87 ----------------------------------------------- DESMIDIACEAE AND OTHER CHLOROPHYTES ----------------------------------------------- C 1813 A Westmoreland, England C 1814 B Westmoreland, England C 1815 C North Wales C 1816 D Wales C 1817 E North Wales C 1818 F [No locality given] C 1819 G [No locality given] C 1820 H Wales C 1821 I Coast of Yorkshire, England C 1822 J Dolgelly, Wales C 1823 K West Point, New York C 1824 L West Point, New York M [This letter was not used in this series.] C 1825 N England C 1826 O Wales P-Q-R [The Catalogue notes slides P, Q and R as missing but the bear no numbers in this series.] C 1827 S No locality C 1828 T Wales C 1829 U Wales C 1830 V No locality C 1831 W North Wales C 1832 X Wales C 1833 Y England C 1834 Z Wales [Slides which would have been numbered 1835-1846 are missing and no information is available on what they might have contained.]