3,600 Chonco ” El Viejo (Belcher, 1838) ” 5,562 Santa Clara ” 4,700 Telica Active 1850 3,800 Orota Quiescent Las Pilas ” 4,000 Axusco, or Asososco Extinct 4,690 Momotombo Active 1852 7,000 Momotombito Extinct Guanapepe ” Nindiri Quiescent Masaya Active 1858 3,000 Mombacho Extinct 5,250 Zapeton, or Zapatera ” Ometepec Active 1883 5,050 Madeira Quiescent 5,000 IN COSTA RICA. Orosi Quiescent 8,650 Rincon de la Vieja ” Miravalles Extinct 5,500 Tenorio ” Los Votos, or Poas ” 10,500 Barba ” Irazu, or Cartago Active 1726 11,450 Turrialba Extinct 12,533 Chiripo ” Besides the volcanoes contained in the preceding list there are in Columbia three volcanic peaks:— Name. Present State. Height. Pico Blanco Extinct 11,740 Rovalo (?) 7,021 Chiriqui (?) 11,265 The volcanoes on the Atlantic coast have been little noticed. Congrehoy Peak has the sharpest cone I have ever seen, almost equalling the impossible cones in Humboldt’s drawings of the Cordilleras; and I regret that the only photograph I was able to make of the mountain-top rising above the low-lying clouds was defective. Trusting too securely to my camera, I did not measure the angle, although the sketch I made just before is quite as the mountain looks. The sharpness is perhaps the result of an eruption said to have taken place a few years ago, when the crater fell in and ashes were carried as far as Belize,—a hundred and fifty miles. Belonging to the same system as Congrehoy and Bonito are the Bay Islands. Of these, Utila shows streams of vesicular basaltic lava, and fragments of a more compact, older basalt; but I have found neither on this island nor on Roatan any signs of a crater. The formation is, however, distinctly volcanic, and apparently of a period anterior to the eruptions which built the Island of Oahu in the Hawaiian Group,—I judge by the amount of decomposition and degradation, the lavas in both cases being similar in composition and physical character. [Illustration: Congrehoy Peak.]