P. [27]. 'producing fronds', fronds is usually in italics. Changed.
P. [27]. 'A synonymn of A. venustum.', changed 'synonymn' to 'synonym'.
P. [41]. 'deeply chanelled', changed 'chanelled' to 'channelled'.
P. [41]. 'A. Wislizeni ... which is under 2ft. broad'; should 'broad' be 'long'? Left as a query.
P. [49]. A Scorodoprasum. 'Europ' changed to 'Europe'.
P. [53]. A. ageratoides. 'receptable" changed to 'receptacle'.
P. [87]. 'surface is punctuate', changed 'punctuate' to 'punctuated'.
P. [87]. 'of less than than', taken out one 'than'.
P. [134]. A. umbrosum. 'laceolate' changed to 'lanceolate'.
P. [162]. 'Caraccas', changed to 'Caracas'.