1761. Rio Ciloria (42.33N, 3W) La Rioja, Stream 1762. Rio Cinca (41.43N, 0.35E) , Stream 1763. Rio Cinqueta (42.58N, 0.25E) Aragon, Stream 1764. Rio Cinsa (42.5N, 7.57W) Galicia, Stream 1765. Rio Cinta Vieja (40.6N, 0.32W) Aragon, Stream 1766. Rio Cio (41.8N, 0.82E) Cataluna, Stream 1767. Rio Ciruelos (42.02N, 3.28W) Castilla y Leon, Stream 1768. Rio Ciurana (41.13N, 0.65E) Cataluna, Stream 1769. Rio Clamor de Litera (41.57N, 0.3E) , Stream 1770. Rio Clariano (38.88N, 0.5W) Valenciana, Stream 1771. Rio Claro (37.67N, 2.02W) Andalucia, Stream 1772. Rio Cobo (43.7N, 7.45W) Galicia, Stream 1773. Rio Cobos (41.88N, 3.78W) Castilla y Leon, Stream 1774. Rio Codes (42.25N, 6.18W) Castilla y Leon, Stream 1775. Rio Cofio (40.38N, 4.3W) , Stream 1776. Rio Cogollos (42.17N, 4.02W) Castilla y Leon, Stream 1777. Rio Colmenares (41.7N, 6.55W) Castilla y Leon, Stream 1778. Rio Condominas (43.67N, 8.05W) Galicia, Stream 1779. Rio Confrentes (38.33N, 7.02W) Extremadura, Stream 1780. Rio Congost (41.55N, 2.25E) Cataluna, Stream 1781. Rio Conso (42.22N, 7.13W) Galicia, Stream 1782. Rio Corbones (37.6N, 5.65W) , Stream 1783. Rio Corcoles (39.3N, 2.9W) Castilla-La Manacha, Stream 1784. Rio Corcoles (39.48N, 2.35W) Castilla-La Manacha, Stream 1785. Rio Corcos (42.6N, 5.23W) Castilla y Leon, Stream 1786. Rio Cordovin (42.4N, 2.73W) La Rioja, Stream 1787. Rio Cores (42.67N, 8.73W) Galicia, Stream 1788. Rio Corneja (40.47N, 5.5W) Castilla y Leon, Stream 1789. Rio Corneros (37.73N, 1.83W) , Stream 1790. Rio Corp (41.67N, 0.72E) Cataluna, Stream 1791. Rio Correchouso (42.05N, 7.43W) Galicia, Stream 1792. Rio Cortella (42.25N, 8.2W) Galicia, Stream 1793. Rio Cortiella (41.18N, 0.8E) Cataluna, Stream 1794. Rio Corumbel (37.45N, 6.57W) Andalucia, Stream 1795. Rio Corzos (42.25N, 7.02W) Galicia, Stream 1796. Rio Cotorrillo (41.13N, 5.27W) Castilla y Leon, Stream 1797. Rio Cozna (38.07N, 4.68W) Andalucia, Stream 1798. Rio Cripinejo (37.47N, 6.2W) Andalucia, Stream 1799. Rio Crispinejo (37.47N, 6.2W) Andalucia, Stream 1800. Rio Cristobal (41.1N, 3.05W) Castilla-La Manacha, Stream | 1801. Rio Cua (42.5N, 6.77W) Castilla y Leon, Stream 1802. Rio Cubas (43.43N, 3.75W) Cantabria, Stream 1803. Rio Cubas (43.45N, 3.77W) Cantabria, Estuary 1804. Rio Cubeta (42.37N, 8.23W) Galicia, Stream 1805. Rio Cubilar (39.1N, 5.55W) , Stream 1806. Rio Cubillas (37.2N, 3.82W) Andalucia, Stream 1807. Rio Cubillo (42.07N, 3.97W) Castilla y Leon, Stream 1808. Rio Cuerpo de Hombre (40.42N, 6.02W) Castilla y Leon, Stream 1809. Rio Cuervo (40.53N, 2.15W) Castilla-La Manacha, Stream 1810. Rio Cueva (42.32N, 3.55W) Castilla y Leon, Stream 1811. Rio Cueza (42.23N, 4.6W) Castilla y Leon, Stream 1812. Rio Curueno (42.7N, 5.35W) Castilla y Leon, Stream 1813. Rio Cuzna (38.07N, 4.68W) Andalucia, Stream 1814. Rio Danador (38.37N, 3.27W) Andalucia, Stream 1815. Rio Daro (42N, 3.15E) Cataluna, Stream 1816. Rio Darro (37.17N, 3.6W) Andalucia, Stream 1817. Rio das Balsadas (43.58N, 7.58W) Galicia, Stream 1818. Rio das Chousas (42.77N, 7.38W) Galicia, Stream 1819. Rio das Mestas (43.7N, 7.8W) Galicia, Stream 1820. Rio de Abella (42.12N, 0.93E) Cataluna, Stream 1821. Rio de Adra (36.73N, 2.98W) , Stream 1822. Rio de Adran (43.1N, 8.28W) Galicia, Stream 1823. Rio de Agres (38.78N, 0.38W) Valenciana, Stream 1824. Rio de Aguas (37.15N, 1.82W) Andalucia, Stream 1825. Rio de Aguas Blancas (37.15N, 3.52W) Andalucia, Stream 1826. Rio de Agudo (39N, 4.98W) Extremadura, Stream 1827. Rio de Albadalejo (39.73N, 2.2W) Castilla-La Manacha, Stream 1828. Rio de Albalate (40.37N, 2.28W) Castilla-La Manacha, Stream 1829. Rio de Albalejo (39.73N, 2.2W) Castilla-La Manacha, Stream 1830. Rio de Albentosa (40.15N, 0.75W) Aragon, Stream 1831. Rio de Alcaraz (38.67N, 2.57W) Castilla-La Manacha, Stream 1832. Rio de Alcayan (43.08N, 8.77W) Galicia, Stream 1833. Rio de Alcolea (36.97N, 3.02W) , Intermittent Stream 1834. Rio de Alcora (40.08N, 0.15W) Valenciana, Intermittent Stream 1835. Rio de Algarra (39.68N, 1.57W) Castilla-La Manacha, Stream 1836. Rio de Algarrobo (36.75N, 4.05W) Andalucia, Stream 1837. Rio de Aller (43.2N, 5.78W) Asturias, Stream 1838. Rio de Angorrilla (38.62N, 2.58W) Castilla-La Manacha, Stream 1839. Rio de Antas (37.2N, 1.8W) Andalucia, Stream 1840. Rio de Arcos (39.95N, 1.22W) , Stream |